WO1990010498A1 - Apparatus and process for the reversible adsorption of chlorinated hydrocarbons, in particular tetrachloroethylene, on suitable adsorbents - Google Patents

Apparatus and process for the reversible adsorption of chlorinated hydrocarbons, in particular tetrachloroethylene, on suitable adsorbents Download PDF

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Publication number
WO1990010498A1
WO1990010498A1 PCT/CH1990/000056 CH9000056W WO9010498A1 WO 1990010498 A1 WO1990010498 A1 WO 1990010498A1 CH 9000056 W CH9000056 W CH 9000056W WO 9010498 A1 WO9010498 A1 WO 9010498A1
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Prior art keywords
chlorinated hydrocarbons
adsorption
desorption
adsorbents
ceramic
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Application number
PCT/CH1990/000056
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German (de)
French (fr)
Inventor
Zibgief Boguslawski
Original Assignee
Aquamot Ag
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Publication of WO1990010498A1 publication Critical patent/WO1990010498A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28042—Shaped bodies; Monolithic structures
    • B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28095—Shape or type of pores, voids, channels, ducts
    • B01J20/28097—Shape or type of pores, voids, channels, ducts being coated, filled or plugged with specific compounds

Definitions

  • the present invention relates to a device and method for the reversible adsorption of chlorinated hydrocarbons, in particular perchlorethylene, on suitable adsorbents.
  • the invention is based on a device and a method according to the preamble of patent claim 1.
  • Chlorohydrocarbon compounds in which one or more hydrocarbon atoms have been replaced by chlorine atoms are, for example, the chloromethanes which are easily absorbed through the skin and which have partially narcotic properties.
  • Such connections are used, inter alia, in heat transfer and pest Pesticides contain all of their well-known effects, not least the polychlorinated biphenyls, puranes, dioxins and many more
  • Hydrocarbons in which all H atoms are substituted by Cl atoms are referred to as perchlorinated compounds or chlorinated hydrocarbons. They include carbon tetrachloride, tetrachlorethylene, hexachloroethane, hexachlorobenzene, etc.
  • Tetrachlorethylene in particular, such as perchlorethylene or PER for short, are excellent solvents and extractants for animal and vegetable fats and oils. These are excellent degreasing agents for metal parts and devices, as well as very effective cleaning agents for the chemical cleaning of textiles. Production and use are correspondingly high, but the emissions of PER in the vicinity are also proportionate. In the Federal Republic of Germany alone, they are estimated to be around 60,000 T annually. in living quarters, supermarkets, restaurants or commercial establishments that are in the immediate vicinity of chemical cleaning facilities, PER concentrations are often far above the legally permitted
  • the aim of the present invention was therefore to create a device and a method which is easy and environmentally friendly to handle, with which chlorinated hydrocarbons, in particular PER, are reversibly adsorbed and after thermal desorption with the greatest possible regeneration of the adsorptively active system Allow it to be returned to the solvent cycle as completely as possible.
  • Adsorption materials comes. Regeneration is often carried out using water vapor when the CHC is practically immiscible with water. However, it cannot be complete if extremely long periods of time are not available for this, since CHCs adsorbed deep inside the granules are difficult to access. Handling the used adsorption materials, in particular activated carbon, is also problematic because of the large dust load.
  • CHC-suitable adsorbents such as activated carbon, molecular sieves, tenax (2,6-diphenyl-p-phenylene oxide) or mixtures thereof in thin layers, with suitable binders which may support the adsorption, such as, for example, AlgO, are applied to gas-permeable, open-pore support bodies, such as foam ceramic, glass ceramic foam, ceramic membranes and others. If the substance to be adsorbed does not have a dissolving effect and the temperatures are not too high, reticulated polyurethane foam or the like can also be used as the carrier material.
  • the adsorptive particles with their porous structure and the correspondingly large surface are only firmly anchored in the binder layer on their underside, while the upper part remains easily accessible. This results in a surprisingly large absorption capacity for chlorinated hydrocarbons, as was shown in laboratory tests.
  • Ex-containing exhaust air is suctioned 1 from the cleaning machine 2. It then flows through a coarse filter 3 . where it is freed from solid particles, in the open-pore, gas-permeable adsorption system of the ceramic filter 4, there the chlorinated hydrocarbons are removed by adsorption. The remaining air is returned to the cleaning machine 2, which creates a closed circuit.
  • a pump is indicated at 5 and a hot air fan at 6 for PER recycling.
  • the thermal desorption is carried out in a ei ⁇ genes, closed circuit, respectively, when the exhaust air circulation is not in operation, eg CS ⁇ rend the working phase of the cleaning machine 0 Using a hot-air fan 6, heated air is passed through the adsorption system, thereby desorbed CKW and be carried along. After cooling, they condense and return to the PER storage tank 7 and are then fully available again as cleaning agents. It is particularly worth mentioning that the temperature required for the desorption is also below the respective CHC boiling point - at PER 121 ° C., ie the energy expenditure for the recycling process can be kept low,
  • a device consisting of a vacuum pump and cold trap can be provided in such a way that the desorbed chlorinated hydrocarbons are collected and placed in the solution. medium cycle can be returned. It is particularly important here to use hard, rigid and therefore non-deformable support bodies made of preferably ceramic materials.
  • a valve can also be installed in such a way that the exhaust air circuit, which is in principle closed, can be opened to the atmosphere, so that cleaned exhaust air can escape.
  • two adsorption systems can also be arranged such that adsorption and desorption can take place in tandem operation.
  • a total room air disposal can also be installed, equipped with an adsorption and filter ⁇ system according to claim 1, various suction devices in the form of point disposal can be connected to this system, for example on the machine door, the ironing board, a closed cupboard as an interim storage for freshly cleaned clothes, etc.
  • the adsorptive filter system is also - as listed in claim 3 to 5 -, in wt ⁇ issen Zeit ⁇ intervals automatically condensation and remindge- winnung of PER regenerated.

Abstract

The invention concerns an apparatus and process for the reversible adsorption of chlorinated hydrocarbons, in particular tetrachloroethylene, on suitable adsorbents such as activated charcoal, molecular sieves, tenax (2,6-diphenyl-p-phenyloxide), etc. The air carrying the chlorohydrocarbons is passed through an adsorption system containing gas-permeable, open-pore substrate elements made of foamed ceramic, glass ceramic foam, ceramic membranes, etc., on which the adsorptive materials have been applied in thin layers. This gives not only a high specific adsorptivity for chlorinated hydrocarbons but also rapid desorption, and almost complete system regeneration is possible. Desorption of the chlorohydrocarbons can be carried out by heating and/or by generating an underpressure, in alternation if necessary.

Description

Vorrichtung und Verfahren zur reversiblen Adsorption chlorierter Kohlenwasserstof e insbesondere Perchloräthylen an geeigneten Adsorbentien. Device and method for the reversible adsorption of chlorinated hydrocarbons, in particular perchlorethylene, on suitable adsorbents.
Die vorliegende Erfindung betrifft eine Vorrich¬ tung und Verfahren zur reversiblen Adsorption chlo¬ rierter Kohlenwasserstoffe, insbesondere Perchloräthy¬ len an geeigneten Adsorbentien. Die Erfindung geht von einer Vorrichtung und ei¬ nem Verfahren aus gemäss dem Oberbegriff des Patent¬ anspruches 1.The present invention relates to a device and method for the reversible adsorption of chlorinated hydrocarbons, in particular perchlorethylene, on suitable adsorbents. The invention is based on a device and a method according to the preamble of patent claim 1.
Chlorkohlenwasserstoff-Verbindungen, bei denen ein oder mehrere Kohlenwasserstoffatome durch Chloratome ersetzt sind, sind z.B. die Chlormethane, die leicht durch die Haut resorbiert werden und die teilweise narkotisierende Eigenschaften besitzen. Solche Verbin¬ dungen sind u.a. in Wärmeübertragungs- und Schädlings- bekämpfungsmittel enthalten mit all ihren allseits bekannten irkungen, nicht zuletzt auch die poly- chlorierten Biphenyle, Purane, Dioxine u.v.a.Chlorohydrocarbon compounds in which one or more hydrocarbon atoms have been replaced by chlorine atoms are, for example, the chloromethanes which are easily absorbed through the skin and which have partially narcotic properties. Such connections are used, inter alia, in heat transfer and pest Pesticides contain all of their well-known effects, not least the polychlorinated biphenyls, puranes, dioxins and many more
Kohlenwasserstoffe, bei denen alle H-Atome durch Cl-Atome substituiert sind, bezeichnet man als per¬ chlorierte Verbindungen oder Chlorkohlenwasserstoffe. Zu ihnen gehören Tetrachlorkohlenstoff, Tetrachlor¬ äthylen, Hexachloraethan, Hexachlorbenzol usw.Hydrocarbons in which all H atoms are substituted by Cl atoms are referred to as perchlorinated compounds or chlorinated hydrocarbons. They include carbon tetrachloride, tetrachlorethylene, hexachloroethane, hexachlorobenzene, etc.
Obwohl man heute sehr viel zurückhaltender in Anwendung und Umgang mit solchen Substanzen ist, kann man nicht vollständig auf sie verzichten. Insbesondere Tetrachloräthylen, wie auch Perchloräthylen oder kurz PER bezeichnet, sind ausgezeichnete Lösungs- und Ex¬ traktionsmittel für tierische und pflanzliche Fette und Oele. Es sind dies hervorragende Enti'ettungsmittel für Metallteile und Geräte, sowie sehr wirkungsvolle Reinigungsmittel für die chemische Reinigung von Tex¬ tilien. Entsprechend hoch sind Produktion und Einsatz, anteilmässig aber auch die Emission von PER in die Um- weit. Allein in der Bundesrepublik Deutschland schätzt man sie auf jährlich etwa 60 000 T. Als unmittelbare Folge misst man z.B. in Wohnräumen, Supermärkten, Gaststätten oder Gewerbebetrieben, die in unmittelbarer Nähe chemischer Reinigungen liegen, häufig PER-Kon- zentrationen weit über den gesetzlich zulässigenAlthough you are much more reluctant to use and handle such substances today, you cannot completely do without them. Tetrachlorethylene, in particular, such as perchlorethylene or PER for short, are excellent solvents and extractants for animal and vegetable fats and oils. These are excellent degreasing agents for metal parts and devices, as well as very effective cleaning agents for the chemical cleaning of textiles. Production and use are correspondingly high, but the emissions of PER in the vicinity are also proportionate. In the Federal Republic of Germany alone, they are estimated to be around 60,000 T annually. in living quarters, supermarkets, restaurants or commercial establishments that are in the immediate vicinity of chemical cleaning facilities, PER concentrations are often far above the legally permitted
Höchstwerten. Inzwischen gilt PER auch als krebserzeu- gende Substanz.Maximum values. PER is now also considered a carcinogen substance.
Ziel der vorliegenden Erfindung war es daher, ei¬ ne Vorrichtung und ein bequem und umweltfreundlich zu handhabendes Verfahren zu schaffen, womit sich chlo- rierte Kohlenwasserstoffe, insbesondere PER, reversibel adsorbieren und nach thermischer Desorption unter weit¬ gehendster Regeneration des adsorptiv wirksamen Sys¬ tems möglichst vollständig wieder in den Lösungsmittel¬ kreislauf zurückführen lassen.The aim of the present invention was therefore to create a device and a method which is easy and environmentally friendly to handle, with which chlorinated hydrocarbons, in particular PER, are reversibly adsorbed and after thermal desorption with the greatest possible regeneration of the adsorptively active system Allow it to be returned to the solvent cycle as completely as possible.
Es sind Verfahren bekannt, bei denen Aktivkohle¬ granulate in einem Schütteϊbett als Adsorbentien für chlorierte Kohlenwasserstof e, auch für Perchloräthy¬ len in chemischen Reinigungsbetrieben, eingesetzt wer¬ den. Ihr Nachteil ist, dass es im Schüttgut zu Rinnen- bildung und damit zu unterschiedlicher Beladung derProcesses are known in which activated carbon granules are used in a bed as adsorbents for chlorinated hydrocarbons, also for perchlorethylene in chemical cleaning companies. Their disadvantage is that there is channeling in the bulk material and thus different loading of the
Adsorptionsmaterialien kommt. Die Regeneration erfolgt häufig durch Vasserdampf und zwar dann, wenn der CKW praktisch nicht mit Wasser mischbar ist. Sie kann je¬ doch nicht vollständig sein, wenn hiefür nicht extrem lange Zeiträume zur Verfügung stehen, denn tief im Innern der Granulate adsorbierte CKW sind nur schwer zugänglich. Auch ist das Hantieren mit verbrauchten Adsorptionsmaterialien, insbesondere Aktivkohle, prob¬ lematisch wegen der grossen Staubbelastung. Das erfindungsgemässe Verfahren beseitigt diese Nachteile dadurch, dass CKW-geeignete Adsorbentien wie z.B. Aktivkohle, Molekularsiebe, Tenax (2,6-Diphe- nyl-p-phenylenoxid) oder auch deren Mischungen in dünnen Schichten, mit geeigneten, die Adsorption ge¬ gebenenfalls unterstützenden Bindemittel, wie z.B. AlgO- auf gasdurchlässigen, offenporigen Trägerkör¬ pern wie Schaumkeramik, Glaskeramikschaum, Keramik- Membranen u.a. aufgebracht sind. Sofern die zu adsor¬ bierende Substanz nicht auflösend wirkt und die Tem¬ peraturen nicht zu hoch sind, kann auch retikulier- ter Polyurethanschaum o.a. als Trägermaterial einge¬ setzt werden.Adsorption materials comes. Regeneration is often carried out using water vapor when the CHC is practically immiscible with water. However, it cannot be complete if extremely long periods of time are not available for this, since CHCs adsorbed deep inside the granules are difficult to access. Handling the used adsorption materials, in particular activated carbon, is also problematic because of the large dust load. The process according to the invention eliminates these disadvantages in that CHC-suitable adsorbents such as activated carbon, molecular sieves, tenax (2,6-diphenyl-p-phenylene oxide) or mixtures thereof in thin layers, with suitable binders which may support the adsorption, such as, for example, AlgO, are applied to gas-permeable, open-pore support bodies, such as foam ceramic, glass ceramic foam, ceramic membranes and others. If the substance to be adsorbed does not have a dissolving effect and the temperatures are not too high, reticulated polyurethane foam or the like can also be used as the carrier material.
Die adsorptiv wirksamen Partikel mit ihrer po¬ rösen Struktur und der dementsprechend grossen Ober¬ fläche werden nur an ihrer Unterseite in der Binde¬ mittelschicht fest verankert, der obere Teil dagegen bleibt leicht zugänglich. Hierdurch wird ein über- raschend grαsses Aufnahmevermögen für chlorierte Kohlenwasserstoffe erreicht, wie sich bei Labor¬ tests zeigte.The adsorptive particles with their porous structure and the correspondingly large surface are only firmly anchored in the binder layer on their underside, while the upper part remains easily accessible. This results in a surprisingly large absorption capacity for chlorinated hydrocarbons, as was shown in laboratory tests.
Die Vorrichtung und das Verfahren mit den oben genannten und im Patentanspruch 1 aufgeführten Merk- malen soll nachfolgend für die reversible Adsorption von PER in einem chemischen Reinigungsbetrieb als Beispiel und anhand einer Zeichnung näher beschrieben werden.The device and the method with the features mentioned above and specified in claim 1 will be described below for the reversible adsorption of PER in a chemical cleaning company as an example and with reference to a drawing.
PER-haltige Abluft wird mit Hilfe eines Venti- lators 1 aus der Reinigungsmaschine 2 abgesaugt. Sie strömt alsdann durch einen Grobfilter 3. wo sie von Feststoffpartikelchen befreit wird,in das offenporige, gasdurchlässige Adsorptionssystem des Keramikfilters 4, Daselbst werden die chlorierten Kohlenwasserstoffe adsorptiv entfernt. Die restliche Luft wird in die Reinigungsmaschine 2 zurückgeführt, wodurch ein ge¬ schlossener Kreislauf entsteht. Mit 5 ist eine Pumpe angedeutet und mit 6 einen Heissluftventilator für eine PER-Recyclierung.Ex-containing exhaust air is suctioned 1 from the cleaning machine 2. It then flows through a coarse filter 3 . where it is freed from solid particles, in the open-pore, gas-permeable adsorption system of the ceramic filter 4, there the chlorinated hydrocarbons are removed by adsorption. The remaining air is returned to the cleaning machine 2, which creates a closed circuit. A pump is indicated at 5 and a hot air fan at 6 for PER recycling.
Die thermische Desorption erfolgt in einem ei¬ genen, geschlossenen Kreislauf jeweils dann, wenn der Abluftkreislauf nicht in Betrieb ist, also z.B. wäh¬ rend der Arbeitsphase der Reinigungsmaschine0 Mit Hilfe eines Heissluftventilators 6 wird erhitzte Luft durch das Adsorptionssystem geleitet, wodurch die CKW desorbiert und mitgeführt werden. Nach Ab¬ kühlung kondensieren sie und gelangen zurück in den PER Vorratstank 7 und stehen alsdann als Reinigungs- mittel wieder voll zur Verfügung. Besonders zu erwäh¬ nen ist, dass die für die Desorption nötige Tempera¬ tur auch unterhalb des jeweiligen CKW-Siedepunktes - bei PER 121° C - liegen, d.h. der Energieaufwand für den Recycling-Prozess kann niedrig gehalten werden,The thermal desorption is carried out in a ei¬ genes, closed circuit, respectively, when the exhaust air circulation is not in operation, eg wäh¬ rend the working phase of the cleaning machine 0 Using a hot-air fan 6, heated air is passed through the adsorption system, thereby desorbed CKW and be carried along. After cooling, they condense and return to the PER storage tank 7 and are then fully available again as cleaning agents. It is particularly worth mentioning that the temperature required for the desorption is also below the respective CHC boiling point - at PER 121 ° C., ie the energy expenditure for the recycling process can be kept low,
Alternativ oder ergänzend hierzu kann eine Vor¬ richtung, bestehend aus Vakuumpumpe und Kältefalle, so vorgesehen werden, dass die desorbierten Chlor¬ kohlenwasserstof e aufgefangen und in den Lösungs- mittelkreislauf zurückgeführt werden. Hierbei ist es besonders wichtig, harte, starre und damit im Vakuum nicht verformbare Trägerkörper aus vorzugsweise ke¬ ramischen Materialien einzusetzen. Auch kann ein Ventil so eingebaut sein, dass der im Prinzip geschlossene Abluftkreislauf zur Atmosphäre hin zu öffnen ist, so dass gereinigte Abluft entweichen kann, Schliesslich können auch zwei Adsorptionssysteme so angeordnet wer¬ den, dass Adsorption und Desorption im Tandembetrieb erfolgen können.As an alternative or in addition to this, a device consisting of a vacuum pump and cold trap can be provided in such a way that the desorbed chlorinated hydrocarbons are collected and placed in the solution. medium cycle can be returned. It is particularly important here to use hard, rigid and therefore non-deformable support bodies made of preferably ceramic materials. A valve can also be installed in such a way that the exhaust air circuit, which is in principle closed, can be opened to the atmosphere, so that cleaned exhaust air can escape. Finally, two adsorption systems can also be arranged such that adsorption and desorption can take place in tandem operation.
Da PER jedoch auch in nicht unerheblichen Mengen nach Ende eines Maschinenganges beim Oeffnen der Trom¬ mel entweichen und dann zu einem weiteren Teil aus den gereinigten Kleidungsstücken emittiert wird, kann zu- sätzlich eine Gesamtraum-Luftentsorgung installiert werden, bestückt mit einem Adsorptions- und Filter¬ system gemäss Anspruch 1, An dieses System lassen sich verschiedene Absaugvorrichtungen in Form von Punkt¬ entsorgungen anschliessen, z.B. an der Automatentür, dem Bügeltisch, einem geschlossenen Schrank als Zwisch¬ enlager für die frisch gereinigte Kleidung usw. Das adsorptiv wirksame Filtersystem wird ebenfalls - wie unter Anspruch 3 bis 5 aufgeführt -, in gewτissen Zeit¬ intervallen automatisch unter Kondensation und Rückge- winnung von PER regeneriert. However, since PER also escapes in considerable amounts after the end of a machine operation when the drum is opened and then a further part is emitted from the cleaned clothes, a total room air disposal can also be installed, equipped with an adsorption and filter ¬ system according to claim 1, various suction devices in the form of point disposal can be connected to this system, for example on the machine door, the ironing board, a closed cupboard as an interim storage for freshly cleaned clothes, etc. The adsorptive filter system is also - as listed in claim 3 to 5 -, in wt τ issen Zeit¬ intervals automatically condensation and Rückge- winnung of PER regenerated.

Claims

P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
1. Vorrichtung und Verfahren zur reversiblen Adsorp¬ tion chlorierter Kohlenwasserstoffe, insbesondere von Perchloraethylen an geeigneten Adsorbentien, insbesondere an Aktivkohle, Molekualrsieben, Te- nax (2,6-Diphenyl-p-phenylenoxid) u.a., dadurch gekennzeichnet, dass diese Adsorbentien in dünnen Schichten mit geeigneten, die Adsorption gegebenenfalls unter¬ stützenden Bindemitteln, wie z.B. lgO, auf gas- durchlässigen, offenporigen Trägerkörpern, z.B. Schaumkeramik, Glaskeramikschaum, Keramikmembra¬ nen, retikulierte Polyurethanschaum u.a. auf¬ gebracht sind.1. Device and method for the reversible adsorption of chlorinated hydrocarbons, in particular of perchlorethylene on suitable adsorbents, in particular on activated carbon, molecular sieves, tenax (2,6-diphenyl-p-phenylene oxide) and others, characterized in that these adsorbents are in thin form Layers with suitable binders, optionally supporting the adsorption, such as, for example, 1 g O, are applied to gas-permeable, open-pore support bodies, for example foam ceramic, glass ceramic foam, ceramic membranes, reticulated polyurethane foam and others.
2. Vorrichtung und Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Aufbringung der Adsorbentien so erfolgt, dass die adsorptiv wirksame Schicht eine möglichst grosse Oberfläche und ein dementsprechend grosses Aufnahmevermögen für die Chlorkohlenwasserstof e besitzt, ihre Dicke aber so gering bemessen ist, dass eine rasche thermische Desorption möglich ist.2. The device and method according to claim 1, characterized in that the adsorbents are applied in such a way that the adsorptive layer has the largest possible surface area and a correspondingly large capacity for the chlorinated hydrocarbons, but its thickness is so small that a rapid thermal desorption is possible.
3. Vorrichtung und Verfahren nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Desorption durch Wärmezufuhr und ent¬ sprechende Temperaturerhöhung erfolgt, wτobei die einzelnen Temperaturen unterhalb der Siedepunkte der zugehörigen chlorierten Kohlenwasserstoffe zu liegen kommen,3. Device and method according to one of claims 1 to 2, characterized in occurs that the desorption by heat supply and ent speaking temperature increase, τ w obei the individual temperatures below the boiling points of the corresponding chlorinated hydrocarbons come to lie,
... Vorrichtung und Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die desorbierten Chlorkohlenwasserstoffe mit 0 Hilfe geeigneter Vorrichtungen, wie Kühlfalle,... Device and method according to one of claims 1 to 3, characterized in that the desorbed chlorinated hydrocarbons with the help of suitable devices, such as cold traps,
Vakuumpumpe, aufgefangen und in den Lösungsmittel¬ kreislauf zurückgeführt werden.Vacuum pump, collected and returned to the solvent circuit.
5. Vorrichtung und Verfahren nach einem der Ansprüche 1 bis _., 5 dadurch gekennzeichnet, dass zwei Adsorptionssysteme so angeordnet werden, dass Adsorption und Desorption im Tandembetrieb erfolgen . 5. Device and method according to one of claims 1 to _., 5 characterized in that two adsorption systems are arranged so that adsorption and desorption take place in tandem operation.
PCT/CH1990/000056 1989-03-07 1990-03-06 Apparatus and process for the reversible adsorption of chlorinated hydrocarbons, in particular tetrachloroethylene, on suitable adsorbents WO1990010498A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030109A1 (en) * 1995-03-24 1996-10-03 Colcard Pty. Limited Refrigerant separation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105699569A (en) * 2016-03-10 2016-06-22 上海福劳斯检测技术有限公司 Self-cleaning type thermal-desorption gas chromatographic system for online total hydrocarbon analysis

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523079A1 (en) * 1975-05-24 1976-11-25 Boewe Boehler & Weber Kg Masch DEVICE FOR ABSORBING SOLVENT GASES FROM AN AIRFLOW
US4102816A (en) * 1976-10-18 1978-07-25 The United States Of America As Represented By The Secretary Of The Interior Adsorbent for polynuclear aromatic compounds
US4239516A (en) * 1979-03-08 1980-12-16 Max Klein Porous media to separate gases liquid droplets and/or solid particles from gases or vapors and coalesce entrained droplets
EP0023054A1 (en) * 1979-06-27 1981-01-28 Metallgesellschaft Ag Process for the purification of exhaust air containing organic noxious matter
EP0189041A1 (en) * 1985-01-19 1986-07-30 Hoechst Aktiengesellschaft Process for the recovery of solvents in cleaning processes
DE8614516U1 (en) * 1986-06-02 1987-07-02 Edt Technik-Consult Und Umweltsysteme Gmbh Privates Institut Fuer Umweltschutz, 6300 Giessen, De
US4703032A (en) * 1984-03-24 1987-10-27 Perfluktiv Technik Ag Active coke produced from pit coal and production process thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523079A1 (en) * 1975-05-24 1976-11-25 Boewe Boehler & Weber Kg Masch DEVICE FOR ABSORBING SOLVENT GASES FROM AN AIRFLOW
US4102816A (en) * 1976-10-18 1978-07-25 The United States Of America As Represented By The Secretary Of The Interior Adsorbent for polynuclear aromatic compounds
US4239516A (en) * 1979-03-08 1980-12-16 Max Klein Porous media to separate gases liquid droplets and/or solid particles from gases or vapors and coalesce entrained droplets
EP0023054A1 (en) * 1979-06-27 1981-01-28 Metallgesellschaft Ag Process for the purification of exhaust air containing organic noxious matter
US4703032A (en) * 1984-03-24 1987-10-27 Perfluktiv Technik Ag Active coke produced from pit coal and production process thereof
EP0189041A1 (en) * 1985-01-19 1986-07-30 Hoechst Aktiengesellschaft Process for the recovery of solvents in cleaning processes
DE8614516U1 (en) * 1986-06-02 1987-07-02 Edt Technik-Consult Und Umweltsysteme Gmbh Privates Institut Fuer Umweltschutz, 6300 Giessen, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996030109A1 (en) * 1995-03-24 1996-10-03 Colcard Pty. Limited Refrigerant separation

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