CA2069984A1 - Methode d'extraction de preservatifs chimiques du bois par detente a la pression atmospherique - Google Patents
Methode d'extraction de preservatifs chimiques du bois par detente a la pression atmospheriqueInfo
- Publication number
- CA2069984A1 CA2069984A1 CA2069984A CA2069984A CA2069984A1 CA 2069984 A1 CA2069984 A1 CA 2069984A1 CA 2069984 A CA2069984 A CA 2069984A CA 2069984 A CA2069984 A CA 2069984A CA 2069984 A1 CA2069984 A1 CA 2069984A1
- Authority
- CA
- Canada
- Prior art keywords
- wood
- treated
- release
- extraction
- atmospheric pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/023—Cleaning wood chips or other raw materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/36—Explosive disintegration by sudden pressure reduction
Abstract
Les préservatifs et l'huile sont extraits du bois traité. Pour ce faire, on déchiquette le bois traité qu'on désire rebuter, on imprègne les copeaux avec une solution alcaline jusqu'à attendrissement des copeaux et modification de l'état chimique des produits à extraire. Le cas échéant, on peut faire subir aux copeaux un traitement avec de la vapeur saturée à pression superatmosphérique entre 170°C et 210°C suivi d'une détente explosive donnant des fragments de bois. On fait suivre d'une opération de raffinage dans un broyeur assurant le défibrage du bois. Il en résulte une libération substantielle des préservatifs des particules de bois au moins en partie défibrées. On recueille les préservatifs chimiques et l'huile séparément des particules de bois dans les phases aqueuses issues des étapes d'imprégnation, cuisson-détente et raffinage.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002069984A CA2069984C (fr) | 1992-05-29 | 1992-05-29 | Methode d'extraction de preservatifs chimiques du bois par detente a la pression atmospherique |
US07/914,546 US5262004A (en) | 1992-05-29 | 1992-07-16 | Method of extracting chemical preservatives from treated wood |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002069984A CA2069984C (fr) | 1992-05-29 | 1992-05-29 | Methode d'extraction de preservatifs chimiques du bois par detente a la pression atmospherique |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2069984A1 true CA2069984A1 (fr) | 1993-11-30 |
CA2069984C CA2069984C (fr) | 1999-03-09 |
Family
ID=4149930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002069984A Expired - Lifetime CA2069984C (fr) | 1992-05-29 | 1992-05-29 | Methode d'extraction de preservatifs chimiques du bois par detente a la pression atmospherique |
Country Status (2)
Country | Link |
---|---|
US (1) | US5262004A (fr) |
CA (1) | CA2069984C (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU4110696A (en) * | 1994-11-15 | 1996-06-06 | Trustees Of The Stevens Institute Of Technology, The | Method for removing chemical preservatives from wood |
US6372085B1 (en) | 1998-12-18 | 2002-04-16 | Kimberly-Clark Worldwide, Inc. | Recovery of fibers from a fiber processing waste sludge |
KR20010100017A (ko) | 1998-12-30 | 2001-11-09 | 로날드 디. 맥크레이 | 화학물질을 첨가하는 증기 폭발 처리 |
US6413362B1 (en) | 1999-11-24 | 2002-07-02 | Kimberly-Clark Worldwide, Inc. | Method of steam treating low yield papermaking fibers to produce a permanent curl |
WO2004005608A1 (fr) * | 2002-07-02 | 2004-01-15 | Andritz, Inc. | Reduction en pate de biomasse, a l'aide de solvants |
US7364642B2 (en) * | 2003-08-18 | 2008-04-29 | Kimberly-Clark Worldwide, Inc. | Recycling of latex-containing broke |
FI126694B (fi) * | 2005-12-02 | 2017-04-13 | Metsä Board Oyj | Kemimekaaninen massa ja menetelmä sen valmistamiseksi |
CN103669059A (zh) * | 2013-12-11 | 2014-03-26 | 苏州谊恒印务有限公司 | 一种木屑印刷纸浆的制备方法 |
RU2670849C1 (ru) * | 2017-12-21 | 2018-10-25 | ВАВИЛИН Андрей Владимирович | Способ переработки деревянных отходов |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3878994A (en) * | 1973-11-28 | 1975-04-22 | Urban Wood & Fiber Products In | Apparatus and process for treating waste wood |
SE456162B (sv) * | 1986-02-14 | 1988-09-12 | Josef Kubat | Forfarande for framstellning av mycket finfordelat pulver av ved och av andra typer av vegetabilisk biomassa for anvendning som brensle |
US4666612A (en) * | 1986-03-17 | 1987-05-19 | Kerr-Mcgee Chemical Corporation | Method for recovering a wood preservative from waste sludges |
CA1230208A (fr) * | 1987-03-24 | 1987-12-15 | Bohuslav V. Kokta | Preparation de la pate a papier |
US5028229A (en) * | 1987-12-23 | 1991-07-02 | Liquid Container Corporation | Apparatus for in-mold labeling of a blow molded article |
US5029299A (en) * | 1990-05-09 | 1991-07-02 | Altec Lansing Corporation | Power amplifier with current limiting means |
-
1992
- 1992-05-29 CA CA002069984A patent/CA2069984C/fr not_active Expired - Lifetime
- 1992-07-16 US US07/914,546 patent/US5262004A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5262004A (en) | 1993-11-16 |
CA2069984C (fr) | 1999-03-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |