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Publication numberUS624972 A
Publication typeGrant
Publication dateMay 16, 1899
Filing dateJun 11, 1888
Publication numberUS 624972 A, US 624972A, US-A-624972, US624972 A, US624972A
InventorsHeinrich Precht
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 624972 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Mudel.)

Patented May l6, I899.


(Application filed June 11, 1898.)




sPECIFICATION forming part of Letters Patent No. 624,972, dated. May 16, 1899.

Application filed June 11, 1898. Serial No. 683,177. (No specimens.)

To all whont it may concern:

Be it known that I, HEINRICH PRECHT, a sub ject of the King of Prussia, Emperor of Germany, residing at Neustassfurt, near Stassfurt, Prussia, Germany, have invented certain new and useful Improvements in Packing Cam stic Alkalies in \Vooden Casks, of which the following is a specification.

Alkaline hydrates, such as hydrate of potash (QKHO) and hydrate of soda, (2NaIIO,) have a marked corrosive efiect on organic substances and destroy wood which has been exposed some time to their influence. This is more especially noticeable in the case of alkaline hydrates which are kept and despatched in wooden casks, because these substances absorb moisture from the atmosphere and become deliqueseent.

I have found a new process for protecting wood against the deli'quiating action of the alkaline hydrates. This process consists in surrounding the latter with a body which does not attack wood and exercises no detrimental action on them. I use for this purpose potash, (K,CO potassium-bicarbonate, (KIICOM soda, (Na,CO and sodium-bi-earbonate (NaIlCO either separately or mixed in any desired way.

The accompanying drawing represents a longitudinal section, partly in elevation, of a caustic-alkali package embodying my invention.

In carrying out my invention I spread at the bottom of the barrel A alayer of the aforesaid materials a, uponwhichI place alkaline hydrate which has been melted and cast in blocks 1) of circular or semicircular shape. Thereupon I ram in the protecting materials firmly between the wood and the alkaline hydrate. When the barrel or receptacle has been filled up with successive layers of alka line, hydrate, the protecting materials are spread on the top and firmly rammed or pressed in. The cover is then put on and the barrel closed.

The thickness of the layers of protecting materials depends upon their density and also upon the amount thereof which, through the absorption of moisture, will cifect an air-tight envelop or casing.

Potash (K 00 and soda (Na CO,) which drates.

have been deprived of water answer the purpose admirably, because they absorb the moisture which penetrates through the wood, expand, and form a solid coating enveloping the alkaline hydrate.

The alkaline-bi-carbonatesviz., KIICO and NalICO present the great advantage that they give oft carbonic acid (00,) and transform the surface of the alkaline hydrate into a crust of alkaline carbonate.

It is to be understood that the protecting materials can be used either mixed together or each one separately by itself.

The thickness of the protecting-envelop depends also upon the proportions in which the packed materials are to be consumed. If the goods are to be used for the manufacture of soap, the protecting-envelop should not form more than twenty to thirty per cent. of the total contents, as such a proportion of alkaline carbonates or bi-carbonates is used in connection with the alkaline hydrates. If the goods are to be used for the purification of water the alkaline hydrate can be inelosed in a larger mass of protecting materials.

Through the adoption of my process the iron barrels and drums which were hitherto used for the storing and transport of alkaline hydrates can be dispensed with. On the other hand, the packing-barrels which have been used in accordance with my invention can be further utilized for other purposesa point of especial importance in the manufacture of soap.

A mixture of gypsum and rye-flour with a coating of resin, as has been proposed and applied for coating the outside of casks and the like, has not given the expected results, because gypsum, rye-flour, and resin are attacked and decomposed by caustic alkalies.

According to my invention the alkaline hydrates are surrounded by protecting materials which consist of alkaline carbonates or bicarbonatos, which consequently cannot exercise flJl-lnjllllOllS action-onthe alkaline hy- Apart from this protecting-envelope of alkaline carbonates or bi-carbonates possess also the advantage that they can be used along with the alkaline hydrates.

What I claim: is

The method of packing caustic alkalies in -icl1 consists in casting caustic a'lkamy name in the presence of two subscribing flocks, placing such blocks within witnesses.

u'o of contact with the walls thereof r posing between such walls and the; V HEINRICH PRECH the blocks an additional body of an \Vitnesses:

carbonate, substantially as specified. MINGAND,

:ess whereof I have hereunto signed HENRY W. DIEDERICH.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3519250 *Jun 26, 1967Jul 7, 1970Feb Great Britain LtdStorage and handling of chemical substances
US4644733 *Jan 16, 1986Feb 24, 1987The Dow Chemical CompanyDunnage material
US4845923 *Aug 6, 1987Jul 11, 1989Donovan Dennis MContaminated sharp object disposal method
Cooperative ClassificationA61K2800/526