GB498259A - Improved process for opening up materials containing cellulose - Google Patents

Improved process for opening up materials containing cellulose

Info

Publication number
GB498259A
GB498259A GB29724/37A GB2972437A GB498259A GB 498259 A GB498259 A GB 498259A GB 29724/37 A GB29724/37 A GB 29724/37A GB 2972437 A GB2972437 A GB 2972437A GB 498259 A GB498259 A GB 498259A
Authority
GB
United Kingdom
Prior art keywords
wood
hydrogen chloride
halogen hydride
solution
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.)
Expired
Application number
GB29724/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB498259A publication Critical patent/GB498259A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds

Landscapes

  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Cellulose materials such as wood meal or shavings are opened up by thoroughly moistening them with a concentrated aqueous solution of a halogen hydride and subsequently treating them with halogen hydride in presence of an organic liquid which is a solvent for the halogen hydride. Preferably the cellulose material is dried prior to treatment with the aqueous acid solution or prior to treatment with the organic liquid solution of the acid. Hydrochloric acid is the preferred halogen hydride. In an example, small pieces of dried wood are sprayed in a mixer with a strong solution of hydrogen chloride in water. After standing for several hours the wood is placed in a cool mixture of benzine and carbon tetrachloride in a pressure vessel with stirrer and circulating pump. Hydrogen chloride gas is introduced and the pressure is increased, the wood being stirred continuously. After several hours the pressure is released and the hydrogen chloride and solvent are removed from the wood.
GB29724/37A 1937-05-27 1937-10-30 Improved process for opening up materials containing cellulose Expired GB498259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE498259X 1937-05-27

Publications (1)

Publication Number Publication Date
GB498259A true GB498259A (en) 1939-01-05

Family

ID=6545274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29724/37A Expired GB498259A (en) 1937-05-27 1937-10-30 Improved process for opening up materials containing cellulose

Country Status (1)

Country Link
GB (1) GB498259A (en)

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