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GB298333A - Process for obtaining cellulose from ligno-cellulosic material - Google Patents

Process for obtaining cellulose from ligno-cellulosic material

Info

Publication number
GB298333A
GB298333A GB2274927A GB2274927A GB298333A GB 298333 A GB298333 A GB 298333A GB 2274927 A GB2274927 A GB 2274927A GB 2274927 A GB2274927 A GB 2274927A GB 298333 A GB298333 A GB 298333A
Authority
GB
United Kingdom
Prior art keywords
treatment
straw
wool
per cent
alkaline earth
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
GB2274927A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB298333A publication Critical patent/GB298333A/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/18—Pulping cellulose-containing materials with halogens or halogen-generating compounds

Landscapes

  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Compounds Of Unknown Constitution (AREA)

Abstract

298,333. Imray, O. Y., (I. G. Farbenindustrie Akt.-Ges.). Aug. 30, 1927. Pulp, preparation of. - In the manufacture from wood, straw, grasses, or the like of cellulose free from lignin, the material is treated at a temperature not exceeding 45‹ C. with such a quantity of an alkaline earth hypochlorite solution as is just sufficient for complete oxidation of the liquor, the solution used originally containing at least 2 per cent of available chlorine and being always maintained feebly alkaline with an alkaline earth such as calcium hydroxide. In examples which are described for the treatment of pinewood wool, esparto, beechwood wool, straw, and bamboo, the materials are previously crushed and subjected to treatment with caustic soda lye of 0.5 to 1 per cent strength at 95‹ C., and washed until free from alkali, and the treatment with hypochlorite is continued until a sample of the product shows no lignin reaction towards phloroglucinol.
GB2274927A 1927-08-23 1927-08-30 Process for obtaining cellulose from ligno-cellulosic material Expired GB298333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI34291D DE506229C (en) 1927-08-23 1927-08-23 Process for the digestion of vegetable fibers with the help of calcium hypochlorite

Publications (1)

Publication Number Publication Date
GB298333A true GB298333A (en) 1928-10-11

Family

ID=10184461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2274927A Expired GB298333A (en) 1927-08-23 1927-08-30 Process for obtaining cellulose from ligno-cellulosic material

Country Status (3)

Country Link
DE (1) DE506229C (en)
FR (1) FR648706A (en)
GB (1) GB298333A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435566A (en) * 1944-10-16 1948-02-10 West Virginia Pulp & Paper Co Peroxide bleaching of ground wood
US2474034A (en) * 1946-12-04 1949-06-21 Paper Patents Co Bleaching poplar groundwood
US2516664A (en) * 1944-10-16 1950-07-25 West Virginia Pulp & Paper Co Hypochlorite bleaching of ground wood
US2962413A (en) * 1956-10-19 1960-11-29 Ernest R Hatheway Method of producing cellulosic pulp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435566A (en) * 1944-10-16 1948-02-10 West Virginia Pulp & Paper Co Peroxide bleaching of ground wood
US2516664A (en) * 1944-10-16 1950-07-25 West Virginia Pulp & Paper Co Hypochlorite bleaching of ground wood
US2474034A (en) * 1946-12-04 1949-06-21 Paper Patents Co Bleaching poplar groundwood
US2962413A (en) * 1956-10-19 1960-11-29 Ernest R Hatheway Method of producing cellulosic pulp

Also Published As

Publication number Publication date
DE506229C (en) 1930-08-30
FR648706A (en) 1928-12-13

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