GB410005A - Manufacture of a purified cellulose - Google Patents

Manufacture of a purified cellulose

Info

Publication number
GB410005A
GB410005A GB27669/33A GB2766933A GB410005A GB 410005 A GB410005 A GB 410005A GB 27669/33 A GB27669/33 A GB 27669/33A GB 2766933 A GB2766933 A GB 2766933A GB 410005 A GB410005 A GB 410005A
Authority
GB
United Kingdom
Prior art keywords
per cent
treated
cellulose
hours
manufacture
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
GB27669/33A
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 GB410005A publication Critical patent/GB410005A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/08Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • D21C9/083Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)

Abstract

In the manufacture of cellulose of high a -cellulose content, a pulp obtained by any opening up treatment is subjected in a moist state to a chlorination and is then treated with caustic alkali of 5--10 per cent strength with simultaneous introduction of gaseous chlorine in the cold or at a raised temperature. Air dried beechwood shavings are treated with dilute nitric acid for about 12 hours at 30 DEG C. The excess acid is removed, and the mass treated with water or with dilute nitric acid (up to 1 per cent strong) at 70--80 DEG C. for 5--6 hours. The cellulose thus obtained is treated with 2.5 per cent of chlorine, washed with very weak alkali and treated at 60 DEG C. for 1--2 hours, in a liquor adjusted to contain 9 per cent of caustic soda and 6 per cent of cellulose, with 2 per cent of gaseous chlorine.
GB27669/33A 1932-10-08 1933-10-07 Manufacture of a purified cellulose Expired GB410005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE410005X 1932-10-08

Publications (1)

Publication Number Publication Date
GB410005A true GB410005A (en) 1934-05-10

Family

ID=6422518

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27669/33A Expired GB410005A (en) 1932-10-08 1933-10-07 Manufacture of a purified cellulose

Country Status (2)

Country Link
US (1) US1967347A (en)
GB (1) GB410005A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2593173A (en) * 1943-10-30 1952-04-15 Enso Gutzeit Oy Process of refining chemical pulp
US3174896A (en) * 1961-12-14 1965-03-23 Rayonier Inc Treatment of spent caustic solution

Also Published As

Publication number Publication date
US1967347A (en) 1934-07-24

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