GB944297A - Process for the manufacture of cellulose - Google Patents

Process for the manufacture of cellulose

Info

Publication number
GB944297A
GB944297A GB2927660A GB2927660A GB944297A GB 944297 A GB944297 A GB 944297A GB 2927660 A GB2927660 A GB 2927660A GB 2927660 A GB2927660 A GB 2927660A GB 944297 A GB944297 A GB 944297A
Authority
GB
United Kingdom
Prior art keywords
sodium hydroxide
weight
concentration
hydroxide solution
hemicellulose
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
GB2927660A
Inventor
Alfons Bayerl
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.)
Filmfabrik Wolfen VEB
Original Assignee
Filmfabrik Wolfen VEB
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 Filmfabrik Wolfen VEB filed Critical Filmfabrik Wolfen VEB
Priority to GB2927660A priority Critical patent/GB944297A/en
Publication of GB944297A publication Critical patent/GB944297A/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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

Cellulose is made by alkaline digestion of lignocellulosic material without preliminary hydrolysis, using an aqueous sodium hydroxide solution containing hemicellulose, and containing 1-13% by weight of sodium sulphide (Na2S), based on the weight of the sodium hydroxide. Solutions obtained in mercerising, containing 2-4% w/v hemicellulose, may be used, and the sodium sulphide concentration is desirably 4-10% by weight. Dry wood is the preferred lignocellulosic material, and the weight of sodium hydroxide used may be 13-20% by weight based on the weight of bonedry wood. The process may be effected in a single digestion phase, suitably using a sodium hydroxide solution of concentration not greater than 5% w/v, or in two phases, namely an impregnation phase carried out at atmospheric pressure and at a temperature below 100 DEG C., using preferably a sodium hydroxide solution of concentration 7-9% w/v, followed by a digestion phase, using preferably a sodium hydroxide solution of concentration not greater than 5% w/v, and in which after draining the pulp, hot water is added to restore the original liquor:wood ratio. The impregnation liquor thus removed may be restored to its original concentration of sodium hydroxide, hemicellulose and sodium sulphide and re-used. The pulp obtained may be used in paper making, or, after conventional chlorination and after-bleaching, for textile purposes.
GB2927660A 1960-08-24 1960-08-24 Process for the manufacture of cellulose Expired GB944297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2927660A GB944297A (en) 1960-08-24 1960-08-24 Process for the manufacture of cellulose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2927660A GB944297A (en) 1960-08-24 1960-08-24 Process for the manufacture of cellulose

Publications (1)

Publication Number Publication Date
GB944297A true GB944297A (en) 1963-12-11

Family

ID=10288976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2927660A Expired GB944297A (en) 1960-08-24 1960-08-24 Process for the manufacture of cellulose

Country Status (1)

Country Link
GB (1) GB944297A (en)

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