GB371037A - Improvements in or relating to the manufacture of cellulose or cellulosic compounds - Google Patents

Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Info

Publication number
GB371037A
GB371037A GB630632A GB630632A GB371037A GB 371037 A GB371037 A GB 371037A GB 630632 A GB630632 A GB 630632A GB 630632 A GB630632 A GB 630632A GB 371037 A GB371037 A GB 371037A
Authority
GB
United Kingdom
Prior art keywords
digester
pressure
per cent
temperature
cellulose
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
GB630632A
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.)
Henry Dreyfuss Associates LLC
Original Assignee
Henry Dreyfuss Associates LLC
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 Henry Dreyfuss Associates LLC filed Critical Henry Dreyfuss Associates LLC
Publication of GB371037A publication Critical patent/GB371037A/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
    • D21C3/00Pulping cellulose-containing materials
    • D21C3/22Other features of pulping processes

Landscapes

  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

371,037. Cellulose. DREYFUS, H., 22, Hanover Square, London. Nov. 8, 1930, No. 6306/32. Divided on 371,000. [Class 96.] In a process for producing cellulose or cellulosic materials by treating wood, straw, grasses and the like with hot alkaline liquors under pressure, the treatment is effected in the presence of one or more volatile aliphatic alcohols, which exert a pressure in the digester. Additional pressure may be produced by other means, e.g. by pumping inert gases or vapours into the digester, or by their development from materials introduced into the digester for that purpose. The pressures employed are higher than usual, e.g. 20-100 atmospheres, and the temperature is preferably 100-120‹ C. The alkali is preferably used in excess, e.g. 20-50 per cent excess of the theoretical quantity, and preferably in dilute solution, e.g. 2-4 per cent. In an example 100 parts of wood chips is subjected to vacuum and impregnated with 900-1200 parts of 4 per cent caustic soda. 10-35 parts ethyl or methyl alcohol is added, the digester closed, and nitrogen pumped in until the pressure is 20-25 atmospheres. After 1-2 hours the temperature is raised to 100- 120‹ C. and maintained at that temperature for 3-7 hours.
GB630632A 1930-11-08 1930-11-08 Improvements in or relating to the manufacture of cellulose or cellulosic compounds Expired GB371037A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3365330A GB371000A (en) 1930-11-08 1930-11-08 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Publications (1)

Publication Number Publication Date
GB371037A true GB371037A (en) 1932-04-08

Family

ID=10355690

Family Applications (2)

Application Number Title Priority Date Filing Date
GB630632A Expired GB371037A (en) 1930-11-08 1930-11-08 Improvements in or relating to the manufacture of cellulose or cellulosic compounds
GB3365330A Expired GB371000A (en) 1930-11-08 1930-11-08 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB3365330A Expired GB371000A (en) 1930-11-08 1930-11-08 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Country Status (2)

Country Link
FR (1) FR722430A (en)
GB (2) GB371037A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1042371B (en) * 1952-03-31 1958-10-30 Herbert Kurth Process for the production of powdery lignin for the production of molding compounds in the production of pulp products

Also Published As

Publication number Publication date
GB371000A (en) 1932-04-08
FR722430A (en) 1932-03-16

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