GB371038A - 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
GB371038A
GB371038A GB6307/32A GB630732A GB371038A GB 371038 A GB371038 A GB 371038A GB 6307/32 A GB6307/32 A GB 6307/32A GB 630732 A GB630732 A GB 630732A GB 371038 A GB371038 A GB 371038A
Authority
GB
United Kingdom
Prior art keywords
digester
per cent
pressure
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
GB6307/32A
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
Priority claimed from GB3365330A external-priority patent/GB371000A/en
Application filed by Henry Dreyfuss Associates LLC filed Critical Henry Dreyfuss Associates LLC
Priority to GB33966/30A priority Critical patent/GB371001A/en
Priority to GB6307/32A priority patent/GB371038A/en
Publication of GB371038A publication Critical patent/GB371038A/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
    • D21C3/22—Other features of pulping processes

Landscapes

  • Paper (AREA)

Abstract

371,038. Cellulose. DREYFUS, H., 22, Hanover Square, London. Nov. 11, 1930, No. 6307/32. Divided on 371,001. [Class 96.] In a process for producing cellulose or cellulosic materials by treating wood, straw, grass or the like with hot acid 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. In an example wood chips are subjected to vacuum and impregnated with 10-20 times their weight of a sulphite cooking liquor containing 3-4 per cent total SO2 of which about 1-8-2-8 per cent is free and about 1-2 per cent is combined. 10-35 per cent of the weight of the wood in ethyl or methyl alcohol is added, the digester closed, and nitrogen pumped in until the pressure is 15- 25 atmospheres. After 1-2 hours the temperature is raised to 110-120‹ C. and maintained at that temperature for 16-24 hours.
GB6307/32A 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds Expired GB371038A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB33966/30A GB371001A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds
GB6307/32A GB371038A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Applications Claiming Priority (2)

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
GB6307/32A GB371038A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Publications (1)

Publication Number Publication Date
GB371038A true GB371038A (en) 1932-04-11

Family

ID=32964046

Family Applications (2)

Application Number Title Priority Date Filing Date
GB33966/30A Expired GB371001A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds
GB6307/32A Expired GB371038A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB33966/30A Expired GB371001A (en) 1930-11-08 1930-11-11 Improvements in or relating to the manufacture of cellulose or cellulosic compounds

Country Status (1)

Country Link
GB (2) GB371001A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594130A (en) * 1978-11-27 1986-06-10 Chang Pei Ching Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9644317B2 (en) 2014-11-26 2017-05-09 International Paper Company Continuous digester and feeding system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594130A (en) * 1978-11-27 1986-06-10 Chang Pei Ching Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst

Also Published As

Publication number Publication date
GB371001A (en) 1932-04-11

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