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 compoundsInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9644317B2 (en) | 2014-11-26 | 2017-05-09 | International Paper Company | Continuous digester and feeding system |
-
1930
- 1930-11-11 GB GB33966/30A patent/GB371001A/en not_active Expired
- 1930-11-11 GB GB6307/32A patent/GB371038A/en not_active Expired
Cited By (1)
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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