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 compoundsInfo
- 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
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)
- 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.
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)
| 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 |
-
1930
- 1930-11-08 GB GB630632A patent/GB371037A/en not_active Expired
- 1930-11-08 GB GB3365330A patent/GB371000A/en not_active Expired
-
1931
- 1931-09-03 FR FR722430D patent/FR722430A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB371000A (en) | 1932-04-08 |
| FR722430A (en) | 1932-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB416549A (en) | Improvements in the manufacture of cellulose and lignocellulosic materials | |
| GB1236910A (en) | A process for the manufacture of xylose and xylitol | |
| GB357821A (en) | Process of decomposing vegetable fibrous substances for the purpose of obtaining simultaneously the cellulose and the incrusting ingredients | |
| GB427626A (en) | Improvements in or relating to the manufacture of cellulose | |
| GB371037A (en) | Improvements in or relating to the manufacture of cellulose or cellulosic compounds | |
| GB371038A (en) | Improvements in or relating to the manufacture of cellulose or cellulosic compounds | |
| GB438435A (en) | Improvements in the treatment of cellulosic materials | |
| GB438436A (en) | Improvements in the production of cellulose and cellulosic products | |
| GB400974A (en) | Improvements in or relating to the production of cellulosic materials or cellulose | |
| GB459531A (en) | Improvements in or relating to the manufacture of cellulose | |
| GB518887A (en) | A process for the production of pulp material from wood, straw, grasses and similar cellulose containing plants | |
| GB414751A (en) | Improvements in or relating to the treatment of lignocellulosic material and products obtained therefrom | |
| ES456679A1 (en) | Process for the preparation of alkali cellulose | |
| GB237685A (en) | Improvements in, or relating to, the preparation of alkali celluloses | |
| GB343429A (en) | Improvements in or relating to the process of producing cellulosic pulp | |
| DE522575C (en) | Process for the production of cellulose ethers | |
| GB438433A (en) | Improvements in the manufacture of cellulose | |
| GB442020A (en) | Improvements in the production of cellulose | |
| GB572728A (en) | Improvements in and relating to the production of cellulose from lignin-containing cellulosic material | |
| King et al. | STUDIES ON LIGNIN AND RELATED COMPOUNDS: XX. METHANOL LIGNIN AND ITS RELATION TO THE SO-CALLED" PRIMARY LIGNIN" OF FRIEDRICH AND DIWALD | |
| GB240174A (en) | An improved process for the manufacture of artificial horn from proteins or albuminous substances | |
| Fukuda et al. | Fundamental Studies on the Process of Wood Cooking Summary of the First Part | |
| GB343147A (en) | Process for the manufacture of soluble ethers from vegetable materials | |
| GB217095A (en) | A process for hardening wood | |
| ES226988A3 (en) | Procedure for the treatment of wood fibers (Machine-translation by Google Translate, not legally binding) |