GB538185A - Improvements relating to the production of cellulose - Google Patents
Improvements relating to the production of celluloseInfo
- Publication number
- GB538185A GB538185A GB28345/39A GB2834539A GB538185A GB 538185 A GB538185 A GB 538185A GB 28345/39 A GB28345/39 A GB 28345/39A GB 2834539 A GB2834539 A GB 2834539A GB 538185 A GB538185 A GB 538185A
- Authority
- GB
- United Kingdom
- Prior art keywords
- treated
- solution
- subjected
- aluminium
- caustic soda
- 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
- D21C3/222—Use of compounds accelerating the pulping processes
Landscapes
- Paper (AREA)
Abstract
538,185. Refining cellulosic materials. HIGGINS, E. B. Oct. 20, 1939, No. 28345. Convention date, Oct. 20, 1938. [Class 2 (ii)] Wood, straw, or the like non-textile vegetable material of cellulose having a low content of resin, lignin, and other impurities or pulp made therefrom is treated with a solution of caustic soda or other alkali in which is incorporated a dispersing agent and a quantity of a metal hydroxide capable of separating the resin matter and other accompanying substances from the material treated. The metal hydroxide added to the alkali solution may be aluminium or calcium hydroxide. Aluminium hydroxide or sodium aluminate may be added as such to the caustic soda solution or may be formed in situ by adding aluminium oxide or a soluble aluminium salt, e.g. the sulphate. The wood or other starting material may be subjected to a chemical pulping operation before being subjected to the process of the invention. Sulphite, sulphate, or soda pulps may be treated. The treated material is suitable for the production of artificial silk by the viscose, acetate, or other processes. The dispersing agent may be sulphonated castor or other sulphonated oil. In an example, a sulphite wood pulp is boiled under pressure with a solution of caustic soda, " Monopol soap (Registered Trade Mark), and sodium aluminate. It may subsequently be subjected to a bleaching treatment. Specification 339,850, [Class 2 (ii)], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR844945T | 1938-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB538185A true GB538185A (en) | 1941-07-24 |
Family
ID=9312642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28345/39A Expired GB538185A (en) | 1938-10-20 | 1939-10-20 | Improvements relating to the production of cellulose |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR844945A (en) |
| GB (1) | GB538185A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1139730B (en) * | 1958-10-24 | 1962-11-15 | Dr Paul Lagally | Process for the manufacture of cellulosic pulp products of high wet strength |
| DE1130271B (en) * | 1960-10-28 | 1962-05-24 | Hoechst Ag | Process for improving the retention of mineral fillers in the formation of paper webs |
-
1938
- 1938-10-20 FR FR844945D patent/FR844945A/en not_active Expired
-
1939
- 1939-10-20 GB GB28345/39A patent/GB538185A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR844945A (en) | 1939-08-04 |
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