GB410005A - Manufacture of a purified cellulose - Google Patents
Manufacture of a purified celluloseInfo
- Publication number
- GB410005A GB410005A GB27669/33A GB2766933A GB410005A GB 410005 A GB410005 A GB 410005A GB 27669/33 A GB27669/33 A GB 27669/33A GB 2766933 A GB2766933 A GB 2766933A GB 410005 A GB410005 A GB 410005A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- treated
- cellulose
- hours
- manufacture
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
Abstract
In the manufacture of cellulose of high a -cellulose content, a pulp obtained by any opening up treatment is subjected in a moist state to a chlorination and is then treated with caustic alkali of 5--10 per cent strength with simultaneous introduction of gaseous chlorine in the cold or at a raised temperature. Air dried beechwood shavings are treated with dilute nitric acid for about 12 hours at 30 DEG C. The excess acid is removed, and the mass treated with water or with dilute nitric acid (up to 1 per cent strong) at 70--80 DEG C. for 5--6 hours. The cellulose thus obtained is treated with 2.5 per cent of chlorine, washed with very weak alkali and treated at 60 DEG C. for 1--2 hours, in a liquor adjusted to contain 9 per cent of caustic soda and 6 per cent of cellulose, with 2 per cent of gaseous chlorine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE410005X | 1932-10-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB410005A true GB410005A (en) | 1934-05-10 |
Family
ID=6422518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27669/33A Expired GB410005A (en) | 1932-10-08 | 1933-10-07 | Manufacture of a purified cellulose |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1967347A (en) |
| GB (1) | GB410005A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2593173A (en) * | 1943-10-30 | 1952-04-15 | Enso Gutzeit Oy | Process of refining chemical pulp |
| US3174896A (en) * | 1961-12-14 | 1965-03-23 | Rayonier Inc | Treatment of spent caustic solution |
-
1933
- 1933-10-03 US US692038A patent/US1967347A/en not_active Expired - Lifetime
- 1933-10-07 GB GB27669/33A patent/GB410005A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1967347A (en) | 1934-07-24 |
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