GB583074A - Improvements relating to processes for the production of cellulose pulp - Google Patents
Improvements relating to processes for the production of cellulose pulpInfo
- Publication number
- GB583074A GB583074A GB1273144A GB1273144A GB583074A GB 583074 A GB583074 A GB 583074A GB 1273144 A GB1273144 A GB 1273144A GB 1273144 A GB1273144 A GB 1273144A GB 583074 A GB583074 A GB 583074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- straw
- acid
- treated
- effluent
- boiled
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
Abstract
Cellulosic vegetable material is pre-treated with a dilute solution of an acid or an acid salt and is then digested with the alkaline effluent from an alkaline pulping process. The acid solution used may be a waste sulphite effluent, the pH value of which has been reduced to 1 to 1.5 by the addition of an acid or acid salt. Straw and wood are suitable cellulosic materials. In an example, straw is pre-treated with a boiling solution of sodium bisulphate of 1.5 per cent concentration in a ratio 1 : 8, washed and boiled with ten times its amount of wash water of 8 DEG Tw. obtained from a straw boil using 20 per cent caustic soda in a ratio 1 : 4.5. In a second example, straw is pre-treated with boiling sulphite effluent having a density of 12 DEG Tw. and a pH adjusted to 1 to 1.5, and is then boiled with black liquor from a straw pressure boil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1273144A GB583074A (en) | 1945-03-07 | 1945-03-07 | Improvements relating to processes for the production of cellulose pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1273144A GB583074A (en) | 1945-03-07 | 1945-03-07 | Improvements relating to processes for the production of cellulose pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB583074A true GB583074A (en) | 1946-12-06 |
Family
ID=10010054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1273144A Expired GB583074A (en) | 1945-03-07 | 1945-03-07 | Improvements relating to processes for the production of cellulose pulp |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB583074A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2747995A (en) * | 1952-03-12 | 1956-05-29 | Rayonier Inc | Method of pulp production |
| WO2004106624A1 (en) * | 2003-06-03 | 2004-12-09 | Pacific Pulp Resources Inc. | Method for producing pulp and lignin |
| WO2007065241A1 (en) * | 2005-12-07 | 2007-06-14 | Kelly Anthony O'flynn | A novel catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
-
1945
- 1945-03-07 GB GB1273144A patent/GB583074A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2747995A (en) * | 1952-03-12 | 1956-05-29 | Rayonier Inc | Method of pulp production |
| WO2004106624A1 (en) * | 2003-06-03 | 2004-12-09 | Pacific Pulp Resources Inc. | Method for producing pulp and lignin |
| WO2007065241A1 (en) * | 2005-12-07 | 2007-06-14 | Kelly Anthony O'flynn | A novel catalytic reactor process for the production of commercial grade pulp, native lignin and unicellular protein |
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