GB838893A - A process for the production of mechanical wood pulp and newsprint produced therefrom - Google Patents
A process for the production of mechanical wood pulp and newsprint produced therefromInfo
- Publication number
- GB838893A GB838893A GB9358/58A GB935858A GB838893A GB 838893 A GB838893 A GB 838893A GB 9358/58 A GB9358/58 A GB 9358/58A GB 935858 A GB935858 A GB 935858A GB 838893 A GB838893 A GB 838893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulp
- production
- wood pulp
- wood
- mechanical wood
- 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
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
Abstract
838,893. Preparation of paper pulp. DUETSCHE GOLDUND SILBERSCHEIDEANSTALT VORM. ROESSLER. March 24, 1958 [April 5, 1957 (2)], No. 9358/58. Class 96. Wood, for the production of mechanical wood pulp, is treated prior to or during grinding, with an alkaline solution of peroxidic compounds which yield oxygen, e.g. hydrogen peroxide, or sodium peroxide, perborate, percarbonate, or perphosphate, together with e.g. caustic soda, alkali silicates, and wetting agents &c. There may be 0.2 to 1.2 parts of active oxygen per 100 of dry wood, and the pH value may be maintained at e.g. 12 to 13, e.g. until after thickening, when the pulp is neutralized with sulphuric acid. Kaolin, dye, resin size, and alum may be added to the mechanical wood pulp thus made. Preferably appreciable bleaching does not occur. The pulp may be used alone or with some cellulose.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE838893X | 1957-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB838893A true GB838893A (en) | 1960-06-22 |
Family
ID=6761778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9358/58A Expired GB838893A (en) | 1957-04-05 | 1958-03-24 | A process for the production of mechanical wood pulp and newsprint produced therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB838893A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2601380A1 (en) * | 1975-01-27 | 1976-07-29 | Elektrokemiska Ab | Process for the production of bleached mechanical pulp |
| US4187141A (en) * | 1975-02-24 | 1980-02-05 | Alf Societe Anonyme | Method of producing bleached mechanical pulp |
-
1958
- 1958-03-24 GB GB9358/58A patent/GB838893A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2601380A1 (en) * | 1975-01-27 | 1976-07-29 | Elektrokemiska Ab | Process for the production of bleached mechanical pulp |
| US4187141A (en) * | 1975-02-24 | 1980-02-05 | Alf Societe Anonyme | Method of producing bleached mechanical pulp |
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