GB507696A - Process for producing pine wood white mechanical wood pulp - Google Patents
Process for producing pine wood white mechanical wood pulpInfo
- Publication number
- GB507696A GB507696A GB1131938A GB1131938A GB507696A GB 507696 A GB507696 A GB 507696A GB 1131938 A GB1131938 A GB 1131938A GB 1131938 A GB1131938 A GB 1131938A GB 507696 A GB507696 A GB 507696A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wood
- grinding
- wood pulp
- april
- earth metal
- 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
-
- 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
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical agents
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
507,696. Grinding wood. BEYER, P., and PRIMAVESI, O. April 13, 1938, No. 11319. Convention date, April '28, 1937. [Class 59] [Also in Group VIII] In the production of wood pulp for paper making by wet grinding pine wood a soluble salt of an alkaline earth metal, e.g. calcium chloride, is incorporated during the grinding and an alkali metal phosphate, e.g. trisodium phosphate, is incorporated immediately after the grinding thereby converting the resin of the wood into an insoluble compound which remains as a filler in the paper. The grinding water is preferably maintained alkaline by the addition of soda &c. If the wood pulp is to be subsequently bleached the alklaline earth metal salt may be added in excess.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB178290D DE667149C (en) | 1937-04-29 | 1937-04-29 | Process for the production of pinewood tweak |
Publications (1)
Publication Number | Publication Date |
---|---|
GB507696A true GB507696A (en) | 1939-06-20 |
Family
ID=25944872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1131938A Expired GB507696A (en) | 1937-04-29 | 1938-04-13 | Process for producing pine wood white mechanical wood pulp |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE667149C (en) |
FR (1) | FR835620A (en) |
GB (1) | GB507696A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE442479A (en) * | 1940-08-19 |
-
1937
- 1937-04-29 DE DEB178290D patent/DE667149C/en not_active Expired
-
1938
- 1938-03-23 FR FR835620D patent/FR835620A/en not_active Expired
- 1938-04-13 GB GB1131938A patent/GB507696A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR835620A (en) | 1938-12-27 |
DE667149C (en) | 1938-11-05 |
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