GB764045A - Refining of wood pulp - Google Patents
Refining of wood pulpInfo
- Publication number
- GB764045A GB764045A GB1507/55A GB150755A GB764045A GB 764045 A GB764045 A GB 764045A GB 1507/55 A GB1507/55 A GB 1507/55A GB 150755 A GB150755 A GB 150755A GB 764045 A GB764045 A GB 764045A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- pulp
- slurry
- content
- minutes
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
- C08B1/08—Alkali cellulose
-
- 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
- D21C9/086—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 organic compounds or compositions comprising organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
In the refining of wood pulp, the pulp is treated with a hot caustic alkali solution containing tall oil and a non-ionic detergent comprising a polyglycol ether of an alkyl-phenol. The treatment reduces the resinous content of the resulting cellulose, and is preferably effected after the normal chlorinating and bleaching steps in the sulphite process. The treatment is preferably effected on the pulp as a slurry having 2-20 per cent dry pulp content with a solution containing 3-25 per cent sodium hydroxide, 0.1-5 per cent tall oil and 0.1-1 per cent non-ionic detergent at 80-170 DEG C. for 10-240 minutes. In an example, sulphite wood pulp which had been chlorinated and bleached was formed into a slurry containing 8 per cent pulp with an aqueous solution containing 12 per cent sodium hydroxide. To the slurry was added 0.3 per cent of the mixed ether obtained by condensing nonyl-phenol with ethylene oxide in a molar ratio of 1:10, and 1 per cent of tall oil comprising 66-71 per cent fatty acids, 25-30 per cent rosin acids and 2-4 per cent of sterols and the like. The slurry was heated to 140 DEG C. in 25 minutes and maintained at that temperature for 20 minutes. The pulp was then washed and scoured with aqueous sulphur dioxide solution to a pH value of 5.5. Its alpha-cellulose content and viscosity were high whereas its content of material soluble in an alcohol/benzene mixture had been reduced to 0.03 per cent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US405043A US2789902A (en) | 1954-01-19 | 1954-01-19 | Refining of wood pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB764045A true GB764045A (en) | 1956-12-19 |
Family
ID=23602055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1507/55A Expired GB764045A (en) | 1954-01-19 | 1955-01-18 | Refining of wood pulp |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2789902A (en) |
| GB (1) | GB764045A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3446700A (en) * | 1966-03-07 | 1969-05-27 | Diamond Shamrock Corp | Process for cooking woodchips with a liquor containing condensation product of vicinal epoxide and phenol |
| US4210747A (en) * | 1976-03-10 | 1980-07-01 | Kemira Oy | Process for the preparation of viscose |
| FI53144C (en) * | 1976-03-10 | 1978-02-10 | Kemira Oy |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1833976A (en) * | 1931-12-01 | George a | ||
| US1847311A (en) * | 1927-08-10 | 1932-03-01 | Brown Co | Processing of cellulose fiber |
| US2128928A (en) * | 1932-06-29 | 1938-09-06 | Weston Allen J | Art of fiber liberation |
| US2213477A (en) * | 1935-12-12 | 1940-09-03 | Gen Aniline & Film Corp | Glycol and polyglycol ethers of isocyclic hydroxyl compounds |
| DE740664C (en) * | 1939-10-22 | 1944-03-31 | Ig Farbenindustrie Ag | Process for the production of white paper stock from waste paper |
| US2596092A (en) * | 1950-03-28 | 1952-05-13 | Rohm & Haas | Bis alkylbenzyl ethers of polyethylene glycols |
-
1954
- 1954-01-19 US US405043A patent/US2789902A/en not_active Expired - Lifetime
-
1955
- 1955-01-18 GB GB1507/55A patent/GB764045A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2789902A (en) | 1957-04-23 |
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