GB764045A - Refining of wood pulp - Google Patents

Refining of wood pulp

Info

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
Application number
GB1507/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Celanese Corp
Columbia Cellulose Co Ltd
Original Assignee
Celanese Corp
Columbia Cellulose Co Ltd
Celanese Corp of America
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Celanese Corp, Columbia Cellulose Co Ltd, Celanese Corp of America filed Critical Celanese Corp
Publication of GB764045A publication Critical patent/GB764045A/en
Expired legal-status Critical Current

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

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.
GB1507/55A 1954-01-19 1955-01-18 Refining of wood pulp Expired GB764045A (en)

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)

* Cited by examiner, † Cited by third party
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
FI53144C (en) * 1976-03-10 1978-02-10 Kemira Oy
US4210747A (en) * 1976-03-10 1980-07-01 Kemira Oy Process for the preparation of viscose

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US2789902A (en) 1957-04-23

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