GB534152A - Improvements in and relating to alkali soluble cellulose ethers - Google Patents

Improvements in and relating to alkali soluble cellulose ethers

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Publication number
GB534152A
GB534152A GB2440639A GB2440639A GB534152A GB 534152 A GB534152 A GB 534152A GB 2440639 A GB2440639 A GB 2440639A GB 2440639 A GB2440639 A GB 2440639A GB 534152 A GB534152 A GB 534152A
Authority
GB
United Kingdom
Prior art keywords
cellulose
alkali
salt
water
cellulose ethers
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
GB2440639A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2440639A priority Critical patent/GB534152A/en
Publication of GB534152A publication Critical patent/GB534152A/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

534,152. Cellulose ethers. REICHEL, F. H. Aug. 24, 1939, No. 24406. [Class 2 (ii)] Cellulose ethers are obtained by treating cellulosic material with alkali solution and then subjecting it to the action of an etherifying agent in the presence of a substantial amount of an anhydrous water-soluble inert salt capable of forming hydrates. with water, continuing the reaction until there are introduced into the cellulose sufficient ether groups to render the cellulose ether soluble at 0‹C. in aqueous sodium hydroxide solutions of 3 per cent. or less alkali concentration but insoluble in water, and thereafter discontinuing the reaction. The amount of water-soluble inert salt may be sufficient to combine with all the water present in forming the lowest hydrate of the salt. The salt used may be sodium sulphate, sulphite, carbonate, tetraborate, acetate, or citrate, or potassium carbonate, citrate. lactate, or tetraborate, or lithium acetate, tetraborate, or citrate. The cellulosic material may be cotton, jute, flax, hemp, straw, wood, sulphite cellulose, cotton linters, regenerated cellulose, de-esterified cellulose esters, hydrocellulose, or cellulose ethers of low degree of substitution. Caustic soda, caustic potash, or a quaternary ammonium hydroxide may be used for making the alkali-cellulose. The etherifying agent may be an alkyl halide or sulphate, sodium ethyl sulphate, a chlorohydrin, an alkylene oxide, or halogenated fatty acid. The anhydrous salt may be added at any stage prior to the etherification step. A further amount of the salt may be added to the washing liquids. In an example, pulp sheets made of cotton linters are soaked in caustic soda solution, drained and pressed. After ageing, the alkali cellulose is mixed with anhydrous sodium sulphate whereby the quantity of free water in the mixture is reduced and the alkali is concentrated. Ethylene oxide is then added and the mixture is kept-in motion by revolving the reaction vessel for several hours. The product is acidified and washed. The reaction is carried out so that the cellulose ether contains at least 2 per cent, of hydroxy-ethyl or its equivalent of another ether group. The product may be mixed with viscose, ammoniacal-copper solutions of cellulose, latex, aqueous artificial dispersions of rubber, gums, resins, casein, gelatine, waxes, fats, and oils. To the dilute alkali solutions of the cellulose ethers there may be added plasticizers, dyes, pigments, wetting agents, waterproofing, or fireproofing agents. The cellulose ethers may be used in the production of filaments, films, tubes, capsules, plastic masses, adhesives, stiffening agents for fabrics, coatings, sizings for textiles and paper, and they may be used as thickening and dispersing agents for pigments and dyes for printing and dyeing textiles and paper. Specification 496,122 is referred to.
GB2440639A 1939-08-24 1939-08-24 Improvements in and relating to alkali soluble cellulose ethers Expired GB534152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2440639A GB534152A (en) 1939-08-24 1939-08-24 Improvements in and relating to alkali soluble cellulose ethers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2440639A GB534152A (en) 1939-08-24 1939-08-24 Improvements in and relating to alkali soluble cellulose ethers

Publications (1)

Publication Number Publication Date
GB534152A true GB534152A (en) 1941-02-28

Family

ID=10211241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2440639A Expired GB534152A (en) 1939-08-24 1939-08-24 Improvements in and relating to alkali soluble cellulose ethers

Country Status (1)

Country Link
GB (1) GB534152A (en)

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