GB231807A - Manufacture of cellulose derivatives - Google Patents
Manufacture of cellulose derivativesInfo
- Publication number
- GB231807A GB231807A GB13355/24A GB1335524A GB231807A GB 231807 A GB231807 A GB 231807A GB 13355/24 A GB13355/24 A GB 13355/24A GB 1335524 A GB1335524 A GB 1335524A GB 231807 A GB231807 A GB 231807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- alkali
- halohydrin
- solution
- water
- 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
- C08B11/00—Preparation of cellulose ethers
- C08B11/02—Alkyl or cycloalkyl ethers
- C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
- C08B11/08—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals with hydroxylated hydrocarbon radicals; Esters, ethers, or acetals thereof
Landscapes
- 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)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Cellulose derivatives soluble in aqueous alkalies but insoluble in water and the usual organic solvents, are obtained by acting on cellulose or an alkali-insoluble cellulose conversion product with a halohydrin of a polyalcohol or a derivative or internal anhydride of such halohydrin, in the presence of an alkali solution of not more than 30 per cent strength, preferably up to 25 per cent strength. Halohydrins of glycerol or glycol such as a -monochlorhydrin and ethylene chlorhydrin are suitable; the monohalohydrins are preferred. According as the alkali solution is weaker, so a larger excess of halohydrin is permissible. The derivatives so prepared are distinguished by their inertness, their resistance towards alkalies, their durability, and the flexibility and the transparency of the products made from them; and they are suitable for the manufacture of artificial threads, films, plastic compositions, coatings, finishes for textiles, sizes, thickening-agents for textile printing, and fixing-agents for pigments. The treatment of the cellulose with alkali and halohydrin may be carried out simultaneously or successively in either order; the cellulose may be impregnated or kneaded with the aqueous or alcoholic solution of caustic alkali, and, if necessary, the excess of solution removed; the halohydrin is added in an undiluted state or diluted with water, ether, alcohol, etc.; the reaction proceeds without extraneous supply of heat, although the alkali-cellulose may be heated prior to or during the addition of the halohydrin; contact substances such as copper, silver, iron, or benzoyl superoxide may be added. The reaction mixture may be worked up into technical products after the addition of water or caustic alkali solution in order to effect solution of the cellulose derivative; or the latter may first be isolated by washing with water or aqueous alcohol, with or without previous neutralization or acidification. When working up the products it is convenient to effect fixation by dilute acid or any other precipitating-bath used for viscose. Specifications 166,767, 177,810, 203,346 and 203,347 are referred to. The Specification as open to inspection under Sect. 91 (3) (a) includes the use in the above process of alkali of a strength up to 50 per cent. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT231807X | 1924-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB231807A true GB231807A (en) | 1925-09-30 |
Family
ID=3669953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13355/24A Expired GB231807A (en) | 1924-04-04 | 1924-05-30 | Manufacture of cellulose derivatives |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB231807A (en) |
-
1924
- 1924-05-30 GB GB13355/24A patent/GB231807A/en not_active Expired
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