GB572868A - Improvements in or relating to a process for preparing alkali-metal salts of the glycollic acid ether of cellulose - Google Patents

Improvements in or relating to a process for preparing alkali-metal salts of the glycollic acid ether of cellulose

Info

Publication number
GB572868A
GB572868A GB13386/43A GB1338643A GB572868A GB 572868 A GB572868 A GB 572868A GB 13386/43 A GB13386/43 A GB 13386/43A GB 1338643 A GB1338643 A GB 1338643A GB 572868 A GB572868 A GB 572868A
Authority
GB
United Kingdom
Prior art keywords
cellulose
alkali
water
acid
acid ether
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
GB13386/43A
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.)
Oel & Chemie Werk A G
Original Assignee
Oel & Chemie Werk A G
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 Oel & Chemie Werk A G filed Critical Oel & Chemie Werk A G
Publication of GB572868A publication Critical patent/GB572868A/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
    • C08B11/00—Preparation of cellulose ethers
    • C08B11/02—Alkyl or cycloalkyl ethers
    • C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
    • C08B11/10—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
    • C08B11/12—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals substituted with carboxylic radicals, e.g. carboxymethylcellulose [CMC]

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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Alkali-metal salts of cellulose glycollic acid ether which are soluble or form colloidal solutions in water, are prepared by treating cellulose with monochloracetic acid or an alkali metal salt thereof in an excess of alkali hydroxide and a quantity of water not exceeding double the weight of the dry cellulose, the chloracetic acid or its salt being present in an amount between 50 to 100 parts per 100 parts of cellulose, and the mixture being heated for some time at 50-100 DEG C. Mechanical means are employed to thoroughly mix the reactants and to triturate the cellulosic material, the two operations being effected in one stage by treatment in a de-fibring device, or in two stages by treatment in a mixing and kneading apparatus followed by a crushing apparatus. In an example, cellulose is treated with sodium hydroxide and water in a mixing apparatus to which is subsequently added an aqueous solution of monochloracetic acid neutralized with sodium carbonate. The product is then passed through a crushing apparatus and subsequently heated for some hours at 80 DEG C. The product may be purified by washing with alcohol, or by forming the free glycollic acid ether, washing with water and neutralizing with alkali. Reference has been directed by the Comptroller to Specifications 138,116, [Class 2 (ii)], 469,901 and 482,885.
GB13386/43A 1942-08-18 1943-08-17 Improvements in or relating to a process for preparing alkali-metal salts of the glycollic acid ether of cellulose Expired GB572868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH572868X 1942-08-18

Publications (1)

Publication Number Publication Date
GB572868A true GB572868A (en) 1945-10-26

Family

ID=4521022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13386/43A Expired GB572868A (en) 1942-08-18 1943-08-17 Improvements in or relating to a process for preparing alkali-metal salts of the glycollic acid ether of cellulose

Country Status (1)

Country Link
GB (1) GB572868A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542215A (en) * 1949-07-30 1951-02-20 Wyandotte Chemicals Corp Method of making carboxymethylcellulose of improved soil suspending properties
US2711407A (en) * 1951-04-17 1955-06-21 American Viscose Corp Production of salts of carboxyalkyl cellulose

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542215A (en) * 1949-07-30 1951-02-20 Wyandotte Chemicals Corp Method of making carboxymethylcellulose of improved soil suspending properties
US2711407A (en) * 1951-04-17 1955-06-21 American Viscose Corp Production of salts of carboxyalkyl cellulose

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