GB1131251A - Alkali metal salts of carboxymethyl cellulose - Google Patents

Alkali metal salts of carboxymethyl cellulose

Info

Publication number
GB1131251A
GB1131251A GB4139265A GB4139265A GB1131251A GB 1131251 A GB1131251 A GB 1131251A GB 4139265 A GB4139265 A GB 4139265A GB 4139265 A GB4139265 A GB 4139265A GB 1131251 A GB1131251 A GB 1131251A
Authority
GB
United Kingdom
Prior art keywords
alkali metal
carboxymethyl cellulose
cmc
alkali
chlorites
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
GB4139265A
Inventor
Richard Laighton Evans
Roy Walter Sommers
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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
Priority claimed from US400555A external-priority patent/US3394127A/en
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1131251A publication Critical patent/GB1131251A/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
    • C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
    • 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

1,131,251. Carboxymethyl cellulose. E. I. DU PONT DE NEMOURS & CO. 29 Sept., 1965, No. 41392/65. Heading C3A. An alkali metal salt of carboxymethyl cellulose (CMC) is made by etherifying alkali cellulose in a 2-phase liquid system containing a water miscible aliphatic alcohol, e.g. ethanol, one phase containing aqueous alcohol and the other containing an inert water-immiscible liquid (e.g. benzene)/alcohol mixture, treating the resulting CMC with a bleaching agent to reduce its viscosity, and recovering the alkali metal CMC salt product. Etherification may be effected using wood pulp made alkali with NaOH, and treated with monochloracetic acid. Bleaching agents listed are hydrogen peroxide and the free acid or alkali metal salt forms of peroxides, perborates, periodates, hypohalites or chlorites and they may be used singly or in admixture. Chlorites may be prepared in situ by passing gaseous Cl 2 through the alkaline etherified slurry.
GB4139265A 1964-09-30 1965-09-29 Alkali metal salts of carboxymethyl cellulose Expired GB1131251A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US400555A US3394127A (en) 1964-09-30 1964-09-30 Densification of carboxymethyl cellulose
US41723664A 1964-12-09 1964-12-09

Publications (1)

Publication Number Publication Date
GB1131251A true GB1131251A (en) 1968-10-23

Family

ID=27017089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4139265A Expired GB1131251A (en) 1964-09-30 1965-09-29 Alkali metal salts of carboxymethyl cellulose

Country Status (3)

Country Link
DE (1) DE1468835A1 (en)
GB (1) GB1131251A (en)
NL (2) NL6512687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212625A2 (en) * 1985-08-29 1987-03-04 Hoechst Aktiengesellschaft Process for preparing low-viscosity cellulose ethers
RU2489444C1 (en) * 2012-07-03 2013-08-10 Открытое акционерное общество "Группа "Илим" Method of producing carboxymethyl cellulose

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212625A2 (en) * 1985-08-29 1987-03-04 Hoechst Aktiengesellschaft Process for preparing low-viscosity cellulose ethers
DE3530857A1 (en) * 1985-08-29 1987-03-05 Hoechst Ag METHOD FOR PRODUCING LOW VISCOSIS CELLULOSEETHERS
EP0212625A3 (en) * 1985-08-29 1987-10-28 Hoechst Aktiengesellschaft Process for preparing low-viscosity cellulose ethers
US4894448A (en) * 1985-08-29 1990-01-16 Hoechst Aktiengesellschaft Process for the preparation of low-viscosity cellulose ethers
RU2489444C1 (en) * 2012-07-03 2013-08-10 Открытое акционерное общество "Группа "Илим" Method of producing carboxymethyl cellulose

Also Published As

Publication number Publication date
NL6512687A (en) 1966-03-31
NL6512688A (en) 1966-03-31
DE1468835A1 (en) 1969-01-16

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