GB864766A - Improvements in or relating to the production of cellulose ethers - Google Patents

Improvements in or relating to the production of cellulose ethers

Info

Publication number
GB864766A
GB864766A GB1163759A GB1163759A GB864766A GB 864766 A GB864766 A GB 864766A GB 1163759 A GB1163759 A GB 1163759A GB 1163759 A GB1163759 A GB 1163759A GB 864766 A GB864766 A GB 864766A
Authority
GB
United Kingdom
Prior art keywords
cellulose
soda
stirred
aqueous solution
reaction vessel
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
GB1163759A
Inventor
Ewald Junge
Ulrich Ostwald
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.)
Dow Produktions und Vertriebs GmbH and Co oHG
Original Assignee
Wolff and Co AG
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 Wolff and Co AG filed Critical Wolff and Co AG
Priority to GB1163759A priority Critical patent/GB864766A/en
Publication of GB864766A publication Critical patent/GB864766A/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

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

Cellulose ethers are made by comminuting cellulose to an average fibre length of less than 1 mm., converting the cellulose into soda cellulose in a reaction vessel by spraying it with a concentrated aqueous solution of sodium hydroxide while it is being stirred, and alkylating the soda cellulose with a gaseous or liquid alkylating agent in the same reaction vessel. In the example, 1 kg. of cellulose ground to a fibre length of 130 microns is sprayed (while being stirred) with a 50% by weight aqueous solution of caustic soda at 50 DEG C. in an autoclave, the free space in which is occupied by nitrogen. The soda cellulose thus formed is then heated to 80 DEG C. and subjected to a constant methyl chloride pressure of 3-5 atm. gauge for 1 hour. The methanol formed is distilled off, the sodium chloride is removed from the crude product and the methyl cellulose is centrifuged and dried. The process reduces the consumption of caustic soda and alkylating agent.
GB1163759A 1959-04-06 1959-04-06 Improvements in or relating to the production of cellulose ethers Expired GB864766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1163759A GB864766A (en) 1959-04-06 1959-04-06 Improvements in or relating to the production of cellulose ethers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1163759A GB864766A (en) 1959-04-06 1959-04-06 Improvements in or relating to the production of cellulose ethers

Publications (1)

Publication Number Publication Date
GB864766A true GB864766A (en) 1961-04-06

Family

ID=9989940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1163759A Expired GB864766A (en) 1959-04-06 1959-04-06 Improvements in or relating to the production of cellulose ethers

Country Status (1)

Country Link
GB (1) GB864766A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117223A (en) * 1976-08-06 1978-09-26 Loedige Wilhelm Process for the preparation of cellulose alkyl ethers
DE2929011A1 (en) * 1979-07-18 1981-02-12 Henkel Kgaa PRODUCTION OF ALKYLCELLULOSE BY CONTINUOUS PROCEDURE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117223A (en) * 1976-08-06 1978-09-26 Loedige Wilhelm Process for the preparation of cellulose alkyl ethers
DE2929011A1 (en) * 1979-07-18 1981-02-12 Henkel Kgaa PRODUCTION OF ALKYLCELLULOSE BY CONTINUOUS PROCEDURE

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