Title:
MANUFACTURE OF HIGHLY SUBSTITUTED CARBOXYALKYL CELLULOSES AND MIXED ETHERS
Document Type and Number:
Japanese Patent JPS59145201
Kind Code:
A
Abstract:
A process for the production of carboxyalkyl celluloses having an average degree of substitution of at least 1.0. The process comprises up to 3 stages, but without any intermediate purification. The preferred suspension medium is isopropanol. In each stage of the process, the carboxyalkylating agent is used in quantities of less than 2.5 moles per mole of anhydroglucose unit and the alkylating agent in quantities of less than 5 moles per mole of anhydroglucose unit. The total water content of the system throughout the reaction as a whole must not exceed 450% by weight, based on the quantity by weight of cellulose used. Water contents of from 80 to 250% by weight are preferred.
Inventors:
BUIRUFURIITO REEZE
NORUBERUTO KUIINE
BUIRII BUIISUTO
KONRAATO ENGERUSUKIRUHIEN
NORUBERUTO KUIINE
BUIRII BUIISUTO
KONRAATO ENGERUSUKIRUHIEN
Application Number:
JP1691784A
Publication Date:
August 20, 1984
Filing Date:
January 31, 1984
Export Citation:
Assignee:
HENKEL KGAA
International Classes:
C08B11/12; C08B11/193; (IPC1-7): C08B11/12; C08B11/193
Domestic Patent References:
| JPS58176202A | 1983-10-15 | |||
| JPS55152701A | 1980-11-28 | |||
| JPS5329357A | 1978-03-18 |
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)
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