Title:
アルキルヒドロキシアルキルセルロースの製造方法
Document Type and Number:
Japanese Patent JP5283294
Kind Code:
B2
Abstract:
Production of alkylhydroxyalkyl cellulose by the reaction of cellulose with alkyl halides in the presence of alkali and at least one alkylene oxide, is new. A process for the production of alkylhydroxyalkyl cellulose by the reaction of cellulose in the presence of alkali with alkyl halides and at least one alkylene oxide comprises: (a) mixing cellulose with 1.5-5.5 equivalents of alkali hydroxide per AGU (anhydroglucose unit) as an aqueous solution in the presence of a suspension agent which contains an amount of alkyl halide ranging from equivalents alkali hydroxide per AGU of -1.4 to +0.8 (b) reaction of the alkali treated cellulose with alkylene oxide at above 65 degrees C (c) additional dosing of alkyl halide in an amount of at least the difference between the amount of alkyl halide per AGU already added and the amount of alkyl halide per AGU to be added whereby this amount is at least 0.2 equivalents per AGU and (d) isolating the resulting alkalihydroxyalkylcellulose from the reaction mixture and optional purification.
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Inventors:
Wolfgang Dunhorn
Hartwig Schillegger
Yern-Bernd Panek
Gerolf Weissbach
Hartwig Schillegger
Yern-Bernd Panek
Gerolf Weissbach
Application Number:
JP2001234595A
Publication Date:
September 04, 2013
Filing Date:
August 02, 2001
Export Citation:
Assignee:
Dow Global Technologies LLC
International Classes:
C08B11/08; C08B11/193
Domestic Patent References:
| JP10158302A | ||||
| JP60255801A | ||||
| JP4227701A |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office
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