METHOD FOR PRODUCTION OF ALKYLHYDROXYALKYL CELLULOSE

FIELD: organic chemistry. ^ SUBSTANCE: invention relates to method for production of alkylhydroxyalkyl cellulose by interaction of cellulose with alkylation agent and hydroxyalkylation agent in presence of alkali, namely: a) cellulose is alkalified with 0.9-2.9 eq of alkali metal hydroxide/AGU intro...

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Bibliographic Details
Main Authors DANNKHORN VOL'FGANG, PANNEK JORN-BERND, SHLEZIGER KHARTVIG, KLOR EHRIK-ANDREHAS, KOVOLLIK MARTIN
Format Patent
LanguageEnglish
Russian
Published 27.10.2007
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:FIELD: organic chemistry. ^ SUBSTANCE: invention relates to method for production of alkylhydroxyalkyl cellulose by interaction of cellulose with alkylation agent and hydroxyalkylation agent in presence of alkali, namely: a) cellulose is alkalified with 0.9-2.9 eq of alkali metal hydroxide/AGU introducing in form of aqueous alkali in presence of suspending agent containing haloalkyl wherein amount of haloalkyl is calculated according to the next formula: from [alkali metal hydroxide total per AGU] to [alkali metal hydroxide total per AGU plus 4.5]; b) alkali cellulose is react with alkylation agent and hydroxyalkylation agent such as one or more alkylene oxide at temperature of 65C or more; c) alkali metal hydroxide is repeatedly added in form of aqueous alkali; and d) alkylhydroxyalkyl cellulose contained in reaction mixture is isolated and optionally purified. ^ EFFECT: mew method for production of alkylhydroxyalkyl cellulose. ^ 7 cl, 36 ex, 8 tbl
Bibliography:Application Number: RU20020119196