Process for the production of hydroxyalkyl methyl celluloses

Details Process for the production of hydroxyalkyl methyl celluloses Process for the production of hydroxyalkyl methyl celluloses

1984-02-13

1985-04-02

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 90, 536 95, 536 96, C08B 11193, C08B 1108

Patent

active

045088950

ABSTRACT:
A process for the production of water-soluble hydroxyalkyl methyl cellulose by the alkalization of the cellulose with sodium hydroxide and by subsequent etherification with alkylene oxide in an inert solvent, characterized in that before etherification, the alkali content of the aqueous alkali cellulose is reduced to 0.3-0.8 mols of NaOH/mol of cellulose by washing out with a suitable, known solvent (mixture), and is then etherified with an alkylene oxide in the liquid phase.

REFERENCES:
patent: Re24116 (1956-01-01), Klug
patent: 2137343 (1938-11-01), Maxwell
patent: 3032549 (1962-05-01), Mitchell
patent: 3131176 (1964-04-01), Klug
patent: 3453261 (1969-07-01), Scherff
patent: 3709876 (1973-01-01), Glomski et al.
Chemical Abstracts, vol. 65, No. 9, Oct. 24, 1966, Abstract No. 65: 13947b.

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