Process for the preparation of alkali salt of carboxy alkyl cell

Details Process for the preparation of alkali salt of carboxy alkyl cell Process for the preparation of alkali salt of carboxy alkyl cell

1997-01-17

1998-09-01

Kight, John

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

Organic compounds

Carbohydrates or derivatives

536 56, 536 84, 536 97, 536 98, 536101, C07H 100, C08B 1112, C08B 1100, C08B 1505

Patent

active

058012397

ABSTRACT:
This invention relates to a process for the preparation of alkali salt of carboxyalkyl cellulose with good solubility in salt water which is useful for pertroleum drilling muds, which comprises (a) powdering high alpha cellulose obtained from fast growing plants or bamboo pulp, (b) preparing the alkali metal salt of cellulose by mixing the high alpha cellulose pulp obtained from fast growing plant or bamboo with an alkalinating agent in the presence of an inert organic solvent, (c) etherifying the prepared alkali cellulose to alkali metal salt of cellulose with an etherifying agent at a temperature in the range of 70.degree.-80.degree. C., (d) recovering the alkali metal salt of carboxyalkyl cellulose and (e) drying the resulting alkali metal salt of carboxalkyl cellulose.

REFERENCES:
patent: 3374224 (1968-03-01), Sommers

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