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2 307 127

(13)

(51)

IPC

C08B11/12(2006-01-01)

(21) (22)

Application

2005119671/04, 2005-06-24

(24)

Start date

2005-06-24

(22)

Actual filing date

2005-06-24

(45)

Published

2007-09-27

(72)

Inventor

Davydova Valentina IvanovnaTitova Valentina Vasil'EvnaShirokov Viktor Aleksandrovich

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

METHOD FOR PRODUCTION OF CARBOXYMETHYL CELLULOSE SODIUM SALT Russian patent published in 2007 - IPC C08B11/12

Abstract RU 2307127 C2

FIELD: production of carboxymethyl cellulose (CMC) sodium salt useful as thickening agent and emulsifier in paper, textile and petroleum industry.

SUBSTANCE: claimed method includes cellulose treatment with sodium hydroxide aqueous solution to produce alkali cellulose, wherein in sodium hydroxide aqueous solution (100 mass pts) low molecular polyether based on ethylene oxide or propylene oxide (1.0-2.5 mass pts) is introduced and for cellulose treatment sodium hydroxide aqueous solution in concentration of 19.5-23.0 % at temperature 50-60°C is used, and process is carried out for 2.5-3.0 h at 30-45°C.

EFFECT: CMC aqueous solutions with decreased viscosity.

4 cl, 1 tbl, 8 ex

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RU 2 307 127 C2

Authors

Davydova Valentina Ivanovna

Titova Valentina Vasil'Evna

Shirokov Viktor Aleksandrovich

Dates

2007-09-27—Published

2005-06-24—Filed