发明名称 |
METHOD FOR PREPARING CARBOXYMETHYLCELLULOSE SODIUM SALT |
摘要 |
FIELD: chemical technology. SUBSTANCE: invention relates to technology of synthesis of cellulose ethers. Carboxymethylcellulose sodium salt is prepared by activation of cellulose with alkali aqueous solution, etherification with monochloro- acetic acid or its salt and drying. In activation process substances are added to cellulose in the amount from 0.05 to 1 g per 1 kg of cellulose and these substance are taken among group including: neonol as mixture of monoalkylphenol polyethylene glycol esters; OP-10 as mixture of mono- and dialkylphenol polyethylene glycol esters; syntanol as mixture of higher alcohol polyethylene glycol esters; proxanol as mixture of higher alcohol polyethylene- and polypropylene glycol esters; oxal as mixture of hydroxy- and alkoxy-derivatives of dioxane; DISAFEN as mixture of monoalkylphenol polyethylene glycol esters and hydroxy- and alkoxy-derivatives of dioxane; polyethylene glycol of average molecular mass 1200 Da; polypropylene glycol with average molecular mass 1200 Da. Invention allows to increase value of substitution degree of carboxymethylcellulose sodium salt. EFFECT: improved preparing method. 1 tbl, 13 ex
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申请公布号 |
RU2204567(C2) |
申请公布日期 |
2003.05.20 |
申请号 |
RU20000130372 |
申请日期 |
2000.12.05 |
申请人 |
OAO "NIZHEGORODSKIJ ZAVOD OKTJABR'";TIKHOMIROV ALEKSANDR VJACHESLAVOVICH |
发明人 |
AKULININ V.A.;BULANOV R.A.;DOMNIN V.O.;ZHEVTYJ N.N.;NUSINOVICH D.S.;SUPYREV A.V.;TIKHOMIROV A.V.;JARULLIN R.N. |
分类号 |
C08B11/12 |
主分类号 |
C08B11/12 |
代理机构 |
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