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, addition of carboxymethylating agent, agitation and drying 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 of 20-25°C is used, and process is carried out for 2.5-3.0 h at 25-35°C.
EFFECT: CMC aqueous solutions with decreased viscosity and increased substitution ratio.
3 cl, 1 tbl, 8 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCTION OF CARBOXYMETHYL CELLULOSE SODIUM SALT | 2005 |
|
RU2307127C2 |
| METHOD FOR PREPARING CARBOXYMETHYLCELLULOSE SODIUM SALT | 2002 |
|
RU2223278C1 |
| POLYANIONIC CELLULOSE PRODUCTION PROCESS | 2004 |
|
RU2272811C1 |
| REAGENT-DEPRESSOR FOR FLOATATION OF ORES OF FERROUS METALS AND METHOD OF PRODUCTION OF THIS REAGENT | 2001 |
|
RU2209687C2 |
| METHOD OF PRODUCING CARBOXYMETHYL CELLULOSE | 2012 |
|
RU2489444C1 |
| METHOD FOR PREPARING CARBOXYMETHYL STARCH SODIUM SALT | 2006 |
|
RU2318001C2 |
| METHOD OF PRODUCING CARBOXYMETHYLCELLULOSE | 0 |
|
SU859374A1 |
| METHOD OF SYNTHESIS OF HYDROXYALKYLCARBOXYMETHYL-STARCH | 2000 |
|
RU2190623C2 |
| 0 |
|
SU347334A1 | |
| METHOD FR OBTAINING SODIUM SALT OF CARBOXYMETHYLCELLULOSE | 0 |
|
SU1691363A1 |
