Method for Deriving Carboxymethyl Cellulose
L.K. Altunina, L.D. Tikhonova, E.G. Yarmukhametova
Institute of Petroleum Chemistry Russian Academy of Sciences
3, Akademichesky Avenue, 634021, Tomsk, Russia
Chemical conversions proceeding in solid substances under mechanical effects are of great practical importance. At solid-phase mechanochemical interaction of powder cellulose and rice husks with a carboxymethylation agent, i.e. sodium monochloracetate, one obtained a product, the composition and properties of which are similar to commercial carboxymethyl cellulose. The given products were synthesized using laboratory microgrinder of a planetary type MA-1. Carboxymethyl cellulose obtained from powder cellulose is water-soluble product. Solubility of carboxymethyl cellulose synthesized from rice husks is about 80-95 %. Viscosity of 5 % aqueous solutions of the products from powder cellulose is about 2-5 mPa×s and viscosity of 10 % aqueous solutions of the products from rice husks is about 4-6 mPa×s. It corresponds to viscosity of 1 % solution of the commercial carboxymethyl cellulose. Carboxymethyl cellulose, obtained from powder cellulose and rice husks, represents a cheap product for petroleum, gas and building branches. Application of efficient and ecologically convenient solid-phase mechanochemical technology of carboxymethylation cellulose-containing products allows using accessible cellulose-containing scraps as raw material without their preliminary preparation and clearing. One can use carboxymethyl cellulose obtained by the solid-phase technology developed to control viscosity of water-based drilling fluids. Solubility and viscosity of these products depend on parameters of the processing and are compared to similar properties of commercial carboxymethyl cellulose.