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Optimization of a process for carboxymethyl cellulose (CMC) preparation in mixed solvents

A benzene-ethanol-water mixture was investigated as the solvent medium in synthesizing carboxymethyl cellulose (CMC). The process of carboxymethylation was optimized to produce CMC with DS > I.0, solution viscosity about 1500 mpa·s, and with uniform distribution of substituents. It is possible to scale up this process by using a kneading machine.