Cellulose ether is made from natural cellulose (pulp) as raw material, through alkalization and etherification reaction. It's a large class of cellulose derivatives.
The development of cellulose ether has a long history. Since the production of nitrocellulose and cellulose acetate in the late nineteenth Century, the product of cellulose ether has been developed. First of all, Suida as early as 1905 in the laboratory with two sulfuric acid methyl ester as etherifying agent and alkali cellulose surface treatment effect, creating a new world, cellulose ether and carboxymethyl cellulose as theoriginator of cellulose ether. In 1912, Lilienfeld used ethyl sulfate two as etherification agent in the laboratory to prepare ethyl cellulose with low etherification degree, and then prepared ethyl cellulose with higher degree of etherification. In 1920, Hubert was used to produce hydroxyethyl cellulose. In 1921, Jansen prepared carboxymethyl cellulose, the same year, Gomberg and Bucher are prepared by benzyl cellulose.
The industrial production of CMC began in 40s, first in Germany, and ethyl cellulose and methyl cellulose respectively to achieve industrial production in the United States in 1936 and 1938, respectively by etherifying agent ethyl chloride and methyl chloride, sulfate and sulfuric acid instead of two ethyl methyl two. Since the production of ether products such as CMC, HPMC, MC, EC, less than half a century, the cellulose ether industry has developed rapidly. Not only a lot of single ether varieties have emerged, but also a lot of mixed ether varieties have emerged. So far, the cellulose ether has become a kind of important polymer industry.