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Process for the preparation of cellulose ethers from ammonia-activated cellulose

  • US 4,491,661 A
  • Filed: 10/27/1983
  • Issued: 01/01/1985
  • Est. Priority Date: 11/11/1982
  • Status: Expired due to Fees
First Claim
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1. A process for the preparation of water-soluble cellulose ethers, comprising the steps of:

  • (a) activating cellulose with ammonia;

    (b) alkalizing the activated cellulose with an alkalizing agent in the presence of ammonia, said alkalizing agent comprising an aqueous solution of an alkali metal hydroxide;

    (c) removing the ammonia from the alkali cellulose in the presence of the alkalizing agent; and

    (d) etherifying the alkali cellulose with an etherifying agent in the presence of an organic solvent.

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