Process for the preparation of cellulose ethers from ammonia-act

Details Process for the preparation of cellulose ethers from ammonia-act Process for the preparation of cellulose ethers from ammonia-act

1983-10-27

1985-01-01

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 95, 536 96, 536 98, 536100, 536101, C08B 1102, C08B 1108, C08B 1112

Patent

active

044916612

ABSTRACT:
A process is disclosed for the preparation of water-soluble cellulose ethers, comprising the steps of activating cellulose with ammonia, alkalizing the activated cellulose, and etherifying the alkali cellulose. In the process, the activated cellulose is alkalized in the presence of ammonia and, optionally, in the presence of an organic solvent, and the ammonia is removed from the alkali cellulose in the presence of the alkalizing agent and, optionally, the organic solvent. Etherification proceeds in a medium which contains at least portions of said organic solvent. The organic solvent comprises, in particular, an alkanol which has from 1 to 6 carbon atoms. For the etherification step, carboxymethylation or hydroxyethylation is preferred.

REFERENCES:
patent: 1682294 (1928-08-01), Lilienfeld
patent: 2110526 (1938-03-01), Lorand
patent: 2145273 (1938-01-01), Peterson et al.
patent: 2157083 (1938-01-01), Peterson
patent: 2290888 (1942-07-01), Miller et al.
patent: 2294924 (1942-09-01), Miller et al.
patent: 2294925 (1942-03-01), Miller
patent: 2296829 (1942-09-01), Barry
patent: 2308692 (1943-01-01), Freeman et al.
patent: 2671780 (1954-03-01), Gaver et al.
patent: 2729535 (1956-01-01), Balassa et al.
patent: 3069409 (1962-12-01), Henry et al.
Chemical Abstracts vol. 96, (1982), Jun., No. 26, Abstract 96:219564C.
USSR Inventor's Certificate Specification No. 907004-Fld. Jun. 2, 1980.

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