Preparing cellulose ethers in a dimethoxyethane/(dispersing auxi

Details Preparing cellulose ethers in a dimethoxyethane/(dispersing auxi Preparing cellulose ethers in a dimethoxyethane/(dispersing auxi

1984-02-17

1985-02-26

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

106170, 106311, 252182, 536 95, 536 98, 536 99, C08B 1104, C08B 1108, C08B 1112, C08B 11193

Patent

active

045018871

ABSTRACT:
In modern processes for the preparation of cellulose ethers containing one or more types of substituents (such as MC, CMC, HEC, HPC, MHEC or EHEC), cellulose is reacted with etherifying agents in the presence of water, base and a mixture of preferably inert organic solvents (as a dispersing auxiliary). Dimethoxyethane (ethylene glycol dimethyl ether) and at least one organic solvent selected from the group including alkanols, alkane diols and alkoxy alkanols (for example, methanol and/or isopropanol) are employed in the mixture of organic solvents used for these syntheses, particularly in quantities of 1 to 30 parts by weight per 1 part by weight of cellulose.

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patent: 4366310 (1982-12-01), Leslie
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Bulletin de la Societe Chimique de France, 1968, No. 3, pp. 1205-1210.
Ullmanns Encyklopaedie der technischen Chemie, vol. 9, Verlag Chemie-Weinheim, 4th Edition 1975.

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