Preparation of cellulose derivatives using highly reactive alkal

Details Preparation of cellulose derivatives using highly reactive alkal Preparation of cellulose derivatives using highly reactive alkal

1980-07-07

1982-07-13

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536 91, 536 98, 536 99, 536101, C08B 106, C08B 108, C08B 1102, C08B 11193

Patent

active

043395732

ABSTRACT:
This invention relates to an improved process for preparing cellulose derivatives by alkalizing cellulose to form alkali cellulose, alkylating the alkali cellulose to form alkylated alkali cellulose, and recovering the alkylated alkali cellulose. According to the process of the invention, finely-divided, preferably powdered, cellulose is reacted with an aqueous-alcoholic alkali metal hydroxide solution at a temperature of from about 20.degree. to 120.degree. C., to form alkali cellulose, oxygen is removed, and the water content is reduced to from about 2.5 to 6.0 moles per anhydroglucose unit, prior to alkylization.

REFERENCES:
patent: 2296829 (1942-09-01), Barry
patent: 2619483 (1952-11-01), Wilcox et al.
patent: 2977355 (1961-03-01), Bradshaw et al.
patent: 3255071 (1966-06-01), Kleinert
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, Band 238, 1954, Paris, France--pp. 1318-1320.

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