Process for the continuous manufacture of cellulose glycolate

Details Process for the continuous manufacture of cellulose glycolate Process for the continuous manufacture of cellulose glycolate

1975-01-06

1977-04-12

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

C08B 1100

Patent

active

040176711

ABSTRACT:
In the manufacture of cellulose glycolate, a reaction mixture comprising per 1 part by weight of cellulose 0.2 to 0.6 part by weight of sodium hydroxide, 0.5 to 1.75 parts by weight of sodium monochloroacetate, 7 to 22 parts by weight of isopropanol, and from 20% to 50% by weight, based on the weight of isopropanol, of water is subjected to shearing forces at a temperature less than 30.degree. C to effect intimate mixing and then reacted to cause etherification of the cellulose in a reaction area held at a temperature in the range of 60.degree. C to 90.degree. C and held constant within each section of the reaction area. The residence time of the mixture in the mixing zone is at most one-tenth of its residence time in the reaction area. The solid and liquid components of the reaction mixture after etherification are separated mechanically.

REFERENCES:
patent: 2512338 (1950-06-01), Klug et al.
patent: 2517577 (1950-08-01), Klug et al.
patent: 3088943 (1963-05-01), Cordrey et al.
patent: 3498971 (1970-03-01), Blaga et al.
patent: 3678031 (1972-07-01), Schoggen
patent: 3857833 (1974-12-01), Warzecha et al.
patent: 3900463 (1975-08-01), Yada et al.

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