Method for cold-milling cellulose derivatives

Details Method for cold-milling cellulose derivatives Method for cold-milling cellulose derivatives

1975-03-06

1977-08-23

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536 56, C08B 1100

Patent

active

040441989

ABSTRACT:
This invention relates to an improvement in the method for the cold-milling of a cellulose derivative, in which the cellulose derivative is cooled by means of liquid nitrogen until it becomes brittle and the thus cooled cellulose derivative is milled in a mill, the improvement comprising cold-milling a cellulose derivative which is soluble or swellable in water and has a water content of between 40 and 150 percent by weight, based on its dry weight, and which is, at 20.degree. C, able to absorb, during swelling, more than 150 percent by weight of water, based on its dry weight.

REFERENCES:
patent: 2057163 (1936-10-01), Richter
patent: 2160106 (1939-05-01), Maxwell
patent: 2288200 (1942-06-01), Meyer
patent: 2331864 (1943-10-01), Swinehart et al.
patent: 2331865 (1943-10-01), Swinehart et al.
patent: 2833758 (1958-05-01), Kohler et al.
patent: 3251824 (1966-05-01), Battista
patent: 3428584 (1969-02-01), Riley
Scott, Cryogenic Engineering, D. Van Nostrand Company, New York, N.Y., 1959, pp. 268, 269 & 276-283.
Refrigeration and Air Conditioning Directory, 1965, p. 369.

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