Process for manufacturing viscose

Details Process for manufacturing viscose Process for manufacturing viscose

1979-12-10

1981-09-01

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

106165, C08B 904

Patent

active

042873347

ABSTRACT:
Process for manufacturing viscose solutions having good filterability and producing low amounts of sulfide gases during subsequent spinning; said process comprising treating cellulose with a first alkali metal hydroxide solution in a first alkalization step, freeing the alkalized cellulose from at least part of the excess hydroxide solution without pressing-off, and treating the cellulose with a second alkali metal hydroxide solution in a second alkalization step while maintaining the temperature of the reaction mixture at not more than 18.degree. C.

REFERENCES:
patent: 1955092 (1934-04-01), Richter
patent: 2143863 (1939-01-01), Collings et al.
patent: 2735846 (1956-02-01), Richter
patent: 2985647 (1961-05-01), Von Kohorn
patent: 3600379 (1971-08-01), Sihtola et al.
patent: 3728330 (1973-04-01), Sihtola et al.
patent: 4136255 (1979-01-01), Franks

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