Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Patent
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.
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patent: 2735846 (1956-02-01), Richter
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patent: 3600379 (1971-08-01), Sihtola et al.
patent: 3728330 (1973-04-01), Sihtola et al.
patent: 4136255 (1979-01-01), Franks
Fauth Heinrich
Koch Werner
Griffin Ronald W.
Hoechst Aktiengesellschaft
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