Recycling of dyed cellulosic waste

Details Recycling of dyed cellulosic waste Recycling of dyed cellulosic waste

1995-12-08

1997-03-11

Brunsman, David

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

1061662, 1061663, 1061664, 10616641, 10616642, 1061665, C09D10124, C08L 124

Patent

active

056096763

ABSTRACT:
A process which comprises suspending a reactive-dyed cellulose material, optionally in mixture with pulp, in an alkali metal hydroxide solution (alkali cellulose), optionally subjecting the alkali cellulose to the action of a reducing sulfur compound at a temperature from 20.degree. to 80.degree. C., then allowing the alkali cellulose to ripen at temperatures from 30.degree. to 80.degree. C. for at least 30 minutes, dissolving the alkali cellulose at a temperature from 10.degree. to 30.degree. C. by conversion with carbon disulfide into the xanthate, and spinning the xanthated alkali cellulose into fibers, makes it possible to recycle cellulosic waste textiles into similarly colored or colorless cellulose fiber materials.

REFERENCES:
patent: 2184586 (1939-12-01), Donagemma et al.
patent: 2337928 (1943-12-01), Reichel
patent: 2979500 (1961-04-01), Opderbeck et al.
patent: 3817983 (1974-06-01), TenBroeck, Jr. et al.

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