Process and equipment for preparing swellable cross-linked carbo

Details Process and equipment for preparing swellable cross-linked carbo Process and equipment for preparing swellable cross-linked carbo

1979-05-29

1981-02-10

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

68DIG5, 536 85, 536 87, 536 98, C08B 1510, D04H 142

Patent

active

042503060

ABSTRACT:
This invention relates to a process for preparing swellable cross-linked carboxyalkylcelluloses by reacting cellulose, a carboxyalkylating etherifying agent, and a cross-linking agent in an aqueous alkaline medium, comprising effecting alkalizing, etherifying, and cross-linking simultaneously in one reaction step using fibers, textile sheet materials containing these fibers, or sheet materials of other kinds, having a base of cellulose hydrate or of natural cellulose, by contacting said fibers or sheet materials with an ample quantity of an aqueous alkaline reaction mixture, removing part of the reaction mixture from the fibers or sheet materials contacted therewith, so that at least the quantity required for reaction is still present, and treating the fibers or sheet materials containing the remainder of the aqueous alkaline reaction mixture with heat energy. The invention also relates to equipment for performing the process.

REFERENCES:
patent: 2145862 (1939-02-01), Collings et al.
patent: 2553725 (1951-05-01), Rogers et al.
patent: 2879607 (1959-03-01), Fleissner et al.
patent: 3589364 (1971-06-01), Dean
patent: 3928920 (1975-12-01), Fleissner
patent: 3997647 (1976-12-01), Lassen
patent: 4066828 (1978-01-01), Holst et al.
patent: 4068067 (1978-01-01), Holst et al.
patent: 4068068 (1978-01-01), Holst et al.
patent: 4075279 (1978-02-01), Holst et al.
patent: 4097667 (1978-06-01), Holst et al.
Chemical Abstracts, vol. 85, No. 2, Jul. 12, 1976, p. 7217q.
Chemical Abstracts, vol. 86, No. 26, Jun. 27, 1977, p. 191581y.

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