Low color, low turbidity sulfolane

Details Low color, low turbidity sulfolane Low color, low turbidity sulfolane

1991-02-22

1993-06-29

Manoharan, Virginia

Distillation: processes, separatory

Including purging of the system

203 75, 203 77, 203 78, 203 80, 549 87, B01D 310

Patent

active

052231011

ABSTRACT:
Purification of crude sulfolane to remove color imparting and turbidity imparting impurities therefrom is achieved by a two-pass distillation process wherein purified sulfolane is withdrawn from the bottom of a column in the second distillation pass.

REFERENCES:
patent: 3252997 (1966-05-01), Ridderikhoff et al.
patent: 3352765 (1967-11-01), Warner et al.
patent: 3514469 (1970-05-01), Phillips et al.
patent: 4383895 (1983-05-01), Ernst et al.
patent: 4861447 (1989-08-01), Blytas et al.
Kirk-Othmer Encyclopedia of Chemical Technology, vol. 21, pp. 961-968.

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