Treatment of impurity-containing liquid streams in ethylene oxid

Details Treatment of impurity-containing liquid streams in ethylene oxid Treatment of impurity-containing liquid streams in ethylene oxid

1989-12-27

1991-07-23

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210654, B01D 6100

Patent

active

050341340

ABSTRACT:
A method is disclosed for separating impurity components, UV absorbers and/or UV absorber precursors contained in an ethylene glycol-water stream thereby desirably allowing the recovery of the glycols contained in such stream in an economical and efficient manner. Specifically, these undesirable components are separated by contacting the ethylene glycol-water stream with a suitable semi-permeable membrane to effect such separation.

REFERENCES:
patent: 3904656 (1975-09-01), Broz
patent: 4277344 (1981-07-01), Cadotte
patent: 4427507 (1984-01-01), van Aken et al.
patent: 4737325 (1988-04-01), Kamiyama et al.
patent: 4830712 (1989-05-01), Crandall et al.
patent: 4830885 (1989-03-01), Tran et al.

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