Process for purifying acrylonitrile effluent

Details Process for purifying acrylonitrile effluent Process for purifying acrylonitrile effluent

1991-07-03

1992-02-25

Spear, Frank

Liquid purification or separation

Processes

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

210652, B01D 6104

Patent

active

050910930

ABSTRACT:
The effluent arising in the production of acrylonitrile can be purified by adjusting it to a pH value from 4 to 9 and then subjecting it to reverse osmosis at a membrane at a temperature from 10.degree. to 50.degree. C. and a differential pressure of 10 to 80 bar. The flow velocity at the membrane is adjusted to a value from 0.5 to 4 m/second. The concentrate is recycled into the acrylonitrile production process.

REFERENCES:
patent: 4083780 (1978-04-01), Call
patent: 4235983 (1980-11-01), Steigelman et al.

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