Membrane assisted settling process

Details Membrane assisted settling process Membrane assisted settling process

1989-11-13

1990-12-18

Spear, Frank

Liquid purification or separation

Processes

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

210634, 210650, 210651, 210652, 210644, B01D 6158

Patent

active

049784544

ABSTRACT:
A method for separating mixtures into a first fraction and a second fraction employing a combination of settling, ultrafiltration and permeate/retentate recycle to the settling zone is disclosed. A multi component feed stream is fed to a settling zone wherein it is permitted to separate into two major phases. At the interface of these two phases is an intermediate zone which is relatively equal in concentration of the component in the feed. A slip stream is drawn from the settling zone at this intermediate zone and fed to a membrane separation unit wherein the slip stream is separated into a retentate enriched in one component and a permeate enriched in the other component. The retentate is fed back to the settling zone to an area therein which has a high concentration of the component present in the retentate. The permeate is fed to the settling zone to an area therein which has a high concentration of the component present in the permeate. Two streams are recovered from the settling zone, a bottoms stream rich in one component and a top stream rich in a second component.

REFERENCES:
patent: 2232722 (1941-02-01), Parkhurst
patent: 2754249 (1956-07-01), Myers et al.
patent: 3725257 (1973-04-01), Cavenaghi et al.
patent: 3917526 (1975-11-01), Jennings
patent: 3985644 (1976-10-01), Eberly
patent: 4391711 (1983-07-01), Jackson et al.
patent: 4426293 (1984-01-01), Mason et al.
patent: 4432866 (1984-02-01), West et al.
"Oily Bilge Water Treatment with a Tubular Ultrafiltration System" Harris, et al., Journal of Engineering for Industry, Nov. 1976, pp. 1215.1220.

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