Solvent cleansing apparatus

Details Solvent cleansing apparatus Solvent cleansing apparatus

1986-07-07

1987-09-08

Spear, Frank

Liquid purification or separation

Processes

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

2101952, 210103, B01C 1300

Patent

active

046922512

ABSTRACT:
An apparatus is disclosed for cleansing an aliphatic hydrocarbon solvent of an oil based contaminant. The apparatus includes a source of a contaminated solvent and an ultrafiltration filter having a semi-permeable membrane with a pore size selected to pass molecules of the solvent through the membrane and restrict passage through the membrane of molecules of the contaminant. A water cooled jacket is provided for maintaining the temperature of the solvent in the apparatus below a flash point. Pressure switches are provided for maintaining the pressure at the inlet of the ultrafiltration filter below a predetermined maximum to protect the filter. Concentrate of the ultrafiltration filter is recirculated to the source of the contaminated solvent.

REFERENCES:
patent: 3228876 (1966-01-01), Mahon
patent: 3977967 (1976-08-01), Trulson et al.
patent: 4000065 (1976-12-01), Lapha et al.
patent: 4411790 (1983-10-01), Arod et al.
patent: 4606903 (1986-08-01), Hafez et al.

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