Engine collant recycling apparatus and process

Details Engine collant recycling apparatus and process Engine collant recycling apparatus and process

1991-07-03

1992-12-01

Sever, Frank

Liquid purification or separation

Processes

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

210652, 2101952, 2102572, B01D 6102, B01D 6106

Patent

active

051678268

ABSTRACT:
An apparatus and a process for recycling used engine coolant employs a reverse osmosis process for separating ethylene glycol from a concentrate coolant solution. The engine coolant concentrate is pre-filtered through a series of filters and pressurized prior to being passed through a semi-permeable membrane. The membrane separates the feed stream into a permeate solution of ethylene glycol and water and concentrate solution. The concentrate solution is returned to a concentrate tank for continuous circulation through the apparatus. A heat exchanger maintains the temperature of the concentrate solution below a pre-established threshold.

REFERENCES:
patent: 4357236 (1982-11-01), Krueger
patent: 4946595 (1990-08-01), Miller

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