Recycling and recovery of aqueous cleaner solutions

Details Recycling and recovery of aqueous cleaner solutions Recycling and recovery of aqueous cleaner solutions

1991-10-08

1993-05-04

Dawson, Robert A.

Liquid purification or separation

Processes

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

210650, 210671, 210800, 210803, 210805, B01D 6100

Patent

active

052079171

ABSTRACT:
A process and apparatus are disclosed for separating an aqueous cleaner solution from contaminants that accumulate as the cleaner is used in washing manufactured objects, such as machine parts or printed circuit boards. In the separation process, filtration of contaminated aqueous cleaner solutions using a membrane of an appropriately chosen pore size removes oils, greases, fluxes, rosins and other emulsified or dispersed contaminants from the cleaners while permitting the molecules of the cleaner itself to stay in solution. The filtered cleaner solution is then recycled to the wash tank. Also disclosed are a process and apparatus for treating the rinse water used to rinse objects that are cleaned with the recycled cleaner.

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