Washing apparatus and washing method

Details Washing apparatus and washing method Washing apparatus and washing method

1996-08-28

1998-12-22

Ludlow, Jan

Cleaning and liquid contact with solids

Processes

Including regeneration, purification, recovery or separation...

134 2, 134 19, 134254, 134 26, 134 40, C23G 124, C23G 126, C23G 136

Patent

active

058513051

ABSTRACT:
A washing apparatus includes a washing bath in which articles to be cleaned are washed. The washing bath contains a detergent of a kind containing a nonion surface active agent and a terpene-based solvent as principal components thereof. The articles to be cleaned are, after having been washed in the washing bath, immersed in a rinsing bath containing a rinsing water. The rinsing bath is provided with a recirculating passage extending from a portion of the rinsing bath back to another portion of the rinsing bath, a precision filter disposed on the recirculating passage and having a micro-porous membrane having an average pore size not smaller than 0.01 .mu.m, but not greater than 0.2 .mu.m, and an adsorbent filter containing a mass of activated carbon for substantially purifying the rinsing water which has been passed through the precision filter. The articles to be cleaned are first washed with the detergent of the specified kind and then rinsed within the rinsing bath. The rinsing water used for the articles is, after having been filtered through the micro-porous membrane, substantially purified by the adsorbent filter containing a mass of activated carbon.

REFERENCES:
patent: 5146938 (1992-09-01), Lutener et al.
patent: 5213624 (1993-05-01), Williams
patent: 5300154 (1994-04-01), Ferber et al.
patent: 5389156 (1995-02-01), Mehta et al.
patent: 5393451 (1995-02-01), Koetzle
patent: 5425814 (1995-06-01), Krajicek et al.
patent: 5464477 (1995-11-01), Awad
patent: 5503681 (1996-04-01), Inada et al.

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