Precious metal recovery apparatus

Classifying – separating – and assorting solids – Sifting – With liquid treatment

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Details

75118P, 209355, 209405, 209399, 209420, 210456, B07B 104

Patent

active

043714366

ABSTRACT:
Apparatus for recovering silver from spent photographic solutions comprises a tray with a number of non-reactive filter elements having successively smaller porosity through which the spent solutions can be passed. Each successive filter element prevents silver particles of progressively smaller sizes suspended in the liquid from passig therethrough. The filters are stacked in a horizontal position within the tray and a tray cover sits on top of the tray, the cover having an opening into which the developing solutions can be poured. The tray includes a drainage port which allows liquid passing through the filters to drain out of the tray.

REFERENCES:
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patent: 3370705 (1968-02-01), Grulke
patent: 3386580 (1968-06-01), Grabarczyk
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patent: 3943754 (1976-03-01), Orr
patent: 4078916 (1978-03-01), Gerber
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patent: 4213600 (1980-07-01), Thompson
patent: 4233151 (1980-11-01), Gundlach
patent: 4289241 (1981-09-01), Litrap

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