Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1991-02-08
1992-07-21
Hruskoci, Peter
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
75713, 75733, 210724, 210738, 210199, 210207, 210248, 210912, 210919, 266170, C02F 166
Patent
active
051320223
ABSTRACT:
An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. A baffle and long folded ribbons inside the chamber promote mixing of the developer and fixer. A source of iron ions such as fine steel wool is immersed in the fluids. Ion exchange between the steel wool and the photographic fixer recovers silver from the fixer. The desilvered fluid is diluted with wash water before it is discharged from the chamber.
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