Multiple-stage precipitation process for heavy metals in aqueous

Details Multiple-stage precipitation process for heavy metals in aqueous Multiple-stage precipitation process for heavy metals in aqueous

1992-05-14

1993-11-16

Silverman, Stanley S.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210726, 210911, 423 87, 423602, 423617, 423 43, 423 47, C02F 158

Patent

active

052620638

ABSTRACT:
In the process of removing heavy metals from aqueous solutions by precipitation of a salt thereof at increased pH, multiple stage precipitation by upward stepwise pH adjustment and solid separation at each stage is used to facilitate the manufacture of a product of high purity.

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