Removal of nobler metal ions than iron from process and waste wa

Details Removal of nobler metal ions than iron from process and waste wa Removal of nobler metal ions than iron from process and waste wa

1992-01-13

1992-12-08

Wyse, Thomas

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210719, 210724, 210912, C02F 162

Patent

active

051695383

ABSTRACT:
The application relates to a process for removing nobler metal ions than iron, especially copper ions, from acidic process and waste waters by reduction under an inert gas atmosphere with carbonyl iron powders which have previously been subjected to a thermal treatment with hydrogen to remove nitrides and carbides. This process results in residual metal ion content <0.5 ppm and thus complete removal of the metal ions to be reduced.

REFERENCES:
patent: 3755161 (1973-08-01), Yokata et al.
patent: 4740244 (1988-04-01), Williams
patent: 4806264 (1989-02-01), Murphy
patent: 4874530 (1989-10-01), Kobayashi et al.
patent: 4956097 (1990-09-01), Courduvelis
patent: 5085836 (1992-02-01), Booker

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