Treatment of liquids containing complexed heavy metals and compl

Details Treatment of liquids containing complexed heavy metals and compl Treatment of liquids containing complexed heavy metals and compl

1976-07-09

1978-02-28

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 38B, 260583N, B01D 1504, B01D 1506

Patent

active

040766187

ABSTRACT:
Methods are provided for separating by-products from alkanolamine complexing agents and heavy metals complexed with alkanolamines, and for the waste-treating of solutions containing such complexed heavy metals and complexing agents. Illustratively, the pH of an electroless metal deposition bath or bath effluent which contains an alkanolamine complexing agent and an alkanolamine-complexed heavy metal is adjusted to render the complexing agent and complexed heavy metal extractable by an ion exchange medium, the pH-adjusted bath liquid is contacted with an ion-exchange medium capable of extracting the complexed heavy metal and complexing agent, the contacted bath liquid, which contains by-products and is substantially free of the complexed heavy metal and the complexing agent is removed from the ion exchange medium and the complexed heavy metal and complexing agent are recovered from the exchange medium for further use in electroless metal deposition baths.

REFERENCES:
patent: 3003866 (1961-10-01), Mattano et al.
patent: 3075855 (1963-01-01), Agens
patent: 3119709 (1964-01-01), Atkinson
patent: 3148947 (1964-09-01), Fleischmann
patent: 3558288 (1971-01-01), Burrows
patent: 3658470 (1972-04-01), Zievers et al.
patent: 3882018 (1975-05-01), Depree
patent: 3998627 (1976-12-01), Weir et al.

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