Metal scavenger and metal scavenging process

Details Metal scavenger and metal scavenging process Metal scavenger and metal scavenging process

1986-09-11

1987-06-02

Poll, John

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210736, 210912, 423DIG14, 423 24, 423 54, 423100, 423139, 423 89, 528387, 528405, 521 32, 75101BE, C02F 162

Patent

active

046701605

ABSTRACT:
A metal scavenger is composed of an addition product of a polyamine and an epihalohydrin. The addition product contains as substituent or substituents at least one carbodithio group and/or at least one carbodithioate salt group introduced therein by substituting the corresponding number of active hydrogen atom or atoms in the addition product. Metals can be scavenged from waste water by adding the metal scavenger together with at least one of sodium monosulfide, sodium polysulfides and sodium hydrogensulfide.

REFERENCES:
patent: 2356764 (1944-08-01), Kern
patent: 3391090 (1968-07-01), Schiegg
patent: 3655506 (1972-04-01), Baggett
patent: 3706706 (1972-12-01), Vandenberg
patent: 4098867 (1978-07-01), Grinstead et al.
patent: 4191820 (1980-03-01), Langdon
patent: 4277566 (1981-07-01), Kataoka et al.

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