Metal scavenger and metal scavenging process

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

1986-04-18

1987-06-02

Nielsen, Earl

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

525540, 528387, C02F 510

Patent

active

046701800

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: 3706706 (1972-12-01), Vandenberg
patent: 4191820 (1980-03-01), Langdon
patent: 4277566 (1981-07-01), Kataoka et al.

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