Process for the removal of heavy metals from contaminants

Details Process for the removal of heavy metals from contaminants Process for the removal of heavy metals from contaminants

1992-11-03

1994-09-13

Hruskoci, Peter A.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

210728, 210751, 210912, 210913, 210914, 405128, 588249, C02F 1114

Patent

active

053470710

ABSTRACT:
A process for the treatment of contaminants using metal scavenger is disclosed. The metal scavengers individually comprise a polyamine derivative and a polyethyleneimine derivative. The polyamine derivative is formed of a polyamine having a molecular weight not higher than 500 and contains, per molecule of the polyamine, at least one dithiocarboxyl group or a salt thereof as an N-substituting group substituted for an active hydrogen atom of the polyamine. The polyethyleneimine derivative is formed from a polyethyleneimine having an average molecular weight of at least 5,000 and contains, per molecule of the polyethyleneimine, at least one dithiocarboxyl group or a salt thereof as an N-substituting group substituted for an active hydrogen atom of the polyethyleneimine.

REFERENCES:
patent: 3935098 (1976-01-01), Oda et al.
patent: 4180469 (1979-12-01), Anderson
patent: 4578195 (1986-03-01), Moore et al.
patent: 4731187 (1988-03-01), Moriya et al.
patent: 5130051 (1992-07-01), Falk

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