Metal scavengers and processes for the production thereof

Details Metal scavengers and processes for the production thereof Metal scavengers and processes for the production thereof

1993-07-28

1995-03-07

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

210728, 210735, 252180, 525343, 525354, C02F 156, C08F 2802, C08F 834

Patent

active

053958969

ABSTRACT:
The present invention is intended to provide a metal scavenger that is free from the defects of metal scavengers formed by introducing dithioic acid groups to polyalkylenepolyamines or the like, is high in settling speed of flock when used in waste water treatment, and can carry out treatment of waste water efficiently and also to provide a process of producing the same efficiently. The present metal scavenger has a structure that is formed by replacing the hydrogen atoms linked to the nitrogen atoms of a polyamine having aminomethyl groups by dithioic acid groups or their salts and that is represented by the following general formula: ##STR1## wherein R represents a dithioic acid group, an alkali metal dithioate group, an alkaline earth metal dithioate group, or an ammonium dithioate group and R' represents a hydrogen atom, a dithioic acid group, an alkali metal dithioate group, an alkaline earth metal dithioate group, or an ammonium dithioate group.
The present metal scavenger can be obtained by causing carbon disulfide to act on a polyamine having aminomethyl groups or by polymerizing a monomer having the following formula: ##STR2## wherein R represents a dithioic acid group, an alkali metal dithioate group, an alkaline earth metal dithioate group, or an ammonium dithioate group and R' represents a hydrogen atom, a dithioic acid group, an alkali metal dithioate group, an alkaline earth metal dithioate group, or an ammonium dithioate group.

REFERENCES:
patent: 4670160 (1987-06-01), Moriya
patent: 4670180 (1987-06-01), Moriya
patent: 4731187 (1988-03-01), Moriya
patent: 4864075 (1989-09-01), Thompson
patent: 4990656 (1991-02-01), Bresson
patent: 5130473 (1992-07-01), Jacobs
patent: 5164095 (1992-11-01), Sparapany

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