Process for removing soluble metal cations in iron oxide pigment

Details Process for removing soluble metal cations in iron oxide pigment Process for removing soluble metal cations in iron oxide pigment

1985-05-10

1988-07-19

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423632, 423633, 106456, 106460, 426431, 426479, 252 82, C01G 4906

Patent

active

047584157

ABSTRACT:
The subject matter of this invention relates to a process for removing the soluble metal cations contained in iron oxide pigments comprising washing said iron oxide pigments with a ligand compound having a pH greater than 6.0. The pigments can be used as colorants for substances ingested by man and animals, and they can also be used to stabilize plastics against ultraviolet degradation, and as pigments in base-coat clear-coat automotive finishing operations.

REFERENCES:
patent: 2904402 (1959-09-01), Cauterman
patent: 3308065 (1967-03-01), Lesinski
patent: 3447965 (1969-06-01), Teumac
patent: 3684720 (1972-08-01), Richardson
patent: 4129454 (1978-12-01), Pavonet
patent: 4261966 (1981-04-01), Portes

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