Transparent red iron oxide pigments and process for producing sa

Details Transparent red iron oxide pigments and process for producing sa Transparent red iron oxide pigments and process for producing sa

1978-11-06

1980-05-06

Cooper, Jack

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

106304, C01G 4906, C09C 124

Patent

active

042017629

ABSTRACT:
Transparent red iron oxide pigments of outstanding quality and particularly high clarity and strength and good dispersibility characteristics are described. The pigments are produced by heating a dry mixture of alpha-ferric oxide hydrate particles and at least 0.2 part per part of hydrate of a salt which is an alkali metal nitrate, nitrite or mixtures thereof to a temperature above the melting point of the salt and recovering the resulting ferric oxide as a pigment.

REFERENCES:
patent: 3471258 (1969-10-01), Brixner
patent: 3864463 (1975-02-01), Chao
patent: 4063957 (1977-12-01), Von Lauff et al.

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