Process for the production of iron oxide yellow pigments

Details Process for the production of iron oxide yellow pigments Process for the production of iron oxide yellow pigments

1990-02-26

1993-02-09

Bell, Mark L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423633, 106456, C01G 4502

Patent

active

051851415

ABSTRACT:
Low-silking iron oxide yellow pigments having improved color qualities are produced by a novel method which utilizes both precipitation process and the Penniman process. Pigments are nucleated and grown by precipitation to achieve multiplication factor of 2.5 to 7 and additional pigment growth is carried out by the Penniman process.

REFERENCES:
patent: 1327061 (1920-01-01), Penniman et al.
patent: 1368748 (1921-02-01), Penniman et al.
patent: 2111726 (1932-07-01), Plews
patent: 4060596 (1977-11-01), Nakamura
patent: 4112063 (1978-09-01), Buxbaum
patent: 4620879 (1986-11-01), Burow et al.
patent: 4698100 (1987-10-01), Burow et al.
patent: 4806335 (1989-02-01), Saito et al.

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