Production of anticorrosive pigments containing phosphorus

Details Production of anticorrosive pigments containing phosphorus Production of anticorrosive pigments containing phosphorus

1979-09-17

1981-10-13

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

106 1412, 106288B, 106292, 106304, 423307, 423308, 423309, 423311, C01B 2526, C01B 2532, C01B 2536, C01B 2537

Patent

active

042948088

ABSTRACT:
The invention relates to a process for making phosphorus-containing anticorrosive pigments having a size of at most 20 microns by reacting one or more compounds of magnesium, calcium, strontium, barium, zinc, aluminum, iron, chromium or manganese with an oxygen acid of phosphorus or its alkali metal or ammonium salts at temperatures within the range 10.degree. to 100.degree. C. More particularly pigments consisting to an extent of at least 90% of particles with a size between 0.05 and 8 microns are produced by introducing an aqueous suspension or solution of the reactants into a dispersing means rotating at a speed of 3000 to 10,000 rpm, reacting the reactants by intimately mixing them, and separating and drying precipitated pigment.

REFERENCES:
patent: 1629200 (1927-05-01), Buhtz
patent: 1768957 (1930-07-01), Johnson
patent: 1806381 (1931-05-01), Baensch
patent: 1926266 (1933-09-01), Darsey
patent: 2703275 (1955-03-01), Elliott et al.
patent: 3467495 (1969-09-01), Nielsson
patent: 3510264 (1970-05-01), Sprigg
patent: 3845198 (1974-10-01), Marcot
Kirk-Othmer, Encyclopedia of Chemical Technology, Second Edition, vol. 22 (1970), p. 611.
Brauer, Handbook of Preparative Inorganic Chemistry, vol. 2, Second Edition (1965), pp. 1081, 1082.

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