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2 034 880

(13)

(51)

IPC

(21) (22)

Application

4911079/26, 1991-01-08

(22)

Actual filing date

1991-01-08

(45)

Published

1995-05-10

(72)

Inventor

Gruzdev Ju.A.Gerasimov D.A.

(73)

Holder

Cheljabinskij Filial Nauchno-Issledovatel'Skogo I Proektnogo Instituta Neorganicheskikh Pigmentov I Sudovykh Pokrytij Nauchno-Proizvodstvennogo Ob"Edinenija

METHOD OF PREPARING OF DARK-VIOLET COBALT PIGMENT Russian patent published in 1995 - IPC

Abstract RU 2034880 C1

FIELD: chemical technology. SUBSTANCE: cobalt sulfate solution is mixed with phosphoric acid solution at pH 4.8-5.0 and added to the ammonia solution up to pH 5.0-5.5. Suspension is filtered, dried and precipitate is milled, calcined. Product is washed, dried repeatedly and ground. Properties: pigment has dark-violet color, staining capability is 110%, covering power is 70-78 g/m², dispersity is 30 mcm. EFFECT: improved method of pigment preparing. 1 tbl

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RU 2 034 880 C1

Authors

Gruzdev Ju.A.

Gerasimov D.A.

Dates

1995-05-10—Published

1991-01-08—Filed