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(19)

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2 510 410

(13)

(51)

IPC

C09C1/34(2006-01-01)

C01B25/26(2006-01-01)

C09D5/08(2006-01-01)

(21) (22)

Application

2012122922/05, 2012-06-04

(24)

Start date

2012-06-04

(22)

Actual filing date

2012-06-04

(45)

Published

2014-03-27

(72)

Inventor

Lenev Lev MikhajlovichKonotopchik Konstantin Ul'JanovichStanovnova Nailja ValievnaLenev Nikita Sergeevich

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Institut Pigmentnykh Materialov S Opytnym Proizvodstvom" Pm")

METHOD OF PRODUCING ANTICORROSIVE PIGMENT - CHROMIUM PHOSPHATE Russian patent published in 2014 - IPC C09C1/34 C01B25/26 C09D5/08

Abstract RU 2510410 C2

FIELD: chemistry.

SUBSTANCE: chromium phosphate is obtained in a reactor by dissolving chromium trioxide in water. Orthophosphoric acid and a stabilising additive - ethanol - are then added. A strong reducing agent - aqueous hydrazine-hydrate solution - is slowly added to the obtained mixture of chromic acid, orthophosphoric acid and ethanol in an amount which enables formation and maturation of chromium phosphate particles, suspension pH of 4-7 and concentration of chromium phosphate of 50-100 g/cm. The end product is then filtered and dried. The filtrate is returned to preparation of the mixture of chromium trioxide, orthophosphoric acid and ethanol.

EFFECT: invention simplifies the technique and completely prevents formation of waste water.

1 tbl, 6 ex

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RU 2 510 410 C2

Authors

Lenev Lev Mikhajlovich

Konotopchik Konstantin Ul'Janovich

Stanovnova Nailja Valievna

Lenev Nikita Sergeevich

Dates

2014-03-27—Published

2012-06-04—Filed