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2 081 837

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C1

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IPC

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Application

95110233/25, 1995-06-16

(22)

Actual filing date

1995-06-16

(45)

Published

1997-06-20

(72)

Inventor

Glazyrina L.N.Fedorova N.V.Desjatnik V.N.Popov B.A.Gorjajnov V.Eh.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa

METHOD FOR PRODUCTION OF COMPLEX OXIDE MATERIALS ON THE BASE OF CHROMIUM Russian patent published in 1997 - IPC

Abstract RU 2081837 C1

FIELD: production of complex oxide materials on the base of chromium having abrasive and pigment properties. SUBSTANCE: method involves reduction precipitation of dichromate-thiosulfate-carbonate solutions, their neutralization with the help of aqueous solution of ammonium (25-40 % mother solutions being recycled) and heat treatment within 800-1000 C. Said reduction precipitation is carried out at stoichiometric amount of sodium thiosulfate and ammonium dicarbonate. EFFECT: improved efficiency of the method. 2 cl, 1 dwg, 1 tbl

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RU 2 081 837 C1

Authors

Glazyrina L.N.

Fedorova N.V.

Desjatnik V.N.

Popov B.A.

Gorjajnov V.Eh.

Dates

1997-06-20—Published

1995-06-16—Filed

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