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2 071 511

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C1

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IPC

(21) (22)

Application

93053316/26, 1993-11-26

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Actual filing date

1993-11-26

(45)

Published

1997-01-10

(72)

Inventor

Bulavin P.F.Khadzhi V.E.Sopeleva E.G.Romanov L.N.

(73)

Holder

Khadzhi Valentin Evstaf'Evich

METHOD FOR PRODUCTION OF CITRIN Russian patent published in 1997 - IPC

Abstract RU 2071511 C1

FIELD: jewelry industry. SUBSTANCE: crystals of citrin are prepared at hydrothermal conditions from aqueous solution of potassium carbonate. The process is carried out in the presence of ions of ferrum, lithium nitrate and soluble compound of $$$, their quantity being 0.2-0.5 g/l. Synthesis is carried out at 300-350 C and at pressure 400-1500 atm. Thus prepared crystals have reddish tone. EFFECT: improves quality of desired product. 2 cl, 1 tbl

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RU 2 071 511 C1

Authors

Bulavin P.F.

Khadzhi V.E.

Sopeleva E.G.

Romanov L.N.

Dates

1997-01-10—Published

1993-11-26—Filed

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