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2 041 275

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IPC

(21) (22)

Application

5021390/02, 1992-01-09

(22)

Actual filing date

1992-01-09

(45)

Published

1995-08-09

(72)

Inventor

Ben'Jash E.Ja.Tolstunova I.I.Rybakova V.A.Reznichenko V.V.Ivanitskij O.A.

(73)

Holder

Vostochnyj Nauchno-Issledovatel'Skij Gorno-Metallurgicheskij Institut Tsvetnykh Metallov

CUPEL LITHARGE REPROCESSING METHOD Russian patent published in 1995 - IPC

Abstract RU 2041275 C1

FIELD: nonferrous metallurgy. SUBSTANCE: method involves grinding and treating cupel litharge by nitric acid; separating obtained lead nitrate solution from solids; precipitating lead sulfate from solution; depulping lead sulfate in water and continuously pouring with sodium hydroxide solution at pH value of 10.0-10.6; separating obtained tribasic lead sulfate from mother solution, washing and drying. Ready product may be used as polyvinylchloride plasticizer stabilizer in plastic material production. EFFECT: increased efficiency and enhanced reliability in operation. 2 tbl

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RU 2 041 275 C1

Authors

Ben'Jash E.Ja.

Tolstunova I.I.

Rybakova V.A.

Reznichenko V.V.

Ivanitskij O.A.

Dates

1995-08-09—Published

1992-01-09—Filed