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2 094 367

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C1

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IPC

(21) (22)

Application

93050853/25, 1993-11-09

(22)

Actual filing date

1993-11-09

(45)

Published

1997-10-27

(72)

Inventor

Gunina T.V.Chumaevskij V.A.Kapralov A.V.

(73)

Holder

Nauchno-Proizvodstvennoe Tovarishchestvo

METHOD OF ZINC-NITRATE-PHOSPHATE CONCENTRATE PRODUCING Russian patent published in 1997 - IPC

Abstract RU 2094367 C1

FIELD: chemical technology. SUBSTANCE: method involves mixing the technical zinc oxide with water and zinc monophosphate solution at weight ratio ZnO : water : zinc monophosphate solution = 1:(1-4):(3-11) followed by addition of nitric acid. Before nitric acid addition sodium chlorate solution is added at amount 0.25-0.45 weight % (as measured for NaClO3). Nitric acid is added at the rate 30-70 kg/min. Invention can be used for making phosphatic concentrates. EFFECT: increased stability of concentrates, decreased time for composition correction and preparing, decreased cost. 1 tbl

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RU 2 094 367 C1

Authors

Gunina T.V.

Chumaevskij V.A.

Kapralov A.V.

Dates

1997-10-27—Published

1993-11-09—Filed

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