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Application

95116496/12, 1995-09-22

(24)

Start date

1995-09-22

(22)

Actual filing date

1995-09-22

(45)

Published

2000-01-20

(72)

Inventor

Danilov V.I.Kuznetsov A.A.Tereshenkov V.N.Lipin V.A.Novozhilova V.K.

(73)

Holder

Aktsionernoe Obshchestvo Zakrytogo Tipa

METHOD OF PREPARING POTASSIUM SULFATE Russian patent published in 2000 - IPC

Abstract RU 2144500 C1

FIELD: chemical technology. SUBSTANCE: method comprises conversion of potash with sodium sulfate or mixture thereof with sodium carbonate for 3 or 4 h to obtain sodium oxide concentration of 60-105 g/l in solution after recovery of potassium sulfate and evaporation followed by separation of soda from mother liquor. Desired sodium oxide concentration is maintained preferably due to recycle of mother liquor for dissolution of sodium sulfate or mixture thereof with sodium carbonate. Feed rate of potash solution to be mixed with sodium sulfate pulp or mixture thereof with sodium carbonate is 0,5÷5•103 moles of alkali salts per minute. Industrial water resulting from washing potassium sulfate is preferably used for discolution of potash, and temperature of water for washing potassium sulfate is 20-50 C. EFFECT: improved quality of potassium sulfate, reduced moisture content thereof and simplified preparation process. 4 cl, 3 ex, 3 tbl

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RU 2 144 500 C1

Authors

Danilov V.I.

Kuznetsov A.A.

Tereshenkov V.N.

Lipin V.A.

Novozhilova V.K.

Dates

2000-01-20—Published

1995-09-22—Filed

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