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2 144 501

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IPC

(21) (22)

Application

98117919/12, 1998-10-01

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Start date

1998-10-01

(22)

Actual filing date

1998-10-01

(45)

Published

2000-01-20

(72)

Inventor

Safrygin Ju.S.Osipova G.V.Buksha Ju.V.Timofeev V.I.Terent'Eva G.I.Vybornova G.Ju.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo

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

Abstract RU 2144501 C1

FIELD: chemical industry. SUBSTANCE: method comprises reacting ammonium sulfate solution with potassium chloride suspension to isolate double salt of potassium and ammonium sulfates. Salt is treated with 5-15% potassium sulfate solution at L:S ratio of grater than 1-5. Mother liquor is directed to double salt preparation stage. Potassium sulfate and double salt are washed with solution of potassium sulfate of the same composition used for treatment of double salt. Solution of potassium sulfate is used in volume which in not less than volume of mother liquor which impregnates salt. Double salt is treated preferably at L:S ratio of 2. EFFECT: smaller amount of chloride ion in the product and simplified process.

Similar patents RU2144501C1

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RU 2 144 501 C1

Authors

Safrygin Ju.S.

Osipova G.V.

Buksha Ju.V.

Timofeev V.I.

Terent'Eva G.I.

Vybornova G.Ju.

Dates

2000-01-20—Published

1998-10-01—Filed