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2 115 621

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IPC

(21) (22)

Application

97108184/25, 1997-05-22

(22)

Actual filing date

1997-05-22

(45)

Published

1998-07-20

(72)

Inventor

Nasyrov G.Z.Nemets N.V.Tikhonov N.N.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Aljuminievo-Magnievyj Institut"

METHOD OF TREATING SODA-POTASH SOLUTIONS Russian patent published in 1998 - IPC

Abstract RU 2115621 C1

FIELD: non- ferrous metallurgy. SUBSTANCE: initial soda-potash solution having high molar index of potassium alkali is evaporated to density of 1.64-1.645 kg/l to precipitate double soda-potash salt which is dissolved with wash water, and the resulting solution is evaporated to precipitate anhydrous produced water. After recovery of soda, mother liquor is recycled to production cycle for mixing it with initial soda-potash solution after the latter has been subjected to concentrating evaporation. After recovery of double salt, mother liquor is cooled to 35240 C to precipitate produced sesquihydrate potash. After recovery of potash, mother liquor is recycled to production cycle to stage where double soda-potash salt is recovered. EFFECT: treatment of soda-potash solutions resulting from processing of high potassium nepheline ores. 4 cl

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RU 2 115 621 C1

Authors

Nasyrov G.Z.

Nemets N.V.

Tikhonov N.N.

Dates

1998-07-20—Published

1997-05-22—Filed

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