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2 502 671

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(51)

IPC

C01D5/00(2006-01-01)

(21) (22)

Application

2012129818/05, 2012-07-13

(24)

Start date

2012-07-13

(22)

Actual filing date

2012-07-13

(45)

Published

2013-12-27

(72)

Inventor

Badikova Al'Bina DarisovnaSharipov Tagir Vil'DanovichGimaev Ragib NasretdinovichKudasheva Florida KhusainovnaMustafin Akhat Gaziz'JanovichMusina Alsu Musaevna

(73)

Holder

Federal'Noe Gosudarstvennoe Bjudzhetnoe Obrazovatel'Noe Uchrezhdenie Vysshego Professional'Nogo Obrazovanija Gosudarstvennyj Universitet"

METHOD OF OBTAINING SODIUM SULFATE Russian patent published in 2013 - IPC C01D5/00

Abstract RU 2502671 C1

FIELD: chemistry.

SUBSTANCE: invention can be applied in chemical industry. Method of obtaining sodium sulfate includes interaction of waste sulfuric acid (WSA) - waste of olefin isobutene alkylation with 10-15% solution of sodium hydroxide. Preliminarily spent sulfuric acid is mixed with organic extractant, taken in weight ratio sulfuric acid: extractant = 1:1. As ectractant mixture of ethyl alcohol and tetrahydrofuran with weight ratio 1:1 is applied. Process of interaction is carried out at temperature 50-75°C to until pH of reaction mass reaches 7-8. After that, upper organic layer is separated, and lower water layer is evaporated, crystals of sodium sulfate are dried with obtaining target product.

EFFECT: invention makes it possible to extend raw material base of sodium sulfate production with obtaining high quality product with low content of residual quantity of organic substances.

1 tbl, 1 ex

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RU 2 502 671 C1

Authors

Badikova Al'Bina Darisovna

Sharipov Tagir Vil'Danovich

Gimaev Ragib Nasretdinovich

Kudasheva Florida Khusainovna

Mustafin Akhat Gaziz'Janovich

Musina Alsu Musaevna

Dates

2013-12-27—Published

2012-07-13—Filed