Production process of large grain anhydrous sodium sulfate with natural salt lake mirabilite

Inactive Publication Date: 2007-06-27
乌鲁木齐市华高商贸有限公司
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  • Abstract
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Problems solved by technology

At present, the method of producing anhydrous sodium sulfate from natural salt lake mirabi

Method used

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Embodiment Construction

[0008] Collect natural salt lake Glauber's salt raw materials, go through the processes of washing, melting, refining, settling, and neutralizing with sulfuric acid to obtain 120 cubic meters of clearing liquid, add 3 cubic meters of surfactant stock solution to the clearing liquid, and stir evenly. , followed by forced evaporation. When evaporating to a solid-liquid ratio of 1:3, carry out centrifugal dehydration, hot air drying, and finally make anhydrous sodium sulfate finished product. The surfactant stock solution is uniformly prepared by mixing sodium dodecylbenzenesulfonate, sodium ethoxylated alkylsulfate and warm water at about 40°C. The mixing ratio is: to prepare 3 cubic meters of surfactant stock solution, 300 kilograms of solids with a sodium dodecylbenzenesulfonate content of 60%, 600 kilograms of emulsions with a content of 90% of ethoxylated alkyl sodium sulfate, and the rest for water.

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Abstract

The production process of large grain anhydrous sodium sulfate with natural salt lake mirabilite includes the steps of washing mirabilite, decomposing mirabilite, refining, settlement, neutralizing with sulfuric acid to obtain clear solution, evaporating, centrifuging to dewater, and drying with hot blast to obtain product. It features the addition of surfactant solution comprising sodium dodecyl benzene sulfonate, sodium ethoxy alkyl sulfate and warm water at about 40deg.c into the clear solution before evaporating. The production process can produce anhydrous sodium sulfate of granularity of 200-1000 microns and with high economic value.

Description

1. Technical field [0001] The invention relates to a production method of anhydrous sodium sulfate, in particular to a method for producing large particle anhydrous sodium sulfate from natural salt lake mirabilite. 2. Background technology [0002] Anhydrous sodium sulfate, also known as Yuanmingfen, is a chemical raw material. At present, the method of producing anhydrous sodium sulfate by using natural salt lake mirabilite is: through the processes of washing nitrate, nitrate, refining, settling, adding acid, evaporating, centrifugal dehydration, and hot air drying to make a finished product. For example, the full-dissolution evaporation dehydration method pointed out in the book "Salt Chemical Technology" (the first edition of the first edition in December 1988, ISBN-5019-0516-9 / TS.355) published by Light Industry Press: from the salt lake The incoming Glauber's salt is separated from the large stones and mud at the feeding place and then enters the silo. After the mater...

Claims

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Application Information

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IPC IPC(8): C01D5/02
Inventor 黄伟张志刚冉龙
Owner 乌鲁木齐市华高商贸有限公司
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