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Method for producing reagent grade sodium sulfate by using white carbon black mother solution

A technology of white carbon black and reagent grade, which is applied in the field of producing reagent grade sodium sulfate by using white carbon black mother liquid water, which can solve the problems of wasting sodium sulfate resources and polluting the environment, and achieves low impurity content, high quality and low water content Effect

Inactive Publication Date: 2013-05-08
福建海能新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, most white carbon black manufacturers dilute the white carbon black mother liquor with water and discharge it, which not only pollutes the environment but also wastes precious sodium sulfate resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0016] The method utilizing white carbon black mother liquor water to produce reagent grade sodium sulfate comprises the steps:

[0017] 1) Use a mixed cellulose microporous filter membrane (Φ≤0.15μm) to remove a small amount of solid residues such as white carbon black in the white carbon black mother liquor water from the white carbon black mother liquor water, and initially purify it into a sodium sulfate solution; 2) Take steps 1) The obtained 4L sodium sulfate solution was treated with a chelating resin to obtain a pure sodium sulfate solution with a percentage concentration of 5.6%. The chelating resin used Lanxiao Technology LSC-500 aminophosphonic acid resin, and its total exchange capacity was 1.95Mmol / g (dry), water content is 52-58%; 3) the percentage concentration that step 2) obtains is that the pure sodium sulfate solution of 5.6% obtains percentage concentration through electrodialysis concentration and is the pure sodium sulfate solution of 20%, used for electro...

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Abstract

The invention discloses a method for producing reagent grade sodium sulfate by using a white carbon black mother solution. The method comprises the following steps of: 1) removing a little amount of solid residue such as white carbon black and the like in the white carbon black mother solution by using a mixed cellulose micropore filtration membrane with thickness phi of less than or equal to 0.15 micron, and preliminarily purifying the white carbon black mother solution into a sodium sulfate solution; 2) treating the sodium sulfate solution obtained in the step 1) by using chelating resin toobtain a 5 to 6 percent pure sodium sulfate solution; 3) performing electrodialytic concentration on the 5 to 6 percent pure sodium sulfate solution obtained in the step 2) to obtain a 15 to 25 percent pure sodium sulfate solution; and 4) performing multi-effect evaporation on the 15 to 25 percent pure sodium sulfate solution obtained in the step 3) to obtain crystal, separating the crystal by using a centrifuge, drying the separated crystal at the temperature of 120 DEG C, and thus obtaining a finished product. The sodium sulfate product prepared by the method has the characteristics of low impurity content, high quality, low moisture content and the like, and is a high reagent grade sodium sulfate product.

Description

technical field [0001] The invention belongs to a method for producing sodium sulfate, in particular to a method for producing reagent-grade sodium sulfate by utilizing white carbon black mother liquor water. Background technique [0002] Anhydrous sodium sulfate is an important inorganic chemical product, mainly used in the manufacture of chemical products such as sodium sulfide, sodium silicate, caustic soda, sodium silicate; , tanning, synthetic fiber, synthetic detergent and pharmaceutical industries are also widely used, and the market demand is very large. At present, the production of industrial-grade anhydrous sodium sulfate is mainly prepared by dissolving, filtering, evaporating, and drying the nitrate mud in the natural salt lake. Because the nitrate mud in the salt lake contains a large amount of calcium, magnesium, iron, and chlorine, it is easy to pass through The industrial sodium sulfate product prepared by this method has high impurity content, high product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D5/16
Inventor 周海波
Owner 福建海能新材料有限公司
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