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Post-treatment method of sodium hydrosulfide finished product

A technology for sodium hydrosulfide and finished products, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of lack of clear documentation and lack of product approval, and achieve the goal of reducing raw material consumption, easy control, and improving product purity. Effect

Inactive Publication Date: 2019-04-09
SHANDONG JINDIAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our company uses the hydrogen sulfide produced by carbon disulfide to synthesize sodium hydrosulfide. The impurity carbon disulfide will react with sodium sulfide to form pink sodium trithiocarbonate or even sodium tetrathiocarbonate and sodium pentathiocarbonate. Downstream customers are interested in our company's products Lack of approval and no data clearly addressing how to remove carbon disulfide from hydrogen sulfide without consuming hydrogen sulfide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The finished product of 32% sodium hydrosulfide synthesized in the workshop, the color is orange-red, add 2.5% of the 40% industrial-grade hydrazine hydrate to the sample, heat to 85 degrees Celsius, keep for 4 hours, the product color is yellow-green, trisulfide The content of sodium carbonate is below 0.056%.

Embodiment 2

[0015] The 44% sodium hydrosulfide product synthesized in the workshop is orange-red in color. Add 3% of 40% industrial-grade hydrazine hydrate to the sample, heat it to 85 degrees Celsius and keep it warm for 4 hours, the color of the product is yellow-green, trisulfide The content of sodium carbonate is below 0.056%.

Embodiment 3

[0017] The finished product of 45% sodium hydrosulfide synthesized in the workshop is orange-red. Add 3% of 40% industrial-grade hydrazine hydrate to the sample. After heating to 85 degrees Celsius for 4 hours, the color of the product is yellow-green, trisulfide The content of sodium carbonate is below 0.056%.

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PUM

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Abstract

The invention provides a post-treatment method of a sodium hydrosulfide finished product. The post-treatment method is capable of removing influence of sodium trithiocarbonate, sodium tetrathiocvanateand sodium pentathiocarbonate on the color of the product; the treated sodium hydrosulfide can meet the requirements of industries such as fine chemicals and prevent the introduced new impurities from participating in reaction in the process of synthesizing the product in a downstream enterprise, so that the side effects of the downstream product can be reduced, the product purity can be improved, and the raw material consumption can be reduced. The post-treatment method of the sodium hydrosulfide finished product comprises the following steps: adding 0.2-3% of hydrazine hydrate and a derivative thereof into the finished product which is a sodium hydrosulfide solution and heating for 1-8 hours at 55-95 DEG C; the derivative of hydrazine hydrate is ammonia water or phenylamine.

Description

Technical field [0001] The invention relates to a production method of sodium hydrosulfide, in particular to a post-processing method of sodium hydrosulfide products, and belongs to the technical field of chemical industry. Background technique [0002] Sodium hydrosulfide is a new type of chemical raw material, which can be widely used in various industries. In the dye industry, it is used to synthesize organic intermediates and to prepare auxiliaries for sulfur dyes, and for the dehairing of hides and tanning in industry. The fertilizer industry is used to remove the monomer sulfur in the activated carbon. The mining industry is widely used in copper ore beneficiation, in the production of man-made fibers for sulfurous acid dyeing, etc. It is the raw material for the manufacture of ammonium sulfide and pesticide n-mercaptan semi-finished products, and also used in wastewater Processing etc. Our company uses hydrogen sulfide produced by carbon disulfide to synthesize sodium hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/32C01B17/36
CPCC01B17/32C01B17/36C01P2006/80
Inventor 孔嘉黄骄勇
Owner SHANDONG JINDIAN CHEM CO LTD
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