Production method of high-grade sodium thioglycollate powder

A technology of sodium thioglycolate and its production method, which is applied in the field of production of high-grade sodium thioglycolate powder, can solve the problems of low product grade, high packaging costs, and high freight costs, and achieve the goals of reducing packaging costs, long shelf life, and reducing transportation costs Effect

Active Publication Date: 2016-01-06
SHAANXI HUAGUANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a production method of high-grade sodium thioglycolate powder for the above-mentioned deficiencies in the prior art, which solves the problems of low product grade, high freight and high packaging costs in the prior art And easy oxidation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:

[0025] Step 1, salt formation: mix chloroacetic acid and deionized water uniformly at a mass ratio of 1:1.8 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix uniformly to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 55% of described chloroacetic acid quality;

[0026] Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then heat up to 80°C at a heating rate of 0.5°C / min to obtain a condensate; the sodium thiosulfate The addition is 2.8 times of the quality of the chloroacetic acid;

[0027] Step 3, sulfhydration: Add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 20°C at a cooling rate of 3°C / min to obtain a sulfhydration product; the amount of sodi...

Embodiment 2

[0031] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:

[0032] Step 1, salt formation: mix chloroacetic acid and deionized water uniformly in a mass ratio of 1:1.6 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix uniformly to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 50% of described chloroacetic acid quality;

[0033] Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then raise the temperature to 60°C at a heating rate of 0.6°C / min to obtain a condensate; the sodium thiosulfate The addition is 3.0 times of the quality of the chloroacetic acid;

[0034] Step 3, sulfhydration: Add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 20°C at a cooling rate of 2.5°C / min to obtain a sulfhydration product; th...

Embodiment 3

[0038] The production method of the high-grade sodium thioglycolate powder of the present embodiment comprises the following steps:

[0039] Step 1, salt formation: mix chloroacetic acid and deionized water in a mass ratio of 1:2.0 to obtain a chloroacetic acid solution, then add sodium carbonate to the chloroacetic acid solution, and mix well to obtain a sodium chloroacetate solution; The add-on of described sodium carbonate is 60% of described chloroacetic acid quality;

[0040]Step 2. Condensation: Add sodium thiosulfate to the sodium chloroacetate solution described in step 1, mix well and then raise the temperature to 90°C at a heating rate of 1.0°C / min to obtain a condensate; the sodium thiosulfate The addition is 2.6 times of the quality of the chloroacetic acid;

[0041] Step 3, sulfhydration: add sodium hydroxide to the condensate described in step 2, mix evenly and cool down to 5°C at a cooling rate of 5°C / min to obtain a sulfhydration product; the amount of sodium ...

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PUM

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Abstract

The invention provides a production method of high-grade sodium thioglycollate powder. The production method comprises the following steps of firstly, uniformly mixing chloroacetic acid and deionized water according to the mass ratio to obtain a chloroacetic acid solution, then adding sodium carbonate into the chloroacetic acid solution, and uniformly mixing to obtain a sodium chloroacetate solution; secondly, adding sodium thiosulfate into the sodium chloroacetate solution, uniformly mixing and then carrying out temperature-rise condensation to obtain a condensation compound; thirdly, adding sodium hydroxide into the condensation compound, uniformly mixing and then carrying out temperature-reduced mercaptoethylation to obtain a mercaptoethylation product; fourthly, carrying out vacuum drying treatment on the mercaptoethylation product to obtain the high-grade sodium thioglycollate powder. According to the production method provided by the invention, the problems about low grade of products, high transportation expenses, high packing expenses, easiness in oxidation and the like existing the prior art are solved; sodium thioglycollate produced by the production method provided by the invention is in a powder shape and does not generate three wastes; the grade of the product is over 35 percent; the high-grade sodium thioglycollate powder belongs to a green environment-friendly product.

Description

technical field [0001] The invention belongs to the technical field of preparation of mineral dressing agents, and in particular relates to a production method of high-grade sodium thioglycolate powder. Background technique [0002] Sodium Thioglycolate, also known as Sodium Thioglycolate, has the molecular formula HSCH 2 COONa (abbreviated as STG), the molecular weight is 114.09, pure sodium thioglycolate is white powdery crystal, sometimes slightly pink, non-flammable and explosive, easy to deliquescence, easily soluble in water, slightly soluble in alcohol, and needs to be sealed away from light save. In copper-molybdenum ore flotation applications, it is used as a depressant for copper minerals and pyrite. It has obvious inhibitory effect on copper, sulfur and other substances, thus effectively improving the grade of molybdenum concentrate. It can completely replace the highly toxic inhibitor sodium cyanide. [0003] At present, there are four main production process...

Claims

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Application Information

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IPC IPC(8): C07C319/02C07C323/52
Inventor 冯卫国孙胜奇宋江刘卫峰吴庆伟刘冰冰
Owner SHAANXI HUAGUANG IND
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