A kind of production method of high-grade sodium thioglycolate powder

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...

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 and other problems, the sodium thioglycolate produced by this method is in the form of powder and has no "three wastes". It is a green and environmentally friendly product, which fills the gap in the country, enables the product to be upgraded, and takes a step forward in scientific research and technological innovation.