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Application of aminotriazolethione compounds as surface modifiers of metal sulfide minerals

A technology of aminotriazole thione and surface modifier, applied in solid separation, flotation and other directions, to achieve the effect of enhancing hydrophilicity, small dosage, and efficient separation

Active Publication Date: 2019-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only the reports that aminotriazolethione heterocyclic compounds can be used as flotation collectors are mentioned in the literature; however, there are no reports showing that such compounds can be used as inhibitors for the separation of molybdenum sulfide and non-molybdenum sulfide minerals. agent

Method used

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  • Application of aminotriazolethione compounds as surface modifiers of metal sulfide minerals
  • Application of aminotriazolethione compounds as surface modifiers of metal sulfide minerals
  • Application of aminotriazolethione compounds as surface modifiers of metal sulfide minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of thioformyl dihydrazide

[0029] A certain amount of hydrazine hydrate and 2-chloroethanol were added to the three-necked flask equipped with a stirrer, a thermometer, a dropping funnel and a condenser, and the three-necked flask was placed in a constant temperature water bath at 0-5°C. A certain amount of carbon disulfide was slowly added dropwise, and the dropwise addition was completed within 1 h, and the temperature was controlled not to exceed 20 °C until yellow crystals were precipitated. A certain amount of lye is added, the temperature is raised and refluxed for several hours, and the tail gas is treated with lye. Cool to room temperature to obtain off-white product, which is filtered and dried to obtain thioformyl dihydrazide.

[0030] Preparation of 4-amino-1,2,4-triazole-5-thione

[0031]In a 250mL three-necked flask, add 0.1mol (10.6g) of thioformyl dihydrazide, add a certain amount of deionized water, and add concentrated hydrochloric acid t...

Embodiment 2

[0034] Using 4-amino-1,2,4-triazole-5-thione as an inhibitor, the flotation separation test of copper-molybdenum mixed flotation coarse concentrate in a processing plant in Henan was carried out. Its test procedure is as follows Figure 4 The results are shown in Table 1.

[0035] Table 1. 4-Amino-1,2,4-triazole-5-thione flotation test results

[0036]

Embodiment 3

[0038] Preparation of 4-amino-3-(2-hydroxy-2,3-dicarboxy)propyl-1,2,4-triazole-5-thione

[0039] In a 250mL three-necked flask, add 0.1mol (10.6g) of thioformyl dihydrazide, add a certain amount of deionized water, and add concentrated hydrochloric acid to adjust the pH to 5-7, place the three-necked flask in a water bath and heat to 100 At °C, the dropwise addition of an equivalent amount of an aqueous solution of citric acid (19.2 g) was started. The dropwise addition was completed within 0.5h, and the temperature was refluxed for 2h. After the reaction is completed, the temperature is cooled to separate out crystals, and the product is filtered and washed with cold deionized water,

[0040] Dry to obtain a solid product. Calculated based on thioformyl dihydrazide, the yield is 81%;

[0041] 4-Amino-3-(2-hydroxy-2,3-dicarboxy)propyl-1,2,4-triazole-5-thione Product structural formula:

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Abstract

The invention discloses application of an aminotriazolethione compound serving as a metal sulfide mineral surface modification agent. The aminotriazolethione compound comprises a hydrophilic modification perssad and an aminotriazolethione perssad at the same time. The aminotriazolethione compound mainly serves as the non-molybdenum sulfide mineral surface modification agent for flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral, the hydrophilia of the surfaces of the sulfide minerals with the natural hydrophobicity can be enhanced, especially, the hydrophilia of the surfaces of copper pyrites, chalcocite, galena, blende, brasses, the bismuth sulfide mineral and other non-molybdenum sulfide minerals can be effectively improved, and efficient flotation separation of the molybdenum sulfide mineral and the non-molybdenum sulfide mineral is achieved.

Description

technical field [0001] The invention relates to an application method of an aminotriazolethione compound, in particular to the application of a triazolethione compound modified by a hydrophilic group as a surface modifier for non-molybdenum sulfide minerals, belonging to the technical field of mineral processing. Background technique [0002] 1,2,4-Triazole derivatives are a very important series of compounds in the thiocarbohydrazide derivatives family. The preparation and application of their derivatives have attracted the attention of many researchers. Thiocarbohydrazides can prepare nitrogen, oxygen and sulfur-containing heterocyclic compounds. These compounds and their transition metal complexes have special properties, and current research has involved many fields, such as biological activity, nonlinear optical properties (NLO), optoelectronic properties, corrosion resistance, heavy metal ion adsorbents, catalysts and preparation of nano Material. Therefore, the synt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012B03D101/06B03D103/02
CPCB03D1/012B03D2201/06B03D2203/02
Inventor 孙伟殷志刚胡岳华张谌虎管青军
Owner CENT SOUTH UNIV
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