Application of aminotriazolethione compound serving as metal sulfide mineral surface modification agent
A technology of aminotriazolethione and surface modifier, which is applied in solid separation, flotation, etc., to achieve the effect of small dosage, efficient separation and enhanced hydrophilicity
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Embodiment 1
[0028] Preparation of thioformyl dihydrazine
[0029] Add a certain amount of hydrazine hydrate and 2-chloroethanol into a three-necked flask equipped with a stirrer, a thermometer, a dropping funnel, and a condenser, and place the three-necked flask in a constant temperature water bath at 0-5°C. Slowly add a certain amount of carbon disulfide dropwise, the dropwise addition is completed within 1 hour, and the temperature is controlled not to exceed 20°C until yellow crystals are precipitated. Add a certain amount of lye, heat up and reflux for several hours, and treat the tail gas with lye. After cooling to room temperature, an off-white product was obtained, which was filtered and dried to obtain thioformyl dihydrazine.
[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 to adjust the pH to 5-7, place the t...
Embodiment 2
[0034] Using 4-amino-1,2,4-triazole-5-thione as an inhibitor, the flotation separation experiment was carried out on copper-molybdenum mixed flotation coarse concentrate in a concentrator in Henan. Its test procedure is as follows Figure 4 As shown, 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 dihydrazine, 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 it to 100 At °C, an equivalent amount of citric acid (19.2 g) aqueous solution was started to be added dropwise. The dropwise addition was completed within 0.5h, and the temperature was refluxed for 2h. After the reaction was finished, the temperature was lowered and cooled, crystals were precipitated, filtered and washed with cold deionized water,
[0040] Dry to obtain a solid product. Calculated by thioformyl dihydrazide, the yield is 81%;
[0041] 4-Amino-3-(2-hydroxy-2,3-dicarboxy)propyl-1,2,4-triazole-5-thione product structure formula:
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