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Phenylpropenyl hydroxamate, preparation method thereof and application thereof to tungsten ore flotation

A technology of phenylpropenyl hydroxamic acid and propenyl hydroxamic acid, which is applied to phenylpropenyl hydroxamic acid and its preparation, and the application field of tungsten ore flotation, can solve the problem of high cost of reagents, weak collection ability, choice of It can reduce the cost of beneficiation, have strong nucleophilicity, and be easy to operate.

Active Publication Date: 2018-08-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most collectors for tungsten flotation have problems and deficiencies such as sensitivity to slime, weak collection capacity, poor selectivity, and high reagent cost.

Method used

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  • Phenylpropenyl hydroxamate, preparation method thereof and application thereof to tungsten ore flotation
  • Phenylpropenyl hydroxamate, preparation method thereof and application thereof to tungsten ore flotation
  • Phenylpropenyl hydroxamate, preparation method thereof and application thereof to tungsten ore flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of phenylpropenyl hydroxamic acid

[0025] Pour 90mL of distilled water into a 500mL three-necked flask, heat at a constant temperature in an oil bath at 30°C, and condense and reflux at room temperature; first, take 8.34 parts of hydroxylamine hydrochloride and add it to the three-necked flask, then add 8.8 parts of sodium hydroxide in three batches, and the reaction time is 30 minutes; Hydroxylamine is fully free; add methyl phenylacrylate of the structure shown in formula-II into the free liquid, and then heat the reaction system in a constant temperature oil bath at 50°C for 4 hours. After the reaction, the resulting reaction solution is acidified with sulfuric acid to obtain phenylpropylene The crude product of phenylpropenyl hydroxamic acid; the crude product is dissolved in hot water, cooled, filtered, and purified in this way for 2 to 3 times to obtain high-purity phenylpropenyl hydroxamic acid. The reaction process is shown in form...

Embodiment 2

[0027] Example 2: Comparison of the flotation performance of phenylpropenyl hydroxamic acid collectors and other hydroxamic acid collectors on black tungsten pure minerals

[0028] The flotation test was carried out by XFGⅡ hanging tank flotation machine. The feeding particle size of black tungsten pure mineral is 0.074mm~0.038mm. First, add 2g of pure minerals and 35mL of distilled water to the flotation cell, stir and adjust the slurry for 1min; then use hydrochloric acid or NaOH to adjust the pH of the slurry to the value set in Table 1 and Table 2, and stir for 2min; then, add the activator Pb (NO 3 ) 2 44mg / L, the action time is 5min, the collector hydroxamic acid, the action time is 3min, the foaming agent MIBC15mg / L, the action time is 1min, and finally inflated and scraped for 5min; after the flotation test, the foam product is filtered and dried , Weigh and calculate the recovery rate. The detailed test process and pharmaceutical system are as follows: figure 1 As...

Embodiment 3

[0033] Example 3: Comparison of the flotation performance of phenylpropenyl hydroxamic acid collectors and other hydroxamic acid collectors on scheelite pure minerals

[0034] The flotation test was carried out by XFGⅡ hanging tank flotation machine. The feed particle size of scheelite pure mineral is 0.074mm~0.038mm. First, add 2g of pure minerals and 35mL of distilled water to the flotation tank, stir and adjust the slurry for 1min; then use hydrochloric acid or NaOH to adjust the pH of the slurry to the set value, and stir for 2min; then, add collector hydroxamic acid in sequence for 3min , foaming agent MIBC15mg / L, action time 1min, and finally inflated and scraped for 5min; after the flotation test, the foam product was filtered, dried, weighed, and the recovery rate was calculated. The test process and drug system are as follows: figure 2 As shown, the test results are shown in Table 3 and Table 4.

[0035] Table 3 hydroxamic acid is to the flotation performance test...

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Abstract

The invention relates to the field of flotation, in particular to phenylpropenyl hydroxamate, a preparation method thereof and application thereof to tungsten ore flotation. The preparation method ofphenylpropenyl hydroxamate comprises the following steps: preparing raw materials; preparing hydroxylamine hydrochloride and a sodium hydroxide solution; preparing a crude product of phenylpropenyl hydroxamate; and purifying phenylpropenyl hydroxamate. The optimum pH of phenylpropenyl hydroxamate in ore pulp is close to neutral, so that the flotation is easy to operate, the burden on workers is lowered, chemicals are saved, and the flotation cost is decreased.

Description

technical field [0001] The invention relates to the field of flotation, in particular to a phenylpropenyl hydroxamic acid and its preparation method and application in tungsten ore flotation. Background technique [0002] Tungsten is one of the most important strategic resources, and its industrial development is related to the lifeline of the national economy and national defense security. my country is the world's largest tungsten resource country, accounting for nearly 62% of the world's tungsten resource reserves, but at the same time, my country is also the world's largest tungsten resource supplier, supplying about 80% of the world's tungsten resources for a long time, resulting in my country's existing tungsten resources There is a serious mismatch between resource reserves and supply. In my country, black tungsten is mainly recovered by gravity separation, but the recovery rate of black tungsten fine slime by gravity separation is only below 45%, and the loss of tung...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C259/06B03D1/016
CPCB03D1/016B03D2201/02B03D2203/04C07C259/06
Inventor 余新阳王礼平胡琳琪王浩林王强强黄志强何桂春
Owner JIANGXI UNIV OF SCI & TECH
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