Nipalgin hydroximic acid as well as preparation method thereof and application thereof in tungsten ore flotation

A technology of paraben hydroxamic acid and paraben hydroxime, which is applied in flotation, solid separation, organic chemistry and other directions, can solve the problems of weak collecting ability, high cost of chemicals, poor selectivity, etc., and achieves nucleophilicity. Strong, reduce the cost of beneficiation, the effect of firm adsorption

Inactive Publication Date: 2018-09-07
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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  • Nipalgin hydroximic acid as well as preparation method thereof and application thereof in tungsten ore flotation
  • Nipalgin hydroximic acid as well as preparation method thereof and application thereof in tungsten ore flotation
  • Nipalgin hydroximic acid as well as preparation method thereof and application thereof in tungsten ore flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of paraben 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, and then add 8.8 parts of sodium hydroxide in 3 batches within 30 minutes. After 30 minutes, hydroxylamine is fully dissociated; add methylparaben with the structure shown in formula-II to the free solution, and then heat the reaction system in a constant temperature oil bath at 60°C for 4 hours. After the reaction is completed, acidify the obtained reaction solution with sulfuric acid , to obtain the crude product of paraben hydroxamic acid; dissolve the crude product in absolute ethanol at 70°C, then slowly add 70°C distilled water dropwise, and keep stirring, stop the dropwise addition after white insoluble matter appears, and add A drop of absolute eth...

Embodiment 2

[0027] Example 2: Comparison of the flotation performance of paraben hydroxamic acid and other hydroxamic acids 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, action time 5min, collector hydroxamic acid, action time 3min, foaming agent No. 2 oil 15mg / L, action time 1min, finally inflated and scraped for 5min; after the flotation test, the foam product was filtered , drying, weighing, and calculating the recovery rate. The detailed test process and pharmaceutical system are as follows: figure 1 As shown, the test results are shown in Table 1 and ...

Embodiment 3

[0033] Example 3: Comparison of the flotation performance of paraben hydroxamic acid and other hydroxamic acids on pure scheelite 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 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 3 and Table 4, and stir for 2min; then, add the collector hydroxime in sequence Acid, action time 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 performanc...

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Abstract

The invention relates to the field of flotation, in particular to nipalgin hydroximic acid as well as a preparation method thereof and application thereof in tungsten ore flotation. The preparation method of the nipalgin hydroximic acid comprises the following four steps: preparing raw materials; preparing hydroxylamine hydrochloride and a sodium hydroxide solution; preparing a nipalgin hydroximicacid crude product; purifying the nipalgin hydroximic acid. The nipalgin hydroximic acid provided by the invention has a higher collecting ability, is suitable for flotation of refractory fine-particle oxidized ore, can improve the flotation effect and indexes of mineral dressing, saves reagents and lowers the mineral dressing cost.

Description

technical field [0001] The invention relates to the field of flotation, in particular to a paraben hydroxamic acid, a preparation method thereof and an 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 tungs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C259/10B03D1/016B03D101/02B03D103/04
CPCC07C259/10B03D1/016B03D2201/02B03D2203/04
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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