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Xanthic acid acyl ester collecting agent and preparation and application methods thereof

A technology of acyl xanthate and its application method, which is applied in the field of acyl xanthate collectors, can solve the problems of no acyl xanthate, improve flotation grade and recovery rate, and realize industrial production and operation simple effect

Active Publication Date: 2014-08-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant report on the application of xanthate acyl ester in sulfide ore flotation

Method used

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  • Xanthic acid acyl ester collecting agent and preparation and application methods thereof
  • Xanthic acid acyl ester collecting agent and preparation and application methods thereof
  • Xanthic acid acyl ester collecting agent and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The synthesis of embodiment 1 isobutyl xanthate acetyl ester

[0037] Add 15.70 parts of acetyl chloride and 32.68 parts of sodium isobutyl xanthate to 49 parts of solvent methylene chloride, stir and react at 20°C for 1.5 hours, remove sodium chloride by filtration, and obtain acetyl isobutyl xanthate and dichloromethane A mixed solution of methyl chloride, and then distilled under reduced pressure to remove the solvent to obtain the acetyl isobutyl xanthate product, the product yield based on acetyl chloride was 95.05%, and the purity was 84.56%. The product is characterized after being separated and purified by silica gel column chromatography. The infrared spectrum analysis and nuclear magnetic resonance analysis spectra of the product are shown in figure 1 with Figure 4 , see Table 1 and Table 2 for the data.

Embodiment 2

[0038] The synthesis of embodiment 2 isobutyl xanthate benzoyl esters

[0039] Add 28.11 parts of benzoyl chloride and 34.40 parts of sodium isobutyl xanthate to 64 parts of solvent methylene chloride, stir and react at 30°C for 2 hours, remove sodium chloride by filtration, and obtain benzoyl isobutyl xanthate and The mixed solution of dichloromethane is then distilled under reduced pressure to remove the solvent to obtain the isobutyl xanthate benzoyl ester product, the product yield based on benzoyl chloride is 97.40%, and the purity is 87.95%. The product is characterized after being separated and purified by silica gel column chromatography. The infrared spectrum analysis and nuclear magnetic resonance analysis spectra of the product are shown in figure 2 with Figure 5 , see Table 1 and Table 2 for the data.

Embodiment 3

[0040] The synthesis of embodiment 3 isobutyl xanthate octanoyl esters

[0041] Add 32.53 parts of octanoyl chloride and 36.12 parts of sodium isobutyl xanthate to 69 parts of solvent dichloromethane, stir and react at 35°C for 2 hours, remove sodium chloride by filtration, and obtain octanoyl isobutyl xanthate and dichloromethane The mixed solution, and then the solvent was removed by distillation under reduced pressure to obtain the octanoyl isobutyl xanthate product, the product yield based on octanoyl chloride was 95.27%, and the purity was 86.42%. The product is characterized after being separated and purified by silica gel column chromatography. The infrared spectrum analysis and nuclear magnetic resonance analysis spectra of the product are shown in image 3 with Image 6 , see Table 1 and Table 2 for the data.

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PUM

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Abstract

The invention discloses a xanthic acid acyl ester collecting agent and preparation and application methods thereof. The preparation method comprises the steps that alkyl xanthogenate and acyl chloride are taken as raw materials and react for 1-4 h under a reaction temperature 10-50 DEG C to generate xanthic acid acyl ester. According to the preparation method, the reaction operation is simple, no waste water is generated, and the product yield coefficient is high; a xanthic acid acyl ester collecting agent has stronger collecting capacity and selectivity for sulphide ores such as copper sulphide ores, lead zinc ores and copper molybdenum ores precious metal ores as well as associated gold and silver precious metal ores, and better flotation indexes are obtained in the flotation test process.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and relates to a xanthate acyl ester collector and a preparation and application method thereof. Background technique [0002] Xanthate collectors are derivatives of xanthate (xanthate), where sodium (or potassium) ions in xanthate molecules are replaced by hydrocarbon groups or hydrocarbon-based substitutes. This type of collector is generally an oily liquid, with polarity in the molecule and low solubility in water. It is a good collector for sulfide ores, and is often used in the flotation of non-ferrous metal ores and precious metal ores, such as copper-bearing ores, Ores containing molybdenum, or containing gold or silver precious metals. Xanthate compounds have excellent chelation effects on metal ions such as copper, gold, and silver, and have better selectivity than conventional sulfide ore collectors such as xanthate and black powder, and can achieve effective extraction unde...

Claims

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Application Information

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IPC IPC(8): B03D1/012C07C329/16B03D101/02
Inventor 钟宏王帅贾辉卢毅屏马鑫刘广义曹占芳
Owner CENT SOUTH UNIV
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