Preparation method of xanthic acid alkyl hydroxamic acid ester

A technology of xanthate alkyl hydroxamate and xanthate, which is applied in the field of preparation of xanthate alkyl hydroxamate, can solve the problem that it is difficult to extract copper sulfide and copper oxide at the same time, the cost of medicine is high, and the Oxidized ore collectors are few and other problems, so as to achieve the effect of easy operation, efficient recovery and quality improvement

Pending Publication Date: 2021-10-08
YUNNAN COPPER CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a kind of preparation method of xanthate alkyl hydroxamate, to solve the problem that conventional collectors in the existing mixed copper ore flotation are

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  • Preparation method of xanthic acid alkyl hydroxamic acid ester
  • Preparation method of xanthic acid alkyl hydroxamic acid ester

Examples

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Example Embodiment

[0025] The invention provides a preparation method of xanthate alkyl hydroxamate, which comprises the following steps:

[0026] Step (1): place the xanthate in a beaker, add distilled water or dehydrated ethanol, and heat in a water bath under agitation to dissolve the xanthate quickly and thoroughly;

[0027] Step (2): add a certain amount of carbonic acid and vitriol oil in the dissolved xanthate solution, make xanthate and carbonic acid generation dehydration reaction, generate medicament, and its reaction formula is as follows:

[0028] where R is selected from C 1 -C 5 alkyl, such as methyl, ethyl, propyl, butyl, isobutyl, pentyl, isopentyl, neopentyl.

[0029] When adding a certain amount of oxalic acid and concentrated sulfuric acid to the dissolved xanthate solution. , dehydration reaction of xanthate and oxalic acid occurs to generate medicament, and its reaction formula is as follows:

[0030] where R is selected from C 1 -C 5 alkyl, such as methyl, ethyl, ...

Example Embodiment

[0051] Example 1

[0052] Put 172.12g of sodium butylxanthate into a 500ml beaker, add 150ml of distilled water, heat and dissolve in a water bath for 40min under the conditions of a magnetic stirring speed of 250r / min and a temperature of 60°C to prepare a sodium butylxanthate solution. Then, 25.62ml (98% concentration) of concentrated sulfuric acid and 90g of oxalic acid were added dropwise to the solution at a rate of 2 drops / second, and the reaction was maintained for 18h under the conditions that the reaction temperature was 105°C and the stirring speed of the magnetic stirrer was 250r / min. . Transfer the reacted product to a separatory funnel and let it stand for 5 hours, then take the organic phase and wash the organic phase three times with distilled water. Then, 69.45g of hydroxylamine hydrochloride and 40g of sodium hydroxide were added to the filtered organic phase (xanthogen acid sulfuric anhydride), and the reaction temperature was maintained at 70°C and the stir...

Example Embodiment

[0053] Example 2

[0054] Put 15.61g of sodium butylxanthate into a 500ml beaker, add 150ml of absolute ethanol, heat and dissolve it in a water bath for 40min under the conditions of a magnetic stirring speed of 250r / min and a temperature of 60°C to prepare sodium butylxanthate solution. Then, 2.56 ml (98% concentration) of concentrated sulfuric acid and 9.0 g of oxalic acid were added dropwise to the solution at a rate of 2 drops / second, and the reaction was maintained under the conditions that the reaction temperature was 60 °C and the stirring speed of the magnetic stirrer was 250 r / min. 18h. Transfer the reacted product to a separatory funnel and let it stand for 5 hours, then take the organic phase and wash the organic phase three times with distilled water. Then, 7g of hydroxylamine hydrochloride and 4g of sodium hydroxide were added to the filtered organic phase (xanthogen sulfuric anhydride), and the reaction was maintained for 18h under the condition that the react...

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Abstract

The invention relates to a preparation method of xanthic acid alkyl hydroxamic acid ester. The method comprises the following steps: heating and dissolving xanthate in distilled water or absolute ethyl alcohol, adding carbonic acid (or oxalic acid) and concentrated sulfuric acid to react, standing, taking an organic phase, cleaning with distilled water, and adding hydroxylamine hydrochloride and sodium hydroxide. According to the invention, the prepared collecting agent can well recover copper sulfide and copper oxide in mixed ore while reduce collecting of pyrite and other gangue minerals as much as possible, improves the grade and the recycling rate of flotation copper concentrate of the mixed copper ore, and avoids the problems of difficulty in dispensing, large field investment and inconvenience in inventory management caused by mixed medication.

Description

technical field [0001] The invention belongs to the technical field of organic medicament synthesis, and in particular relates to a preparation method of xanthate alkyl hydroxamate. Background technique [0002] Mixed copper ore is mainly a mixed ore body of copper sulfide and copper oxide. At present, the flotation technology for copper sulfide is relatively mature at home and abroad, but for copper oxide ore, the conventional flotation methods are mainly: direct flotation, sulfide flotation method and chemical beneficiation method. The most widely used in practice is the sulfidation flotation method, which requires the sulfidation of copper oxide first. Therefore, incomplete sulfidation often occurs, resulting in a large amount of copper oxide ore not being effectively recovered, which is lost in the tailings, resulting in a sharp drop in the recovery rate of copper. [0003] The flotation of copper sulfide ore mainly uses xanthate and black medicine sulfide ore collecto...

Claims

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Application Information

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IPC IPC(8): C07C329/06B03D1/012B03D101/02B03D103/02
CPCC07C329/06B03D1/012B03D2201/02B03D2203/02Y02P10/20
Inventor 周仕庆郭芸杉田小松蒋太国朱艳芬
Owner YUNNAN COPPER CO LTD
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