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A kind of n-alkylhydroxamic acid-dithiocarbamate collector, its preparation and application

A technology of dithiocarbamate and alkylhydroxamic acid, which is applied in the field of metal ore flotation, and can solve the problem of N-alkylhydroxamic acid-dithiocarbamate compounds, etc. problems, achieve good flotation performance, wide application range, and enhance the effect of adsorption

Active Publication Date: 2019-12-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But there is no N-alkyl hydroxamic acid-dithiocarbamate compound, and its preparation and flotation application report

Method used

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  • A kind of n-alkylhydroxamic acid-dithiocarbamate collector, its preparation and application
  • A kind of n-alkylhydroxamic acid-dithiocarbamate collector, its preparation and application
  • A kind of n-alkylhydroxamic acid-dithiocarbamate collector, its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Example 1 Preparation of N-(4-butyl hydroxamic acid)-S-n-octyl dithiocarbamate

[0066] Slowly add 9.14 parts of carbon disulfide to the mixed solution of 12.98 parts of 4-aminobutyl hydroxamic acid and 18 parts of methanol under stirring, keep the temperature of the reaction solution below 10°C during the dropping process, and stir at 10°C after the addition After reacting for 4 hours, add 5.42 parts of sodium hydroxide solid particles in batches, then add 19.3 parts of n-octane bromide under stirring at 15°C, and then stir and react at 15°C for 15 hours. Then lower the temperature to below 5°C, add concentrated sulfuric acid to acidify to a pH of about 4. Filtration, the filtrate was distilled under reduced pressure, washed with water, and dried to obtain a white solid, which was N-(4-butylhydroxamic acid)-S-n-octyl dithiocarbamate, based on bromo-n-octane The yield was 88.6%.

Embodiment 2

[0067] Example 2 Preparation of N-(6-hexyl hydroxamic acid)-S-dodecyl dithiocarbamate

[0068] Slowly add 9.14 parts of carbon disulfide to the mixed solution of 16.06 parts of 6-aminohexylhydroxamic acid and 18 parts of methanol under stirring, keep the temperature of the reaction solution below 10°C during the dropping process, and stir the reaction at 10°C after the addition After 4 hours, add 5.42 parts of sodium hydroxide solid particles in batches, then add 24.9 parts of dodecane bromide under stirring at 20°C, and then stir and react at 20°C for 15 hours. Then lower the temperature to below 5°C, add concentrated sulfuric acid to acidify to a pH of about 4. Filtration, the filtrate was distilled under reduced pressure, washed with water, and dried to obtain a white solid, which was N-(6-hexylhydroxamic acid)-S-dodecyl dithiocarbamate, based on bromododecane The yield was 89.3%.

Embodiment 3

[0069] Example 3 Preparation of N-(2-ethylhydroxamic acid)-S-benzyl dithiocarbamate

[0070] Add 9.0 parts of 2-aminoglyoxamic acid to a mixed solution of 12.7 parts of benzyl chloride, 8.36 parts of carbon disulfide, and 30 parts of PEG-200 under stirring at 20°C, and then stir and react at 20°C for 2 hours. After the reaction, the temperature was lowered to below 5°C, and then 100 parts of water were added to the reaction flask to obtain a white solid, which was N-(2-ethylhydroxamic acid)-S-benzyl dithiocarbamate. The yield based on benzyl chloride was 82.2%.

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Abstract

The invention discloses an N-alkylhydroxyoxime acid-aminodithioformic acid ester collecting agent which comprises a hydroximic acid fragment and an aminodithioformic acid ester fragment. The invention further discloses a preparation method and application of the N-alkylhydroxyoxime acid-aminodithioformic acid ester collecting agent. An aminodithioformic acid ester functional group and an alkylhydroxyoxime acid functional group in the flotation collecting agent has the effect of metal ion synergy chelation,, the absorption effect of the metallic ions on the interface of the metallic mineral can be strengthened; and at the same time, the flotation collecting agent contains double dewatering functional groups, mineral grain dewatering can be strengthened, and the flotation recovering rate of the metallic mineral in metal ore is strengthened.

Description

technical field [0001] The invention relates to a collector with a new structure—N-alkylhydroxamic acid-dithiocarbamate compound, its preparation and its application method in metal ore flotation. Background technique [0002] Flotation is the most important method for recovering metal minerals from metal ores. Flotation collectors selectively regulate the hydrophobicity of mineral interfaces, which is one of the key technologies for the separation and extraction of valuable mineral components by flotation. With the increasingly poor, fine and miscellaneous metal mineral resources, the flotation recovery of metal minerals is more difficult. The development of new high-efficiency flotation collectors and the improvement of the hydrophobicity of mineral particles are of great significance for improving the comprehensive recovery rate of metal minerals. [0003] Dithiocarbamate compounds and hydroxamic acid compounds have become important metal mineral flotation collectors. Di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012C07C333/20B03D101/02B03D103/02
CPCB03D1/012B03D2201/02B03D2203/02C07C333/20
Inventor 刘广义刘胜钟宏曹占芳王帅
Owner CENT SOUTH UNIV
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