Use of diester isosulfocyanate in sulphide ore floation and preparation method thereof

A technology of diester group diisothiocyanate and diester group dithiocarbamate, which is applied in the field of preparation of such compounds, can solve the problems of poor selectivity and low level of comprehensive utilization of sulfide ores, and achieve simple preparation process, Good selectivity, efficient flotation separation effect

Inactive Publication Date: 2011-04-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a kind of diester group diisothiocyanate derivatives as a new high-efficiency collector for sulfide ore flotation, to overcome the poor selectivity of traditional sulfide ore collectors such as xanthate, copper, lead, etc. , zinc, nickel and other sulfide minerals and pyrite, pyrrhotite and other gangue sulfide minerals flotation separation requires high alkalinity (pH ≥ 11), resulting in the low level of comprehensive utilization of sulfide ores

Method used

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  • Use of diester isosulfocyanate in sulphide ore floation and preparation method thereof
  • Use of diester isosulfocyanate in sulphide ore floation and preparation method thereof
  • Use of diester isosulfocyanate in sulphide ore floation and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1 1, the preparation of 4-butylene bis(oxycarbonyl isothiocyanate)

[0041] 38.0 parts NH 4 SCN was dissolved in 70 parts of water, and the mixture was added dropwise to 43.2 parts of butylene bischloroformate under stirring, and 0.24 parts of bis(4-N, N-dimethylaminophenyl) methane was added to control the reaction temperature It is about 0°C to 6°C, and reacts for 3h under stirring. After the stirring was stopped, the mixture was left to stand for about 30 minutes at a temperature of about 2° C., and the mixture was separated into an aqueous phase and an organic phase. After separating and removing the water phase, the obtained orange-red organic phase is the desired 1,4-butylene bis(oxycarbonyl isothiocyanate). The product yield based on ethylene dichloroformate was 93.6%.

Embodiment 2

[0042] Example 2 The preparation of 2,2'-ethylene ether group bis(oxycarbonyl isothiocyanate)

[0043] Add 24.3 parts of NaSCN to 50 parts of dichloromethane, and at the same time add 2.0 parts of PEG-400, and add a solution consisting of 23.1 parts of diethylene glycol dichloroformate and 30 parts of dichloromethane dropwise to the above reaction solution under stirring , control the reaction temperature at about 5°C to 15°C, and react for 4 hours under stirring, and the obtained orange-red dichloromethane solution contains the target product 2,2'-ethylene ether bis(oxycarbonyl isothiocyanate). The yield based on diethylene glycol dichloroformate was 95.2%.

Embodiment 3

[0044] Example 3: Synthesis of O, O'-dibutyl-N, N'-butanediesteryl dithiocarbamate

[0045] Take 0.1 mol of 1,4-butylene bis(oxycarbonyl isothiocyanate) synthesized according to Example 1, add 0.3 mol of n-butanol to it under stirring, and react with stirring at 40° C. for 2 hours after the addition is complete. During the reaction process, the color of the reaction solution gradually turns orange-red to bright yellow, and the reaction solution containing O, O'-dibutyl-N, N'-butanediesteryl dithiocarbamate is obtained, which can be used as sulfide ore without purification. Flotation collectors. Based on 1,4-butylene bis(oxycarbonyl isothiocyanate), the yield of O,O'-dibutyl-N,N'-butanediesteryl dithiocarbamate was 97.5%.

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Abstract

The invention discloses a diester-based 2-thiocyanate ester derivate applied in sulphide flotation, and the preparation method thereof. Diester-based 2-thiourea (the formula I) or diester-based 2-ethionine ester (the formula II) is applied as a collector for high efficiently recycling valuable sulfide minerals from metal sulphide ores by floatation. The collector has wide pH range in oremagma, thereby having strong ability to collect copper sulphide minerals such as chalcopyrite, etc., lead sulfide minerals or zinc sulfide minerals activated by copper ions, nickel sulfide minerals as well as noble metal minerals such as gold, silver, etc., and having good selectivity to gangue sulphide minerals such as iron pyrites, pyrrhotite, etc.

Description

[technical field] [0001] The invention relates to a high-efficiency collector for sulfide ore flotation—a diester-based diisothiocyanate derivative, and a preparation method for the compound. [Background technique] [0002] Flotation is the most important method to recover metal sulfide minerals from basic metal sulfide ores. Its operation process is to crush and grind the ore mined in the mine to form a slurry of dissociated sulfide mineral monomers, and then adjust the pH value of the slurry by adding Collector and frother, flotation recovery of metal sulfide minerals. [0003] Based on the similar properties of copper, iron, lead, zinc and other sulfide minerals, conventional collectors such as xanthate are usually used in actual production, and lime is used as a pH value regulator in high alkali (containing OH - and Ca 2+ ) environment to realize flotation separation of sulfide minerals such as copper, lead or zinc and gangue sulfide mineral iron sulfide, resulting in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012C07C331/16B03D101/02
Inventor 钟宏刘广义王帅
Owner CENT SOUTH UNIV
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