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, The effect of good selectivity and strong collection ability

Inactive Publication Date: 2009-01-07
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

[0038] Example 1 Preparation of 1,4-butylene bis(oxycarbonyl isothiocyanate)

[0039] 38.0 servings of NH 4 SCN was dissolved in 70 parts of water, the mixture was added dropwise to 43.2 parts of bis-chloroformate under stirring, and 0.24 parts of bis(4-N,N-dimethylaminophenyl)methane was added to control the reaction temperature. The temperature is about 0℃~6℃, and the reaction is carried out under stirring for 3h. After stopping stirring, the mixture was allowed to stand at a temperature of about 2°C for about 30 minutes, 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 bischloroformate was 93.6%.

Embodiment 2

[0040] Example 2 Preparation of 2,2'-ethylidene bis(oxycarbonyl isothiocyanate)

[0041] 24.3 parts of NaSCN were added to 50 parts of dichloromethane, and 2.0 parts of PEG-400 were added simultaneously, and a solution consisting of 23.1 parts of diethylene dichloroformate and 30 parts of dichloromethane was added dropwise to the above reaction solution under stirring. In the process, the reaction temperature was controlled to be about 5°C to 15°C, and the reaction was carried out under stirring for 4 hours. The obtained orange-red dichloromethane solution contained the target product 2,2'-ethylene ether bis(oxycarbonyl isothiocyanate). The yield based on diethylene bischloroformate was 95.2%.

Embodiment 3

[0042] Example 3: Synthesis of O,O'-dibutyl-N,N'-butylene dithiocarbamate

[0043] Take 0.1 mol of 1,4-butylene bis(oxycarbonyl isothiocyanate) synthesized according to Example 1, add 0.3 mol n-butanol to it under stirring, and stir and react at 40 ° C for 2 hours after adding, During the reaction, the color of the reaction solution gradually changed from orange-red to bright yellow to obtain a reaction solution containing O,O'-dibutyl-N,N'-butylene dithiocarbamate, which can be used as sulfide ore without purification Flotation collectors. The yield of O,O'-dibutyl-N,N'-butanediesteryl dithiocarbamate was 97.5% based on 1,4-butylene bis(oxycarbonyl isothiocyanate).

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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 one) or diester-based 2-ethionine ester (the formula two) is applied as a novel collector for high efficiently recycling valuable sulfide minerals from metal sulphide ores by floatation. The collector has wide pH range in ore magma, 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 novel high-efficiency collector for sulfide ore flotation, a diester-based diisothiocyanate derivative, and a preparation method of the compound. [Background technique] [0002] Flotation is the most important method for recovering metal sulfide minerals from basic metal sulfide ore. Collector and frother, flotation recovery of metal sulfide minerals. [0003] Based on the similar properties of sulfide minerals such as copper, iron, lead, and zinc, conventional collectors such as xanthate are usually used in actual production, and lime is used as a pH adjuster in high alkali (containing OH). - and Ca 2+ ) The flotation separation of copper, lead or zinc and other sulfide minerals and gangue sulfide minerals iron sulfide in the environment, resulting in low recovery rates of copper, lead or zinc and other sulfide minerals and precious metals such as gold and silver. High alkali conditions are also not conducive to the rec...

Claims

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Application Information

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