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Sulphide ore floation collector and use method of diacyl bis-thiourea and preparation method thereof

A diacylbisthiourea, application method technology, applied in flotation, organic chemistry, solid separation and other directions, can solve the problems of low comprehensive utilization level and poor selectivity of sulfide ore, achieve good selectivity, simple preparation process, strong The effect of harvesting power

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

[0008] The purpose of this invention is to provide a kind of diacyl dithiourea compound as new sulfide ore flotation high-efficiency collector and its application method, to overcome the poor selectivity of traditional sulfide ore collectors such as xanthate, copper, lead , zinc, nickel and other sulfide minerals and gangue sulfide minerals such as pyrite and pyrrhotite flotation separation requires high alkalinity (pH ≥ 11), resulting in the low level of comprehensive utilization of sulfide ores

Method used

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  • Sulphide ore floation collector and use method of diacyl bis-thiourea and preparation method thereof
  • Sulphide ore floation collector and use method of diacyl bis-thiourea and preparation method thereof
  • Sulphide ore floation collector and use method of diacyl bis-thiourea and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Synthesis of N,N'-dipropyl-N",N"'-(terephthaloyl)bis(thiourea)

[0037] In a 250ml three-necked flask, add 2.03g terephthaloyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g potassium thiocyanate (0.025mol) and 40ml dichloromethane, and stir at 20℃ The reaction was carried out for 3.5 hours to obtain a yellow reaction liquid containing the terephthaloyl diisothiocyanate intermediate. Then, at 20°C, slowly drop 10ml of dichloromethane solution in which 1.68ml of n-propylamine (0.02mol) is dissolved into the above three-necked flask containing the terephthaloyl diisothiocyanate intermediate, and continue after dropping. The reaction was carried out at 20°C for 1 hour to obtain a reaction liquid containing N,N'-dipropyl-N",N"'-(terephthaloyl)bis(thiourea). The reaction solution was suction filtered to remove the by-product potassium chloride, and the dichloromethane was evaporated under reduced pressure to obtain N,N'-dipropyl-N",N"'-(terephthaloyl)bis(t...

Embodiment 2

[0038] Example 2: Synthesis of N,N'-Dibutyl-N",N"'-(terephthaloyl)bis(thiourea)

[0039] In a 250ml three-necked flask, add 2.03g terephthaloyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g potassium thiocyanate (0.025mol) and 40ml dichloromethane, stir at 15℃ The reaction was carried out for 3.5 hours to obtain a yellow reaction liquid containing the terephthaloyl diisothiocyanate intermediate. Then, at 15°C, slowly drop 10ml of methylene chloride solution in which 2.01ml of n-propylamine (0.02mol) is dissolved into the above three-necked flask containing terephthaloyl diisothiocyanate intermediate, and continue after dropping. The reaction was carried out at 15°C for 1 hour to obtain a reaction liquid containing N,N'-dibutyl-N",N"'-(terephthaloyl)bis(thiourea). The reaction solution was suction filtered to remove the by-product potassium chloride, and the dichloromethane was evaporated under reduced pressure to obtain N,N'-dibutyl-N",N"'-(terephthaloyl)bis(thiourea)...

Embodiment 3

[0040] Example 3: Synthesis of N,N'-Dipropyl-N",N"'-(1,4-succinyl)bis(thiourea)

[0041] In a 250ml three-necked flask, add 1.55g 1,4-succinyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g potassium thiocyanate (0.025mol) and 40ml dichloromethane at 20℃. The reaction was stirred for 3.5 hours to obtain a reaction liquid containing 1,4-succinyl diisothiocyanate intermediate. Then, at 20°C, slowly drop 10ml of dichloromethane solution in which 1.68ml of n-propylamine (0.02mol) is dissolved into the above three-necked flask containing 1,4-succinoyl diisothiocyanate intermediate, and add dropwise After continuing the reaction at 20°C for 1 hour, a reaction solution containing N,N'-dipropyl-N",N"'-(1,4-succinyl)bis(thiourea) was obtained. The reaction liquid was suction filtered to remove the by-product potassium chloride, and the dichloromethane was evaporated under reduced pressure to obtain N,N'-dipropyl-N",N"'-(1,4-succinyl)bis( As the initial product of thiourea, the ...

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Abstract

The invention discloses the application processes and the preparation methods of a sulphide ore flotation collector as well as a diacyl bis-thiourea. The invention relates to a novel collector used for high efficiently recycling valuable sulfide minerals from metal sulphide ores; the compositions of the sulphide ore flotation collector include diacyl bis-thiourea surface active agents; the diacyl bis-thiourea compound is shown in the constitutional formula (1) or (2). The collector has strong collecting ability to 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 has good selectivity to gangue sulphide minerals such as iron pyrites, pyrrhotite, etc., thereby realizing the high efficient flotation separation of the copper sulphide minerals and ferric sulfide minerals when the pH value of ore magma is below 11, reducing the used amount of lime, and improving the comprehensive recovery of copper sulphide ores.

Description

[Technical Field] [0001] The invention relates to a novel high-efficiency collector for flotation of sulfide ore—a diacyl dithiourea compound and an application method thereof, as well as a preparation method of the compound. [Background technique] [0002] Thiourea can be used commercially in dyes, photographic films, rubber, plastics and textiles. Certain thiourea derivatives can be used as insecticides, preservatives, rodenticides, etc. In chemical research, thiourea can be used as a reaction intermediate or ligand to synthesize the corresponding target product; through its complexation with metal ions, metal ions can be analyzed and separated. Some thiourea derivatives have biological activity and can be used as anti-cancer chemotherapeutics, anti-tuberculosis drugs, sleeping pills, anesthetics, insect repellents, anti-inflammatory drugs, antibacterial agents, etc. In hydrometallurgy, thiourea is an excellent complexing agent for precious metal ions, and is often used for the...

Claims

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Application Information

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IPC IPC(8): B03D1/012C07C335/26B03D101/02
Inventor 刘广义钟宏
Owner CENT SOUTH UNIV
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