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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, to achieve the effects of good selectivity, simple preparation process, and high-efficiency flotation separation

Inactive Publication Date: 2011-02-02
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 application method thereof, to overcome xanthate The selectivity of traditional sulfide ore collectors is poor. The flotation separation of sulfide minerals such as copper, lead, zinc, nickel and gangue sulfide minerals such as pyrite and pyrrhotite requires high alkalinity (pH ≥ 11) to cause sulfide The low level of ore comprehensive utilization

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: N, N'-dipropyl-N ", the synthesis of N " '-(terephthaloyl) bis (thiourea)

[0039] In a 250ml three-necked flask, add 2.03g of terephthaloyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g of potassium thiocyanate (0.025mol) and 40ml of dichloromethane, and stir at 20°C After reacting for 3.5 hours, a yellow reaction liquid containing a terephthaloyl diisothiocyanate intermediate was obtained. Then, at 20°C, slowly add 10 ml of dichloromethane solution dissolved with 1.68 mL of n-propylamine (0.02 mol) dropwise to the above-mentioned three-necked flask containing the intermediate of terephthaloyl diisothiocyanate, and continue React at 20°C for 1 hour to obtain a reaction solution containing N,N'-dipropyl-N",N"'-(terephthaloyl)bis(thiourea). The reaction solution was suction-filtered to remove by-product potassium chloride, dichloromethane was evaporated under reduced pressure to obtain N, N'-dipropyl-N", N"'-(terephthaloyl)bis(thiourea ) init...

Embodiment 2

[0040] Embodiment 2: N, N'-dibutyl-N ", the synthesis of N " '-(terephthaloyl) bis (thiourea)

[0041] In a 250ml three-necked flask, add 2.03g of terephthaloyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g of potassium thiocyanate (0.025mol) and 40ml of dichloromethane, and stir at 15°C After reacting for 3.5 hours, a yellow reaction liquid containing a terephthaloyl diisothiocyanate intermediate was obtained. Then, at 15°C, slowly add 10 ml of dichloromethane solution dissolved with 2.01 mL of n-propylamine (0.02 mol) dropwise to the above-mentioned three-necked flask containing the intermediate of terephthaloyl diisothiocyanate, and continue React at 15°C for 1 hour to obtain a reaction solution containing N,N'-dibutyl-N",N"'-(terephthaloyl)bis(thiourea). The reaction solution was suction-filtered to remove by-product potassium chloride, dichloromethane was evaporated under reduced pressure to obtain N,N'-dibutyl-N",N"'-(terephthaloyl)bis(thiourea ) initial p...

Embodiment 3

[0042] Embodiment 3: N, N'-dipropyl-N ", the synthesis of N " '-(1,4-succinyl) bis(thiourea)

[0043] In a 250ml three-necked flask, add 1.55g 1,4-succinoyl chloride (0.01mol), 3 drops of PEG-400 (about 0.2g), 2.46g potassium thiocyanate (0.025mol) and 40ml dichloromethane, at 20°C The mixture was stirred and reacted for 3.5 hours to obtain a reaction solution containing 1,4-succinyl diisothiocyanate intermediate. Then at 20°C, slowly add 10ml of dichloromethane solution in which 1.68mL of n-propylamine (0.02mol) was dissolved into the above-mentioned three-necked flask containing 1,4-succinyl diisothiocyanate intermediate, dropwise The reaction was continued at 20°C for 1 hour to obtain a reaction liquid containing N,N'-dipropyl-N",N"'-(1,4-succinoyl)bis(thiourea). The reaction solution was suction filtered to remove the by-product potassium chloride, dichloromethane was evaporated under reduced pressure to obtain N, N'-dipropyl-N", N"'-(1,4-succinyl)bis( Thiourea) initial ...

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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 diacylbis-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 high-efficiency collector for sulfide ore flotation—a diacyl dithiourea compound, an application method thereof, and a preparation method of the compound. [Background technique] [0002] Thiourea is 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. Certain thiourea derivatives have biological activity and can be used as anticancer chemotherapy reagents, anti-tuberculosis drugs, sleeping pills, anesthetics, insect repellents, anti-inflammatory drugs, antibacterial agents, etc. In hydrometallurgy, thiourea is an excellent complexing agent for noble metal ions, and is often used in the leaching an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/012C07C335/26B03D101/02
Inventor 刘广义钟宏
Owner CENT SOUTH UNIV
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