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Thiourea compound and preparation thereof and application thereof to metal ore floatation

A compound, thiourea technology, applied in flotation, organic chemistry, solid separation, etc., can solve the problems of insufficient mineral surface action, inconvenient addition, poor dispersion, etc., to improve the comprehensive recovery rate of metals, flotation The effect of improved recovery rate and weak collection capacity

Active Publication Date: 2014-11-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing thiourea collectors generally have a high melting point, poor dispersion in the pulp, insufficient interaction with the mineral surface, and inconvenient addition, which limits their application in flotation

Method used

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  • Thiourea compound and preparation thereof and application thereof to metal ore floatation
  • Thiourea compound and preparation thereof and application thereof to metal ore floatation
  • Thiourea compound and preparation thereof and application thereof to metal ore floatation

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation of embodiment 1N-benzoyl-N'-butoxypropyl thiourea

[0030] Slowly add 131.2 parts of γ-butoxypropylamine to the dichloromethane solution containing 163.2 parts of N-benzoyl isothiocyanate at a reaction temperature of -5 to 20°C under stirring conditions, and stir for 30 minutes , and then warmed up to room temperature and reacted for 1 hour. The solvent dichloromethane was distilled off under reduced pressure to obtain 290.5 parts of N-benzoyl-N'-butoxypropylthiourea as a yellow oily product with a product purity of 91.5%.

Embodiment 2

[0031] The preparation of embodiment 2N-benzoyl-N'-butoxypropyl thiourea

[0032] Slowly add the acetone solution containing 131.2 parts of γ-butoxypropylamine to the acetone solution containing 163.2 parts of N-benzoyl isothiocyanate at a reaction temperature of 10-20°C under stirring conditions, and the addition is complete Then reflux and stir the reaction for 2 hours. The solvent acetone was distilled off under reduced pressure to obtain 260.4 parts of N-benzoyl-N'-butoxypropylthiourea as a yellow oily product with a product purity of 94.6%.

Embodiment 3

[0033] The preparation of embodiment 3N-benzoyl-N'-isopropoxypropyl thiourea

[0034] Slowly add 117.2 parts of γ-isopropoxypropylamine to the dichloromethane solution containing 163.2 parts of N-benzoyl isothiocyanate at a reaction temperature of -5 to 20°C under stirring conditions, and stir to react 30min, then warmed up to room temperature and reacted for 1.5 hours. The solvent dichloromethane was distilled off under reduced pressure to obtain 270.2 parts of N-benzoyl-N'-isopropoxypropylthiourea as a yellow oily product with a product purity of 93.2%.

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Abstract

The invention discloses a thiourea compound and preparation thereof and an application thereof to metal ore floatation. An N-benzoyl-N'-hydrocarbon propoxy thiourea compound shown as a formula (I) is taken as a floatation collecting agent of nonferrous metal ore and noble metal ore, wherein R1 represents H, alkyl with 1-8 carbon atoms or R3O; R3 represents alkyl with 1-8 carbon atoms; R2 represents alkyl, aryl or aralkyl with 1-16 carbon atoms, or R4OR5; R4 represents alkyl with 1-3 carbon atoms; R5 represents alkylidene, aryl or aryl alkylidene with 1-16 carbon atoms; and n is 1 or 2. Valuable metal ore is recovered efficiently from nonferrous metal ore and noble metal ore by taking the compound shown as the formula (I) as a floatation collector. A floatation collector molecule in the N-benzoyl-N'-hydrocarbon propoxy thiourea compound contains an ether group, the melting point of the collector can be lowered, and the dispersity of the collector in an aqueous solution is enhanced, so that the flotation, separation and extraction of nonferrous metal ore and noble metal ore are enhanced. The N-benzoyl-N'-hydrocarbon propoxy thiourea compound has the characteristics of easy and convenient synthesis method, high metal recovery rate and the like.

Description

[technical field] [0001] The present invention relates to a novel compound—N-benzoyl-N'-alkoxypropyl thiourea compound, its preparation method, and its application in metal ore flotation. [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 and separation of nobl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C335/26B03D1/012B03D103/02
Inventor 刘广义钟宏曹占芳喻名强
Owner CENT SOUTH UNIV
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