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Thio-carbonyl amide collector and preparation method and application thereof

A technology of thiocarbonyl amide and carbonyl amide, applied in solid separation, flotation, etc., to achieve the effects of shortened reaction time, good selectivity, and wide pH value of pulp

Active Publication Date: 2018-07-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the independent use of thiocarbonylamide as a collector in sulfide ore flotation.

Method used

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  • Thio-carbonyl amide collector and preparation method and application thereof
  • Thio-carbonyl amide collector and preparation method and application thereof
  • Thio-carbonyl amide collector and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Take 11.1g of phosphorus pentasulfide with a purity of 99% and 5.3g of sodium carbonate with a purity of 99.8%, add it to 100mL of ethyl acetate solution with a purity of 99.8%, and stir thoroughly at room temperature for 30 minutes; add 12.1g of benzene with a purity of 99% For formamide, the reaction bottle was placed in a microwave reactor, the power was adjusted to 300W, the temperature was set to 60°C, and the reaction time was set to 8 minutes. After the reaction was completed, thiobenzamide with a purity of 85.8% was obtained through concentration, extraction, concentration and filtration. The yield of thiobenzamide (based on benzamide) was 93.5%.

Embodiment 2

[0060] Take 22.2g of phosphorus pentasulfide with a purity of 99% and 11g of sodium carbonate with a purity of 99.8% and add it to 200mL of butyl acetate solution with a purity of 99.8%, and stir thoroughly at room temperature for 30 minutes; base acetamide, the reaction bottle was placed in a microwave reactor, the power was adjusted to 300W, the temperature was set to 60°C, and the reaction time was set to 12 minutes. After the reaction was finished, concentrated, extracted, concentrated, and filtered to obtain N-methylthioacetamide with a purity of 80.5%. The yield of N-methylthioacetamide (based on N-methylacetamide) was 94.6%.

Embodiment 3

[0062] Take 11.1g of phosphorus pentasulfide with a purity of 99% and 6.9g of potassium carbonate with a purity of 99% and add it to 100mL of ethyl acetate solution with a purity of 99.8%, stir thoroughly at room temperature for 30 minutes; add 8.7g of butanamide with a purity of 98% , heated in a water bath for 7 hours, and the heating temperature was set at 50°C. After the reaction was completed, it was concentrated, extracted, concentrated and filtered to obtain thiobutyramide with a purity of 84.5%. The yield of thiobutyramide (based on butanamide) was 87.9%.

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Abstract

The invention discloses a thio-carbonyl amide collector and a preparation method and application thereof. The collector is provided with an amino group and a thio-carbonyl group, and is prepared by reacting an amide with phosphorus pentasulfide. The thio-carbonyl amide collector is applied to flotation of sulfide ore, a strong collecting ability for copper sulfide ore, lead sulfide ore and gold, silver and other sulfide ore under neutral or alkaline conditions is achieved, and the degradation of thio-carbonyl amides in ore dressing tailings and the reversible regulation of the hydrophobicity of the sulfide ore are achieved. The thio-carbonyl amide collector has the advantages of good selectivity, wide pH value of ore pulp and the like, and the preparation method of the thio-carbonyl amidecollector has the advantages of simple process, high product yield and the like.

Description

technical field [0001] The present invention relates to a novel sulfide ore collector—thiocarbonyl amide compound and its preparation method and application, belonging to the field of mineral flotation. Background technique [0002] Thiocarbonyl amides are a very important class of organosulfur compounds. Due to the electronegativity of the sulfur atom and the distribution of extranuclear electrons, this type of compound is more active than the corresponding amides, and can undergo a series of conversion reactions. Thiocarbonyl Amide compounds, as a class of organic synthesis intermediates, have played an important role in drug synthesis and related fields. The application fields of thiocarbonyl amides are very broad, not only for the production of polymerization inhibitors, catalysts, stabilizers, pesticides, etc., but also for the production of pharmaceutical raw materials, vulcanizing agents, and crosslinking reagents. Aliphatic thiocarbonyl amides have a wide range of u...

Claims

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Application Information

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IPC IPC(8): B03D1/01B03D1/012B03D101/02B03D103/02
CPCB03D1/01B03D1/012B03D2201/02B03D2203/02
Inventor 钟宏贾云王帅曹占芳
Owner CENT SOUTH UNIV
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