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Copper sulfide flotation collector as well as preparation method and application thereof

A collector and copper sulfide technology, applied in flotation, solid separation, etc., can solve the problems of poor universality and weak collection ability of compound reagents, and achieve improved solid affinity and beneficial metal recovery rate High and selective effect

Inactive Publication Date: 2015-04-01
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The research and development of the above compound reagents and new ester reagents have considered improving the selectivity of collectors for pyrite, but the universality of compound reagents is not strong, and ester collectors are not effective for chalcopyrite and other copper sulfide ores. The collection capacity of the object is slightly weaker than that of xanthate collectors, and the pH value of copper-sulfur separation is still above 11 in actual production. Collectors for technical problems and defects are very necessary

Method used

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  • Copper sulfide flotation collector as well as preparation method and application thereof
  • Copper sulfide flotation collector as well as preparation method and application thereof

Examples

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preparation example Construction

[0020] The preparation method of the copper sulfide flotation collector of the present invention is to generate a nucleophilic substitution reaction with an alkylamine, sodium hydroxide and carbon disulfide, and react for 1 to 2 hours at a temperature of 5 to 10°C to obtain sodium dithiocarbamate ; Sodium dithiocarbamate and alkyl chloroformate were reacted at 0~5°C for 2~4h to obtain the target collector alkoxycarbonyl alkyl dithiocarbamate.

[0021] The molar ratio of the alkylamine, sodium hydroxide and carbon disulfide is 1-1.05:1.05:4-6.

[0022] The molar ratio of the sodium dithiocarbamate to the alkyl chloroformate is 1:0.85-0.91.

[0023] Described alkylamine is dimethylamine, diethylamine or di-n-butylamine.

[0024] The sodium dithiocarbamate is sodium N,N-dimethyldithiocarbamate, sodium N,N-diethyldithiocarbamate or sodium N,N-dibutyldithiocarbamate.

[0025] The alkyl chloroformate is ethyl chloroformate, propyl chloroformate or butyl chloroformate.

[0026] Th...

Embodiment 1

[0032] Example 1 Preparation of Ethoxycarbonyl Dimethyl Dithiocarbamate (ECDMDTC)

[0033] Add sodium hydroxide and carbon disulfide into the reaction flask at a molar ratio of 1.05:4~6, mechanically stir at 5~10°C and slowly add 1~1.05 parts of dimethylamine dropwise, and keep the temperature at 5~10°C after the dropwise addition React for 1~2 hours to obtain N,N-dimethyldithiocarbamate sodium with a yield of 88~92% based on dimethylamine, then slowly add 0.85~0.91 parts of ethyl chloroformate dropwise at 0~5°C After the dropwise addition, react at 0~5°C for 2~4 hours, filter to remove white solid sodium chloride, and distill the filtrate under reduced pressure at 50~65°C for 2~3 hours to remove impurities, and obtain yellow oily liquid ECDMDTC. The rate is 73~82%.

Embodiment 2

[0034] Example 2 Preparation of Ethoxycarbonyl Diethyl Dithiocarbamate (ECDEDTC)

[0035] Add sodium hydroxide and carbon disulfide to the reaction flask at a molar ratio of 1.05:6~9, mechanically stir at 5~10°C and slowly add 1~1.05 parts of diethylamine dropwise, and keep the temperature at 5~10°C after the dropwise addition React for 1~2 hours to obtain N,N-diethyldithiocarbamate sodium with a yield of 86~91% based on diethylamine, then slowly add 0.84~0.90 parts of ethyl chloroformate dropwise at 0~5°C , after the dropwise addition, react at 0~5°C for 2~4 hours, filter to remove white solid sodium chloride, and distill the filtrate under reduced pressure at 50~65°C for 2~3 hours to remove impurities, and obtain yellow oily liquid ECDEDTC. The rate is 72~81%.

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Abstract

The invention discloses a copper sulfide ore flotation collector as well as a preparation method and application thereof. The collector is alkoxy carbonyl alkyl dithiocarbamate and has a structural formula as shown in the specification, wherein R1 is carbon chain 1-4 alkyl and R2 is carbon chain 2-4 alkyl. The preparation method comprises the following steps: performing nucleophilic substitution reaction on alkylamine, sodium hydroxide and carbon bisulfide to obtain sodium dithiocarbamate; reacting the sodium dithiocarbamate and alkyl chloroformate to obtain a target collector alkoxy carbonyl alkyl dithiocarbamate. The application refers to application of the copper sulfide ore flotation collector in performing flotation on copper sulfide ore and recycling valuable metal minerals in the copper sulfide ore. The collector is capable of realizing effective separation of the copper sulfide ore and pyrite under an ore pulp environment with the pH value of 6-10, reducing the lime consumption, and further effectively recycling useful metals such as gold, silver and molybdenum. Compared with the existing collector, the collector has the advantages of good selectivity and high useful metal recovery rate.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and in particular relates to a copper sulfide flotation collector and its preparation method and application. Background technique [0002] For the comprehensive utilization of copper sulfide ore resources, it is mainly to maximize the recovery of beneficial elements such as copper, sulfur, gold, silver, molybdenum and their carrier minerals from copper sulfide ore. Therefore, the development of high-efficiency copper sulfide ore flotation collectors is of great significance. [0003] Xanthate is widely used in the flotation process of copper sulfide ore due to its low price, but its selectivity in the separation process of copper and sulfur is poor, so copper and sulfur separation is often carried out under high alkali (pH>12) conditions to obtain qualified Copper concentrate and sulfur concentrate, but in this slurry environment, it is easy to cause some metal...

Claims

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Application Information

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IPC IPC(8): B03D1/016B03D1/02B03D101/02B03D103/02
Inventor 胡元简胜覃武林张旭东杨林张曙光梁溢强
Owner KUNMING METALLURGY INST
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