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Preparation method of allyl alkylxanthate collecting agent

A technology of alkyl xanthate and alkyl yellow, applied in the direction of organic chemistry, etc., can solve the problems of high water content in products, increased process cost, difficult to produce propylene xanthate products, etc.

Active Publication Date: 2020-03-06
SHENYANG RES INST OF NONFERROUS METALS
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AI Technical Summary

Problems solved by technology

However, the conditions of this synthesis reaction are relatively harsh, and it is difficult to obtain qualified propylene xanthate products in one step. The content of the semi-finished product is only between 85% and 90%, and the yield is about 90%. The semi-finished product needs to be purified twice. treatment, the content can reach the product quality standard: ≥90%, but this process makes the product yield drop by 1 to 2%, the cost of raw materials and labor and other processes increases accordingly, and the water content in the product is high, and even Unstable phenomena such as secondary separation
In addition, the products synthesized by this process and the production wastewater will emit a particularly unpleasant odor. This odor seriously affects the production and operation environment, and brings great difficulties to wastewater discharge and environmental protection treatment. The surface of the selected concentrate products will affect the sales and subsequent processing of the concentrate products

Method used

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  • Preparation method of allyl alkylxanthate collecting agent
  • Preparation method of allyl alkylxanthate collecting agent
  • Preparation method of allyl alkylxanthate collecting agent

Examples

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preparation example Construction

[0038] A kind of preparation method of alkyl xanthate propylene ester collector, comprises the following steps:

[0039] (1) Sodium alkyl xanthate is dissolved in water, and then synthetic auxiliary agent NF-1 is added to make solution A;

[0040] (2) Add halopropene and synthetic auxiliary agent NF-2 to solution A in sequence, and after the reaction is complete, separate the product phase to obtain alkyl xanthate propylene ester collectors.

[0041] Further, the synthetic auxiliary agent NF-1 is sulfuric acid, hydrochloric acid, nitric acid.

[0042] Further, the synthetic auxiliary agent NF-2 is sodium hydroxide, potassium hydroxide, barium hydroxide, ammonia water, sodium carbonate, sodium bicarbonate.

[0043] Further, the structure of the alkyl xanthate is:

[0044]

[0045] Further, the R is ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, hexyl, 2-ethylbutyl, heptyl, octyl, isooctyl, etc. ; The M is potassium, sodium and the like.

[0046] Further, t...

Embodiment 1

[0057] Add 50 grams of sodium isoamyl xanthate (content is 80.19%) in the reactor, add 100ml water, mix and stir for 20min, add dropwise sulfuric acid (content is 50%), adjust the pH value of the solution to 8, then add 17.5 grams Chloropropene (content: 98.31%), then add 2 grams of sodium hydroxide (content: 99%), use a temperature control device, keep the reaction temperature at 30-35°C, react for 2h, after the reaction, static separation, remove the water phase With a small amount of mesophase, 43.1 grams of propylene isopentyl xanthate was obtained, the purity of gas chromatography analysis reached 94.61%, and the product had no pungent smell.

Embodiment 2

[0059] Add 50 grams of sodium isoamyl xanthate (content is 80.19%) in the reactor, add 100ml water, mix and stir for 20min, then add 17.5 grams of allyl chloride (content is 98.31%), utilize temperature control device, keep reaction temperature React at 30-35°C for 2 hours. After the reaction, separate statically, remove the water phase and a small amount of intermediate phase, and obtain 41.4 grams of isopentyl xanthate propylene product. The purity of the gas chromatography analysis reaches 89.09%, and the product has strong irritation. Sexual smell.

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Abstract

The invention discloses a preparation method of an allyl alkylxanthate collecting agent. Alkylxanthate and halopropene are subjected to liquid-liquid heterogeneous reaction, the two synthesis assistants NF-1 and NF-2 are added, and the synthesis temperature and time are controlled to generate allyl alkylxanthate. According to the allyl alkylxanthate collecting agent prepared according to the method provided by the invention, the product and production wastewater have no irritating peculiar smell, the whole production control process is more environmentally friendly, and the product purity andyield are high.

Description

technical field [0001] The invention relates to a preparation method of an alkyl xanthate propylene ester collector, which belongs to the technical field of mineral processing. Background technique [0002] Mineral dressing reagents, especially the development and application of new and high-efficiency mineral dressing reagents, are an important means and effective way of mineral processing technology progress. Therefore, it is an important and promising work to develop new and high-efficiency beneficiation agents suitable for ore properties to improve the technical and economic indicators of ore beneficiation. [0003] Alkyl xanthate propylene is a non-ionic ester beneficiation agent, which has great advantages in the comprehensive collection performance of non-ferrous metal sulfide ores, especially copper-molybdenum sulfide ores. The agent has the advantages of good selectivity, high recovery rate, high grade concentrate, less dosage and convenient use. Alkyl xanthate pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C329/16
CPCC07C329/16
Inventor 王彦军张平军刘学勇刘瑶杨晓静徐耀强
Owner SHENYANG RES INST OF NONFERROUS METALS
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