Synthesis and purification method of O-isopropyl-N, N '-di-n-propyl thiocarbamate

Abstract

The invention relates to a synthesis method of O-isopropyl-N, N'-di-n-propyl thiocarbamate, which comprises the following steps: step 1, taking sodium chloroacetate as a raw material, adding sodium isopropyl xanthate, carrying out a reduction reaction, and generating an intermediate sodium isopropyl xanthate acetate; and 2, adding di-n-propylamine into the reactant in the step 1, and carrying out ammonolysis reaction on the di-n-propylamine and the intermediate sodium isopropyl xanthate acetate generated by the reaction in the step 1, so as to synthesize the target product O-isopropyl-N, N'-di-n-propyl thiocarbamate by using a chloroacetic acid esterification method. Meanwhile, the synthetic product is acidified and purified by adopting an acid solution, so that a product with higher purity is obtained. The invention provides a method for synthesizing and purifying a novel thionocarbamate collecting agent and also provides a novel collecting agent, the collecting capacity of the collecting agent is greatly improved on the basis of ensuring excellent selectivity, and the collecting agent has excellent flotation separation efficiency on chalcopyrite.

Description

technical field [0001] The invention relates to the field of collectors in the mineral processing field, in particular to a synthesis method and a purification method of O-isopropyl-N, N′-di-n-propylthiocarbamate in the collector. Background technique [0002] With the continuous mining of minerals, the number of refractory copper sulfide ores has gradually increased. In order to improve the separation efficiency of copper-sulfur flotation, it is an important research direction to develop high-efficiency copper-sulfur separation collectors. [0003] At present, the collectors in this field have the following problems: the most commonly used collectors are xanthate, generally ethyl xanthate, butyl xanthate, pentaxanthate, etc., which have strong collection ability, but poor selectivity . The currently used thiocarbamate collector Z-200 (O-isopropyl-N-ethylthiocarbamate) has better selectivity, but relatively weaker collection capacity. Therefore, on the basis of ensuring t...

AI Technical Summary

Problems solved by technology

[0003] At present, the collectors in this field have the following problems: the most commonly used collectors are xanthate, generally ethyl xanthate, butyl xanthate, pentaxanthate, etc., which have strong collection ability, but poor selectivity

Long carbon chain thiourethane molecules are difficult to synthesize, and the purity is not high

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