Synthetic method of ether amine flotation agent

Abstract

The invention discloses a synthetic method of an ether amine flotation agent. The synthetic method is characterized by comprising the following steps: (1) at ordinary temperature and normal pressure, placing chlorinated alkyl amine hydrochloride and an acid-binding agent in a solvent to sufficiently react and separate out white acicular crystals, adding a drying agent, stirring, filtering and collecting the filtrate; (2) adding a hydride of alkali metals into the filtrate, increasing the temperature till the system is slightly boiled for sufficient reaction; (3) after finish of the reaction, filtering to remove the solvent in the filtrate; (4) adjusting the pH of the filtrate from which the solvent is removed, extracting, separating out an extraction agent layer, and drying to ensure constant weight; (5) adjusting the pH of the dried extraction agent layer, extracting, separating out the water layer, and drying to obtain ether amine hydrochloride; (6) using an inorganic base solution to adjust the pH of ether amine hydrochloride, extracting, separating out an organic layer and removing the solvent in the organic layer to obtain the product. According to the synthetic method, normal-pressure reaction is carried out, the operation is safe, the process is simple and the cost is low.

Description

technical field [0001] The invention relates to a synthesis method of etheramine flotation agent. Background technique [0002] Ether amine is a kind of cationic surfactant. The flotation test has proved that ether amine has the same flotation properties and collection performance as fatty alkyl amines. The introduction of an ether group on the alkyl group of the amine can significantly reduce the melting point. Therefore, It can overcome the disadvantages that long-chain aliphatic amines are solid at normal temperature, are difficult to dissolve in water, cannot be fully dispersed in the flotation process, and cannot exert the maximum collection performance. [0003] Etheramine has the advantages of fast flotation speed, good selectivity, and easy handling of foam product transportation and dehydration. It is an effective and promising agent for improving hematite beneficiation indicators. At present, the synthesis method of ether amine flotation agent is mainly to condens...

AI Technical Summary

Problems solved by technology

Although the yield of this method is high, the process includes a hydrogenation reduction process, which requires high equipment operation, and side reactions are prone to occur during the hydrogenation reduction process to generate secondary amines, tertiary amines, etc., which increases the difficulty of product separation. Production higher cost

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