Sodium chloride flotation agent and preparation method thereof

Abstract

The invention discloses a sodium chloride flotation agent having the structural formula shown in the formula 1. The sodium chloride flotation agent has hydrophilicity and lipophilicity at the same time, and has a good flotation effect for sodium chloride. The invention further discloses a preparation method of the sodium chloride flotation agent mentioned above. According to the preparation method, melamine and long-chain halogenated straight-chain paraffin are used as preparation raw materials, the long-chain halogenated straight-chain paraffin is used as an N-alkylating reagent and is higherin reaction activity compared with an alcohol N-alkylating reagent in the prior art, and greater advantages are achieved particularly when introduced long-carbon-chain alkyl groups and amines are subjected to alkylation reaction, wherein it is difficult to alkylate the amines. Solvent is hardly used in the preparation method, none of catalysts is used, the reaction time is short, temperature is low, long-carbon-chain N-alkylate products of the melamine are synthesized by only controlling reaction conditions, and the process is simple.

Description

technical field [0001] The invention belongs to the technical field of sodium chloride flotation, and specifically relates to a sodium chloride flotation agent and a preparation method thereof. Background technique [0002] Melamine is an important nitrogen-heterocyclic organic chemical raw material, which has the characteristics of low toxicity, heat resistance, flame retardancy, arc resistance, good insulation, and easy coloring; its derivative melamine formaldehyde resin is also widely used in wood-based panels and papermaking industries , as a flame retardant in fabric finishing agents, etc.; after connecting it with a long carbon chain alkyl group, it can be used as an additive to improve plasticizers, enhance the printability of heat-sensitive recording materials, and friction parts of various machinery, especially at high temperatures Lubricity under conditions, etc. Because the compound has a ring structure, its long carbon chain derivatives can be used as flotation...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many N-alkylating agents for amines, including alcohols, esters, and aldehydes or ketones; however, when using the above-mentioned N-alkylating agents for amines, there are also limitations

First, alcohols are weak alkylating agents, so when a multi-carbon alkyl group is introduced on the nitrogen atom, the yield will be very low. When carrying out N-alkylation with methanol and ethanol, it is necessary to obtain a high yield Strong acid catalysis methods are required, such as N,N-dimethylaniline synthesis, hydroalkylation method, solid acid catalysis method, gas-solid phase contact catalytic alkylation method, which will result in large equipment investment and high production costs. ; Second, the alkyl esters of strong acids such as dialkyl sulfate, alkyl aryl sulfonate and trialkyl phosphate in esters are all active N-alkylating agents, but this type of alkylating agent The boiling point is very high, and N-alkylation can be carried out at normal pressure and low temperature, and is mainly used for the preparation of expensive, low-yield N-alkylated products, olefins, such as acrylonitrile, acrylic acid, etc.; third, when using When aldehydes or ketones are N-alkylated, it is easy to cause C-alkylation of aniline; in addition, the above methods are generally applicable to short carbon chain N-alkylation reactions of amines

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