Fatty acid amide propyl dimethylamine refining method

Abstract

The invention relates to a fatty acid amide propyl dimethylamine refining method. The molecular structure of the fatty acid amide propyl dimethylamine is shown in the following specification, wherein n is 7-23. The fatty acid amide propyl dimethylamine refining method is characterized by comprising the steps of step 1, on the basis of the synthesis process of fatty oil or vegetable oil, or animal oil, or fatty acid methyl ester and dimethylamino-1-propylamine, in the process of adding materials, adding 0.01-0.05% (the weight of the fatty oil or vegetable oil, or animal oil, or fatty acid methyl ester) of a reducing catalyst such as one or several of sodium sulfite, sodium borohydride, sodium hypophosphite, making the mixture react under original process condition, step 2, before discharging products, dropwise adding 0.3-0.5 time of original theoretical amount of dimethylamino-1-propylamine, under the original process condition continuing reaction for 0.5-2 hours, step 3, under the reaction temperature, increasing the flow of inert gas such as nitrogen gas to blow and wash from a reactor bottom until no dimethylamino-1-propylamine can be tested in tail gas, complete the refining to acquire the high quality fatty acid amide propyl dimethylamine.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to a method for refining fatty amidopropyl dimethyl tertiary amine. Background technique [0002] Fatty amidopropyl dimethyl tertiary amine is a good flotation agent for quartz sand and the most effective asphalt emulsifier. It can also be used in paper waterproofing agent, corrosion inhibitor and petroleum product additive. Intermediates of amines, betaines, and quaternary ammonium salts. It can be used in the preparation of foaming agent, thickener, ore enrichment agent and preparation of quaternary ammonium salt. In the daily chemical industry, it is used as emollient, conditioner, lubricant, moisturizer, emulsifier, etc., and can be used in hair conditioner, skin care agent, hair products, shampoo, skin products, etc. It can also be used in plastic injection molding, synthetic fiber, printing ink, oil field drilling, mineral flotation and pesticide emulsification and other ind...

AI Technical Summary

Problems solved by technology

At present, the production of fatty amidopropyl dimethyl tertiary amine in my country is developing rapidly, but there is still a large gap compared with foreign countries. All these products currently have the following main problems: (1) deep color, such as yellow to dark yellow, Gardner ( 25% ethanol solution) greater than 3; (2) residual dimethylaminopropylamine exceeds the standard, such as greater than 300mg / Kg

[0004] In view of the above-mentioned present situation, the present invention considers the problems of the above-mentioned two aspects of existence, solves the problem of deep color and residual dimethylaminopropylamine exceeding the standard, and its goal is to invent a method for refining the quality of fatty amidopropyl dimethyl tertiary amine

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