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Preparing method for fatty acid amide propyl tertiary amine

A technology of fatty acid amidopropyl tertiary amine and fatty acid, which is applied in the field of preparation of fatty acid amidopropyl tertiary amine, can solve the problems of long synthesis time and low conversion rate of fatty acid, and achieve the effects of convenient control, improved efficiency, and reduced energy consumption

Active Publication Date: 2017-01-04
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a process, the conversion rate of fatty acids is significantly lower, and the synthesis time is too long

Method used

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  • Preparing method for fatty acid amide propyl tertiary amine
  • Preparing method for fatty acid amide propyl tertiary amine

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Experimental program
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Effect test

Embodiment 1

[0035] A kind of preparation method utilizing pipeline reactor to synthesize fatty acid amidopropyl tertiary amine, its preparation process (preparation process is as follows figure 1 shown) as follows:

[0036] Take 600.96g (3mol) of lauric acid, heat up and melt. Take 408.72g (3.6mol) N,N-dimethyl-1,3-propanediamine aqueous solution (purity 90%), 0.101g (100ppm) sodium hydroxide, dissolve sodium hydroxide in N,N-dimethyl Base-1,3-propanediamine. The above materials are mixed in a static mixer, and then enter the first pipeline reactor after mixing, the temperature of the pipeline is raised to 170°C, the initial pressure of the system is adjusted to 0.01MPa, and the reaction stays for 20min. Enter the first low boiler, remove the low boiler, get the first grade product and heated 61.31g (0.6mol) of pure N,N-dimethyl-1,3-propanediamine into the second through a static mixer In the pipeline reactor, the temperature was raised to 170° C., and stayed for 20 minutes, and then e...

Embodiment 2

[0038] A kind of preparation method utilizing pipeline reactor to synthesize fatty acid amidopropyl tertiary amine, its preparation process is as follows:

[0039]Take 600.96g (3mol) of lauric acid, heat up and melt. Take 395.50g (3.6mol) N,N-dimethyl-1,3-propanediamine aqueous solution (purity 93%), 0.093g (100ppm) sodium hydroxide, and dissolve sodium hydroxide in N,N-di Methyl-1,3-propanediamine. The above materials are mixed in a static mixer, and then enter the first pipeline reactor after mixing, the temperature of the pipeline is raised to 180°C, the initial pressure of the system is adjusted to 0 MPa, and the reaction stays for 30 minutes. Enter the first low boiler, remove the low boiler, get the first grade product and heated 61.31g (0.6mol) of pure N,N-dimethyl-1,3-propanediamine into the second through a static mixer The pipeline reactor was heated to 180° C., stayed for 30 minutes, and entered the second de-lowering kettle for the second de-lowering. After the d...

Embodiment 3

[0041] A kind of preparation method utilizing pipeline reactor to synthesize fatty acid amidopropyl tertiary amine, its preparation process is as follows:

[0042] Take 600.96g (3mol) of lauric acid, heat up and melt. 387.21g (3.6mol) N,N-dimethyl-1,3-propanediamine aqueous solution (purity 95%), 0.12g (120ppm) sodium hydroxide, and dissolve sodium hydroxide in N,N-dimethyl Base-1,3-propanediamine. The above materials are mixed in a static mixer, and then enter the first pipeline reactor after mixing, the temperature of the pipeline is raised to 190°C, the initial pressure of the system is adjusted to 0 MPa, and the reaction stays for 30 minutes. Enter the first low boiler, remove the low boiler, get the first grade product and heated 61.31g (0.6mol) of pure N,N-dimethyl-1,3-propanediamine into the second through a static mixer In the pipeline reactor, the temperature was raised to 190° C., and the temperature was kept for 30 minutes. Then, it entered the second de-lowering ...

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Abstract

The invention relates to a preparing method for fatty acid amide propyl tertiary amine. Preparation is carried out with pipeline reactors and devolatiligation equipment. The preparing method comprises the following steps that fatty acid, an N,N'-Dimethyl-1,3-propyldiamine aqueous solution and a catalyst are mixed and then enter the first pipeline reactor for a reaction; then a reaction product is put into a first devolatiligation kettle, and low-boiling-point substances are removed; then, the product obtained after devolatiligation is mixed with a small amount of pure N,N'-dimethyl-1,3-propyldiamine and then enters the second pipeline reactor for a reaction; finally, the product is put into a second devolatiligation kettle, low-boiling-point substances are removed, and fatty acid amide propyl tertiary amine is obtained. According to the preparing method, the pipeline reactors and a two-step method are adopted for synthesizing fatty acid amide, the synthesizing efficiency is greatly improved, the synthesizing time can be shortened to be 4 h or shorter, the conversion rate of fatty acid can reach 98% or above, and energy consumption is greatly reduced; besides, the preparing method is convenient to control and safe, and continuous mass production can be achieved.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a preparation method of fatty acid amidopropyl tertiary amine. Background technique [0002] In the prior art, the preparation method of fatty acid amidopropyl tertiary amine is usually prepared in a tank reactor, using excess pure N,N-dimethyl-1,3-propanediamine and fatty acid or fatty acid esters reaction, the reaction temperature is maintained at 155°C to 160°C, and the reaction time is as long as more than 10h, a large amount of water-containing N,N-dimethyl-1,3-propanediamine that has not been fully reacted will be produced, and its discharge will cause environmental pollution. The production efficiency is low and a large amount of synthesis equipment is required. As mentioned in the patent CN101260066, conventional methods are used to carry out amidation reaction of coconut oil methyl ester and diethanolamine, and the sample obtained by the process has low purit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C231/24C07C233/36
CPCC07C231/02C07C231/24C07C233/36
Inventor 汤仲标吴海龙雷秋芬李泽勇户献雷郭守彬张利萍
Owner GUANGZHOU TINCI MATERIALS TECH
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