Method for pipelined continuous production of fatty acid monoethanolamide

A technology of monoethanolamide and fatty acid, which is applied in the field of pipelined continuous production of fatty acid monoethanolamide, achieving the effects of high product purity, high reaction conversion rate, and small online reaction volume

Inactive Publication Date: 2019-07-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time of the reaction, there will be by-product amino ester, amide ester and salt formation

Method used

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  • Method for pipelined continuous production of fatty acid monoethanolamide
  • Method for pipelined continuous production of fatty acid monoethanolamide
  • Method for pipelined continuous production of fatty acid monoethanolamide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1, a kind of method of pipeline continuous production fatty acid monoethanolamide, adopts figure 1 The shown device, with methyl laurate and ethanolamine as raw material, carries out the following steps successively:

[0066] 1) Add 300mL of methanol into measuring cylinder 1, fully open the valves (needle valves 11-13, valve 14) in the system, and use a large flow rate of 10mL / min to fill the reaction coil 4 with methanol; Methanol recovery; then add reaction raw material--450mL of methanol solution of methyl laurate and ethanolamine in graduated cylinder 1.

[0067] The methanol solution of methyl laurate and ethanolamine is as follows: firstly methyl laurate and ethanolamine are mixed according to a molar ratio of 1:0.8, and then 1.2 times the volume of methanol is added to dissolve and configure a solution; that is, the volume of methyl laurate and ethanolamine Sum: volume of methanol = 1:1.2.

[0068] 2), charge the internal pressure of the system to 1...

Embodiment 2

[0078] Embodiment 2, a kind of method of pipeline continuous production fatty acid monoethanolamide:

[0079] In step (1), in methanol solution, the mol ratio of methyl laurate and ethanolamine is 1.0:1.0;

[0080] The rest are equal to Example 1.

[0081] Under different flow rate conditions, the reaction yields are shown in Table 2 below:

[0082] Table 2, embodiment 2 reaction result

[0083]

[0084]

[0085] The purity of fatty acid monoethanolamide is ≥98%.

Embodiment 3

[0086] Embodiment 3, a kind of method of pipeline continuous production fatty acid monoethanolamide,

[0087] In step (1), in the methanol solution, the molar ratio of methyl laurate and ethanolamine is 1:1.3; then add 1.2 times the volume of methanol to dissolve and configure a solution; that is, the sum of the volumes of methyl laurate and ethanolamine: methanol Volume = 1:1.2;

[0088] The rest are equal to Example 1.

[0089] Under different flow rate conditions, the reaction yields are shown in Table 3 below:

[0090] Table 3, embodiment 3 reaction result

[0091]

[0092] The purity of fatty acid monoethanolamide is ≥98%.

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PUM

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Abstract

The invention discloses a method of piping continuous production for fatty acid monoethanolamide; a piping reaction production apparatus used herein comprises a reaction coil, an outlet of the reaction coil is connected with an inlet of a high-pressure tank, and an outlet of the high-pressure tank is provided with a valve; the method comprises the steps of 1) filling the reaction coil with methanol; 2) boosting pressure in the reaction coil to 1.5+ / -0.1 MPa via inert gas, and adjusting inner temperature of the reaction coil to 140-200 DEG C; 3) using mixed methanol solution of fatty acid methyl ester and ethanolamine, introducing the methanol solution into the reaction coil at certain flow rate to carry out reaction; allowing the reaction fluid into the high-pressure tank, and when the inner pressure of the high-pressure tank is higher than 3 MPa, opening the valve to discharge the reaction fluid in the high-pressure tank; 4) removing unreacted materials and methanol from the reaction fluid discharged from the high-pressure tank so as to obtain fatty acid monoethanolamide.

Description

technical field [0001] The invention belongs to the field of organic synthesis, and relates to a method for pipelined continuous production of fatty acid monoethanolamide. Background technique [0002] Fatty acid monoethanolamide is a kind of oil-soluble nonionic surfactant with excellent performance. It has good stability and can play the role of solubilization, dispersion, emulsification, thickening and lubrication. And microbial degradability is good, it is one of the main components of sheet detergent. (Sun Lingxin, Ge Hong, Advances in Fine Petrochemicals, 2004: 5(5): 54-58) [0003] The following production methods are currently reported. [0004] Method 1: Zhang Xiaolei, Li Jinqi, Qing Ning, Sun Genxing, Fine Chemical Industry, 2000 17(4):191-193 reported: using fatty acid and ethanolamine as raw materials, adding a basic catalyst for reaction. The reaction generation equation is as follows: [0005] RCOOH+NH 2 C 2 h 4 OH→RCONHC 2 h 4 OH+H 2 O; [0006] Si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/02C07C233/18
CPCC07C231/02C07C233/18
Inventor 钱超欧阳博陈新志
Owner ZHEJIANG UNIV
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