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Glycine betaine-type ampholytic surfactant and preparation method thereof

A technology of surfactant and betaine, which is applied in the field of betaine-type amphoteric surfactant and its preparation, can solve the problems of low active substance content, increased production cost, difficulty in reducing acid value, etc., achieve mild performance, improve production The effect of low production rate and production cost

Active Publication Date: 2017-06-06
盘锦辽河油田裕隆瑞达石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly there are the following problems: 1) the acid value of the amidation reaction is difficult to reduce, so that the yield is on the low side and the production cost is higher; 2) most of them use mixed oil acids as raw materials for production, but this type of oil acids contains more impurities, and the properties Unstable, also have methyl oleate as raw material for production, but further increase the production cost; 3) The purification process is relatively simple, and the active substance content of the obtained product is low

Method used

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  • Glycine betaine-type ampholytic surfactant and preparation method thereof
  • Glycine betaine-type ampholytic surfactant and preparation method thereof
  • Glycine betaine-type ampholytic surfactant and preparation method thereof

Examples

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preparation example Construction

[0035] The preparation method of above-mentioned betaine type amphoteric surfactant comprises the following steps:

[0036] 1) Amidation reaction: Melt natural oil acid, add 3-dimethylaminopropylamine, mix well, add catalyst to carry out

[0037] For amidation reaction, add 4A molecular sieve after reacting for 5-7 hours, continue the reaction, and remove unreacted

[0038] 3-dimethylaminopropylamine and natural oleic acid to obtain alkyl amidopropyl dimethyl tertiary amine;

[0039] 2) Quaternization reaction: Add alkyl amidopropyl dimethyl tertiary amine and sodium chloroacetate to the reactor, add water until the sodium chloroacetate dissolves

[0040] solution is complete, then add isopropanol, adjust the pH value to 7-8, carry out quaternization reaction, and remove isopropanol after the reaction is completed.

[0041] propanol, water and unreacted sodium chloroacetate to obtain a betaine-type amphoteric surfactant.

[0042] Preferably, the structural formula of the na...

Embodiment 1

[0052] A kind of preparation method of betaine type amphoteric surfactant comprises the following steps:

[0053] 1) Amidation reaction: Add 25.6475g of palmitic acid into a three-necked flask equipped with a reflux condenser, raise the temperature to 80°C to slowly melt the palmitic acid, and then add 10.728g of 3-dimethylaminopropylamine dropwise while stirring (The molar ratio of palmitic acid to 3-dimethylaminopropylamine is 1:1.05), after 30 minutes of dripping, 0.177g of KOH was added as a catalyst, and the temperature was raised to 160°C for amidation reaction. After 6 hours of reaction, 10g of 4A was added Molecular sieves, continue to react for 5h, after the completion of the reaction, first remove unreacted 3-dimethylaminopropylamine and by-product water in the crude product by distillation under reduced pressure, and then use 1% Na 2 CO 3 The solution was washed to remove unreacted palmitic acid to obtain palmitoamidopropyl dimethyl tertiary amine with a yield of 9...

Embodiment 2

[0060] A kind of preparation method of betaine type amphoteric surfactant comprises the following steps:

[0061] 1) Amidation reaction: Add 22.84g of myristic acid into a three-necked flask equipped with a reflux condenser, raise the temperature to 80°C to slowly melt the myristic acid, and then add 10.73g of 3-dimethylamine dropwise while stirring Dimethylaminopropylamine (the molar ratio of myristic acid to 3-dimethylaminopropylamine is 1:1.05), drop it in 30 minutes, then add 0.17g of NaOH as a catalyst, raise the temperature to 160°C, and carry out amidation reaction. After 6 hours of reaction, add 10g of 4A molecular sieves, continue to react for 5h, after the completion of the reaction, first remove the unreacted 3-dimethylaminopropylamine and by-product water in the crude product by distillation under reduced pressure, and then use 1% Na 2 CO 3 The solution was washed to remove unreacted myristic acid to obtain myristamidopropyldimethyl tertiary amine with a yield of ...

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Abstract

The invention discloses a glycine betaine-type ampholytic surfactant and a preparation method thereof. The preparation method of the glycine betaine-type ampholytic surfactant comprises the following steps of (1) amidation reaction: carrying out amidation reaction on natural fatty acid and 3-dimethylaminopropylamine under the action of a catalyst, and timely removing water generated through reaction by using a 4A molecular sieve to obtain alkylamid-propyl dimethyl tertiary amine; and (2) quaterisation reaction: carrying out quaterisation reaction on alkylamid-propyl dimethyl tertiary amine and sodium chloroacetate in a solvent to obtain the glycine betaine-type ampholytic surfactant. The ampholytic surfactant group contains an amido bond, the performance of the molecule is changed, the glycine betaine-type ampholytic surfactant has better foam stability and mild performance, and the emulsifiability is obviously superior to that of the glycine betaine-type ampholytic surfactant. The preparation method is simple in process and low in production cost; the raw materials are green and natural; the water generated in the amidation reaction process is absorbed through the 4A molecular sieve; and the yield is improved.

Description

technical field [0001] The invention relates to a betaine type amphoteric surfactant and a preparation method thereof. Background technique [0002] Amphoteric surfactants refer to surfactants that have one or more positive and negative charge centers (or dipole centers) connected by bridge chains (hydrocarbon chains, fluorocarbon chains, etc.) in the same molecular structure. Good biodegradability, low toxicity, antistatic. Amphoteric surfactants first appeared in the 1930s, and were gradually developed and applied later. However, the research and development of amphoteric surfactants in my country started relatively late, and there is a big gap in variety and output compared with other developed countries. [0003] Domestic surfactants are mainly anionic surfactants and nonionic surfactants. These two types of surfactants will pollute the environment and are generally difficult to biodegrade. Alkyl amidopropyl betaine is a new type of high-efficiency amphoteric surfactan...

Claims

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Application Information

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IPC IPC(8): C07C233/36C07C231/12B01F17/28C09K23/28
CPCC07C231/02C07C231/12C07C233/36C09K23/00
Inventor 尚小琴王信锐刘鹏刘汝峰江慧华陈浩亮
Owner 盘锦辽河油田裕隆瑞达石油技术有限公司
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