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Low-cost long-chain mixed glycine betaine, preparation method thereof and application of glycine betaine

A betaine and low-cost technology, applied in the field of low-cost long-chain mixed betaine and its preparation, can solve the problems of limiting the application of ultra-long-chain carboxybetaine, low reaction conversion rate, increasing reaction difficulty, etc., and achieves good synergistic growth. effect, improve oil-water adaptability, and low cost

Active Publication Date: 2018-09-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon chain length of conventional betaine surfactants is about 12, while the carbon chain length of betaine for oil displacement is about 18-26. Longer carbon chains significantly increase the difficulty of the reaction. The steric hindrance effect reaction conversion rate of the hydroxyl group on sodium acid is low, and it takes 12-24 hours at 80-100°C to make the conversion rate greater than 95%
The price of carboxybetaine is lower than that of sultaine, the hydrolysis is serious in the synthesis process of quaternization ammonium, the conversion rate is lower than that of sultaine, especially when the carbon chain is more than 18, the hydrolyzate content is more than 20%, which seriously limits the super Application of long-chain carboxybetaine (carbon chain greater than 18)

Method used

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  • Low-cost long-chain mixed glycine betaine, preparation method thereof and application of glycine betaine
  • Low-cost long-chain mixed glycine betaine, preparation method thereof and application of glycine betaine
  • Low-cost long-chain mixed glycine betaine, preparation method thereof and application of glycine betaine

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Effect test

Embodiment 1

[0030] This embodiment provides an octadecyl dimethyl mixed betaine and a preparation method thereof. The method of preparing the octadecyl dimethyl mixed betaine includes the following steps:

[0031] Step 1. Add 29.7g (0.1mol) of octadecyl dimethyl tertiary amine, 4.64g (0.04mol) of sodium chloroacetate, 10g of propylene glycol, and 10g of propylene glycol into a 250mL three-necked flask equipped with a thermometer and a reflux tube. Polyoxyethylene ether, 5g ethylene glycol monobutyl ether, then place the three-necked flask in an oil bath, control the reaction temperature at 110-115°C, and react for 1 hour to produce a mixed liquid containing carboxybetaine.

[0032] Step two, continue to heat up to 125-130°C, and add 13.76g (0.07mol) of sodium trichlorodihydroxypropanesulfonate to the mixed solution of step one, continue the reaction for 2h, detect the reaction by measuring the residual amine value, and determine after the reaction The conversion rate of amine conversion is 99....

Embodiment 2

[0040] This embodiment provides a meta-xylyl octadecyl dimethyl mixed betaine and a preparation method thereof. The method of preparing the octadecyl dimethyl mixed betaine includes the following steps:

[0041] Step 1: Add 40.1g (0.1mol) of m-xylyl octadecyl dimethyl tertiary amine into a 250mL three-necked flask equipped with a thermometer and a reflux tube, and add 5.8g (0.05mol) of sodium chloroacetate, 10g Propylene glycol, 20g propylene glycol polyoxyethylene ether, 10g ethylene glycol monobutyl ether, then place the three-necked flask in an oil bath, control the reaction temperature at 115-120°C, react for 1 hour, and produce a mixed liquid containing carboxybetaine.

[0042] Step two, continue to heat up to 120-125°C, and add 11.79g (0.06mol) of sodium trichlorodihydroxypropanesulfonate to the mixed solution of step one, continue the reaction for 1h, and then heat up to 130-135°C for reaction 2h. The reaction was detected by measuring the residual amine value. After the re...

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Abstract

The invention provides a low-cost long-chain mixed glycine betaine, a preparation method thereof and an application of the glycine betaine. The preparation method of the mixed glycine betaine includesthe steps: adding sodium chloroacetate and long-chain tertiary amine into an anhydrous mixed organic solvent to perform oil bath reaction to generate mixed liquid containing carboxyl glycine betaine;continuing to heat the mixed liquid, and adding sodium chloro hydroxypropyl sulfonate into the mixed liquid to perform reaction to obtain the long-chain mixed glycine betaine. The long-chain mixed glycine betaine is simple in preparation process, high in conversion rate and low in production cost and can embody good synergistic effects and excellent interface performances when serving as an oil-displacing agent applied to tertiary oil recovery, oil-water interface tension among the long-chain mixed glycine betaine and Daqing and Xinjiang oil field blocks can be ultra-low under non-alkali conditions, the recovery ratio can be increased by 25% or more by the aid of a non-alkali binary oil-displacing agent prepared by the long-chain mixed glycine betaine based on water drive, and the long-chain mixed glycine betaine has a wide application prospect in the field of tertiary recovery.

Description

Technical field [0001] The invention belongs to the technical field of surfactants, and specifically relates to a low-cost long-chain mixed betaine and a preparation method and application thereof. Background technique [0002] Betaine surfactant is an amphoteric surfactant. Its special structure determines its excellent ability and efficiency to reduce surface interfacial tension, and it has a wide range of application prospects in the field of tertiary oil recovery. Betaine surfactants, especially sulfobetaine, have broad application prospects in oilfield development, especially tertiary oil recovery, because of their excellent surface and interface properties as oil-displacing agents. The carbon chain length of conventional betaine surfactants is about 12, while the carbon chain length of betaine for flooding is about 18-26. The longer carbon chain significantly increases the difficulty of the reaction. In addition, the sulfobetaine is due to chlorohydroxypropyl sulfonate. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60E21B43/22
CPCC09K8/584C09K8/602E21B43/16
Inventor 周朝辉张群马德胜王红庄吴康云王强周新宇
Owner PETROCHINA CO LTD