Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof

A technology of fatty acid amidopropyl betaine and fatty acid, which is applied in the field of fatty acid amidopropyl betaine foaming agent and its preparation, and achieves the effect of simple process, excellent performance and good foam stabilizing performance

Active Publication Date: 2016-03-30
西安长庆化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing general foaming agents

Method used

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  • Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof
  • Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof
  • Fatty acid amide propyl betaine foam scrubbing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In a reactor with a reflux condenser, add 0.5 mol of lauric acid, 0.25 mol of coconut oleic acid, and 0.25 mol of oleic acid in a molar ratio of 2:1:1, add N,N-dimethyl-1, About 1.05mol of 3-propanediamine, 1.28g of potassium hydroxide as a catalyst, conduct condensation reaction at 160°C for 4h, test that the content of free fatty acid is less than or equal to 2%, after the reaction is completed, cool and place overnight to obtain the intermediate product long-chain alkyl tertiary amine ; Weigh 1.0mol of the long-chain alkyl tertiary amine prepared in the first step, add 1.05mol of sodium chloroacetate, and add it to solvent water to form a 35% solution. Nucleophilic substitution reaction occurs at 60°C for 6 hours, and the content of free amine is less than 0.5%, the fatty acid amidopropyl betaine is obtained after the reaction, which is the main agent of the foaming agent resistant to high salinity and condensate oil.

Embodiment 2

[0031] In a reactor with a reflux condenser, add 0.5 mol of lauric acid, 0.25 mol of coconut oleic acid, and 0.25 mol of oleic acid in a molar ratio of 2:1:1, add N,N-dimethyl-1, About 1.05mol of 3-propanediamine, 1.5g of potassium hydroxide as a catalyst, conduct condensation reaction at 140°C for 4 hours, test that the free fatty acid content is less than or equal to 2%, after the reaction is completed, cool and place overnight to obtain the intermediate product long-chain alkyl tertiary amine ; Weigh 1.0 mol of the long-chain alkyl tertiary amine prepared in the first step, add 1.05 mol of sodium chloroacetate, add it to water to form a 35% solution, nucleophilic substitution reaction occurs at 90°C for 3 hours, and the free amine content is tested to be less than 0.5% At the end of the reaction, fatty acid amidopropyl betaine is obtained, which is the main agent of the foaming agent resistant to high salinity and condensate oil.

Embodiment 3

[0033] In a reactor with a reflux condenser, add 0.5 mol of lauric acid, 0.25 mol of coconut oleic acid, and 0.25 mol of oleic acid in a molar ratio of 2:1:1, add N,N-dimethyl-1, About 1.10mol of 3-propanediamine, 1.7g of potassium hydroxide as a catalyst, conduct condensation reaction at 140°C for 3.5h, test that the free fatty acid content is less than or equal to 2%. Amine: Weigh 1.0 mol of the long-chain alkyl tertiary amine prepared in the first step, add 1.05 mol of sodium chloroacetate, add it to water to form a 35% solution, nucleophilic substitution reaction occurs at 70°C for 5 hours, and the free amine content is less than 0.5 %, the reaction is completed to obtain fatty acid amidopropyl betaine, which is the main agent of foaming agent resistant to high salinity and condensate oil.

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Abstract

The invention relates to a foaming agent developed for foam drainage of a gas well, in particular to a fatty acid amide propyl betaine foam scrubbing agent as well as a preparation method and an application thereof. The fatty acid amide propyl betaine foam scrubbing agent is adaptable to the highly-mineralized and high-oil-bearing extreme environment with the mineralization degree higher than 25*10<4> mg/L and the content of condensate oil higher than 30%. According to the technical scheme, lauric acid, coconut fatty acid, oleic acid (cis-9-octadecenoic acid) and other fatty acids are added to a reactor in a certain mole ratio and have a condensation reaction with N,N-dimethyl-1,3-propane diamine at the temperature of 140-160 DEG C for 3-4 h, and an intermediate product, namely, long-chain alkyl tertiary amine, is obtained; the intermediate product and sodium chloroacetate have a nucleophilic substitution reaction at the temperature of 60-90 DEG C for 3-6 h, the content of free amine is tested to be smaller than 0.5%, fatty acid amide propyl betaine is obtained after the reaction, and fatty acid amide propyl betaine is a main agent of the foam scrubbing agent for the gas well. The prepared foam scrubbing agent has good foaming and foam stabilizing performance, foams carry a large quantity of liquids, and the foam scrubbing agent has excellent foam flooding performance in various extreme environments and has wide prospect.

Description

【Technical field】 [0001] The invention belongs to the field of colloid and interface chemistry, and specifically relates to a fatty acid amidopropyl betaine foaming agent and its preparation method and application. 【Background technique】 [0002] As the development of the gas field gradually enters the mid-to-late stage, formation gas pools continue to decline and reservoir heterogeneity, the flow rate of natural gas decreases, hydrocarbon condensate oil or formation water stays at the bottom of the wellbore, resulting in poor liquid-carrying capacity of the wellbore leading to accumulation in the wellbore. Severe flooding caused natural gas production to decrease or even shut down due to flooding. Since the early 1970s, many gas fields in the world have applied foam drainage for gas recovery, especially in the two oilfields of Changqing and Shengli in my country. Foam drainage gas recovery technology is an auxiliary production for water-producing gas wells Technology, conve...

Claims

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Application Information

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IPC IPC(8): C07C231/12C07C233/36C09K8/584E21B43/22
CPCC07C231/12C09K8/584E21B43/16C07C233/36
Inventor 万华黄依理付钢旦田伟刘双全窦淼惠燕妮王婉胡鹏飞朱趁安叶智
Owner 西安长庆化工集团有限公司
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