Fatty alcohol-polyoxyethylene ether propionate surfactant and preparation method thereof and application thereof to tertiary recovery

A technology of alcohol polyoxyethylene ether propionate and surfactant, which is applied in the field of fatty alcohol polyoxyethylene ether propionate surfactant, can solve the problems of limited research results and few types, and achieves simple synthesis conditions and biological Good degradation performance and high surface activity

Active Publication Date: 2012-09-19
大连戴维斯化学剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, although there have been reports on the research on alcohol ether carboxylate surfactants at home and abroad, there are very few types, and domestic research results in this area are even more limited, basically still in the research and experimental stage.

Method used

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  • Fatty alcohol-polyoxyethylene ether propionate surfactant and preparation method thereof and application thereof to tertiary recovery
  • Fatty alcohol-polyoxyethylene ether propionate surfactant and preparation method thereof and application thereof to tertiary recovery
  • Fatty alcohol-polyoxyethylene ether propionate surfactant and preparation method thereof and application thereof to tertiary recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Fatty alcohol polyoxyethylene ether and methyl acrylate (n (fatty alcohol polyoxyethylene ether): n (methyl acrylate) = 1: 2) react under the action of KOH, wherein, methyl acrylate is fed by dropping , the dropping temperature is about 60°C, and the dropping time is about 1h. After the dropping is completed, the temperature is raised to about 70°C, and the reaction is about 8h. After the reaction is completed, it is filtered, washed, recrystallized, and dried to obtain the intermediate Fatty alcohol polyoxyethylene ether methyl propionate, the product is brown yellow solid.

[0034] Add the intermediate in a dry three-necked flask, heat to about 60°C, add dropwise 20% sodium hydroxide solution, stir at a molar ratio of 1:1, heat, control the reflux temperature at about 80°C, and adjust the pH value to 8~ 9. After reacting for 2 hours, finish the reaction, filter, wash, and dry overnight at 100°C under vacuum (vacuum degree is about 2.5kPa) to obtain fatty alcohol polyo...

Embodiment 2

[0037] Fatty alcohol polyoxyethylene ether and methyl acrylate (n (fatty alcohol polyoxyethylene ether): n (methyl acrylate) = 1: 3) react under the action of KOH, wherein, methyl acrylate is fed in a dropwise manner , the dropping temperature is about 60°C, and the dropping time is about 1h. After the dropping is completed, the temperature is raised to about 80°C, and the reaction is about 13h. After the reaction is completed, it is filtered, washed, recrystallized, and dried to obtain the intermediate Fatty alcohol polyoxyethylene ether methyl propionate, the product is brown yellow solid.

[0038] Add the intermediate in a dry three-necked flask, heat to about 60°C, add dropwise 15% sodium hydroxide solution, stir at a molar ratio of 1:1, heat, control the reflux temperature at about 90°C, and adjust the pH value to 8~ 9. After reacting for 3 hours, finish the reaction, filter, wash, and dry overnight at 100° C. under vacuum (vacuum degree is about 2.5 kPa) to obtain fatty ...

Embodiment 3

[0041] Fatty alcohol polyoxyethylene ether and methyl acrylate (n (fatty alcohol polyoxyethylene ether): n (methyl acrylate) = 1: 4) react under the action of KOH, wherein, methyl acrylate is fed by dropwise , the dropping temperature is about 60°C, and the dropping time is about 1h. After the dropping is completed, the temperature is raised to about 80°C, and the reaction is about 22h. After the reaction is completed, it is filtered, washed, recrystallized, and dried to obtain the intermediate Fatty alcohol polyoxyethylene ether methyl propionate, the product is brown yellow solid.

[0042] Add the intermediate to a dry three-necked flask, heat it to about 60°C, add dropwise 20% sodium hydroxide solution, stir at a molar ratio of 1:1, heat, control the reflux temperature at about 90°C, and adjust the pH value to 8~ 9. After reacting for 4 hours, finish the reaction, filter, wash, and dry overnight at 100° C. under vacuum (vacuum degree is about 2.5 kPa) to obtain fatty alcoho...

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Abstract

The invention discloses a fatty alcohol-polyoxyethylene ether propionate surfactant and a preparation method thereof and an application thereof to tertiary recovery. In a specific scheme, a novel anionic surfactant is synthesized by performing addition and saponification reactions on alcohol ether, methyl acrylate and sodium hydroxide serving as major raw materials. The method has the advantages of simple process, no need of special equipment, low raw material cost, wide source, stable product performance, environment friendliness and economic efficiency. The fatty alcohol-polyoxyethylene ether propionate surfactant is completely different from the conventional nonionic and anionic surfactants for displacement of reservoir oil, and high surface activity, thermal stability, salt resistance, compatability and biodegradability are achieved by embedding an ethoxy group into an anionic surfactant long alkyl chain. After fatty alcohol-polyoxyethylene ether propionate is compounded with other surfactants, a very good synergistic effect is achieved, and ultralow interface tension can be formed on a water-crude oil interface. Moreover, the surfactant is a salt-resistant, temperature-resistant and alkali-free surfactant for displacement of reservoir oil.

Description

technical field [0001] The invention relates to a fatty alcohol polyoxyethylene ether propionate surfactant, a preparation method thereof and its application as an oil displacement agent and compounding agent in tertiary oil recovery. Background technique [0002] The biggest feature of nonionic-anionic surfactants is their strong resistance to salt. In addition, for formation water with different salt content, the hydrophilic-lipophilic balance of the surfactant can be adjusted by adjusting the size of the oxyethylene chain unit in the alkoxy surfactant molecule. Therefore, as oil displacement agents, nonionic-anionic surfactants show greater advantages than sulfonate surfactants and carboxylate surfactants. The surfactants selected in Canada’s David Lioym-inster and Wainwright Sparky composite flooding tests belong to this category; the carboxylate-type surfactants synthesized by Tomokazu Yoshimura’s research group in Japan have excellent ability to reduce oil-water inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C07C59/125C07C51/41
Inventor 许虎君宋春丽罗强章
Owner 大连戴维斯化学剂有限公司
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