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Hydroxysulfobetaine surfactant and preparation method and application thereof

A technology of hydroxy sulfobeet and surfactant, which is applied in the field of oil displacement agent, can solve the problem of limited ability to reduce the interfacial tension of oil and water, and achieve the effect of stable performance and enhanced oil recovery

Inactive Publication Date: 2017-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The surfactants provided by the prior art are straight-chain type, and their ability to reduce the interfacial tension of oil and water is limited

Method used

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  • Hydroxysulfobetaine surfactant and preparation method and application thereof
  • Hydroxysulfobetaine surfactant and preparation method and application thereof
  • Hydroxysulfobetaine surfactant and preparation method and application thereof

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preparation example Construction

[0044] In a second aspect, embodiments of the present invention provide a method for preparing a hydroxysultaine surfactant having the above structure, comprising the following steps:

[0045]Step 101, add Guerbet acid and phosphorus trichloride into the first reaction vessel, stir and react at 60-95°C for 2-6 hours, separate the layers after cooling, and separate the Guerbet acid chloride. Add a basic catalyst to the second reaction vessel, then add N,N-dimethylethylenediamine or N,N-dimethyl-1,3-propylenediamine solution, and drop into Geer Burt acyl chloride reacts at normal temperature, after the reaction is completed, wash with water and separate to obtain Guerbet acyl dimethyl tertiary amine.

[0046] In addition, there is another way to obtain Guerbet acyl dimethyl tertiary amines, which is to directly add N,N-dimethylethylenediamine or N,N-dimethyl-1,3 - Propylenediamine liquid, and dropwise add Guerbet acid chloride therein, after the completion of the reaction, wash...

Embodiment 1

[0075] The present embodiment provides a kind of hydroxy sultaine surfactant, wherein n=8, m=6, x=3, and its chemical structural formula is:

[0076]

[0077] Above-mentioned hydroxy sultaine surfactant is Guerbert palmitic acid hydroxy sultaine surfactant, and its preparation process is:

[0078] Step 1), add Guerbet palmitic acid and phosphorus trichloride to the first reaction vessel, the molar ratio of phosphorus trichloride and Guerbet palmitic acid is 1:2.5, stir and react at 60°C After cooling for 4 hours, the supernatant liquid was separated, which was Guerbet acid chloride. Then, KOH with a mass fraction of 10% was added into the second reaction vessel as a catalyst, and the amount used was 2% of the amount of Guerbet acid chloride. Then, add N,N-dimethyl-1,3-propanediamine solution dropwise to the second reaction vessel at a rate of 1ml / s, react at 23°C, N,N-dimethyl-1, The molar ratio of 3-propylenediamine solution to Guerbet palmitic acid was 1:1. Then, Guerb...

Embodiment 2

[0085] The present embodiment provides a kind of hydroxy sultaine surfactant, wherein n=12, m=10, x=3, and its chemical structural formula is:

[0086]

[0087]Above-mentioned hydroxy sultaine surfactant is Guerbert behenic acid hydroxy sultaine surfactant, and its preparation process is:

[0088] Step 1), add Guerbet tetraceric acid and phosphorus trichloride in the first reaction container, the molar ratio of phosphorus trichloride and Guerbet tetraceric acid is 1:2.6, at 95 ℃ The reaction was stirred for 4 hours, and the upper layer liquid was separated after cooling, which was Guerbet acid chloride. Then, NaOH with a mass fraction of 12% was added into the second reaction vessel as a catalyst, and the amount used was 1% of the amount of acid chloride. Then, add N,N-dimethyl-1,3-propanediamine solution dropwise to the second reaction container at a rate of 10ml / s, react at 25°C, N,N-dimethyl-1, The molar ratio of 3-propanediamine solution to Guerbet tetraceric acid is ...

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Abstract

The invention discloses a hydroxysulfobetaine surfactant and a preparation method and an application thereof, which belong to the field of an oil displacement agent. A chemical structural formula of the hydroxysulfobetaine surfactant is shown as a specification, wherein, n is an integer between 8 and 30, m is n-2, and x is 2 or 3. The hydroxysulfobetaine surfactant can reduce the oil-water interfacial tension to lower than 0.01 mN / m, the performance of the hydroxysulfobetaine surfactant is stable, and the hydroxysulfobetaine surfactant can be used as an oil displacement agent during a petroleum exploitation process, and can obviously increase the recovery efficiency of the crude oil.

Description

technical field [0001] The invention relates to the field of oil displacement agents, in particular to a isomeric hydroxy sulfobetaine surfactant and a preparation method and application thereof. Background technique [0002] The oil extraction process is generally divided into three stages, namely primary oil recovery, secondary oil recovery and tertiary oil recovery. Among them, the primary oil recovery and the secondary oil recovery are respectively carried out through physical methods such as formation raw energy and water injection development, and usually 30-40% of crude oil can be recovered by mass fraction. The tertiary oil recovery refers to the process of using chemical additives, especially oil displacement agents, to recover the remaining crude oil in the oil reservoir after primary oil recovery and secondary oil recovery. Generally, 60-70% mass fraction can be recovered. of crude oil. Oil displacement agent is an additive used to enhance oil recovery, usually ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C309/14C09K8/584
CPCC07C231/02C07C233/36C07C303/32C07C309/14C09K8/584
Inventor 时昌新张玉珍张宏李玉英顾玉洁王宁柏洁
Owner PETROCHINA CO LTD
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