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Branched chain sodium taurate surfactant, preparation method and applications thereof

A surfactant, sodium taurine technology, applied in the preparation of sulfonates, chemical instruments and methods, drilling compositions, etc., can solve problems such as limited ability to reduce oil-water interfacial tension, achieve stable performance, improve The effect of 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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  • Branched chain sodium taurate surfactant, preparation method and applications thereof
  • Branched chain sodium taurate surfactant, preparation method and applications thereof
  • Branched chain sodium taurate surfactant, preparation method and applications thereof

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preparation example Construction

[0041] Second aspect, the embodiment of the present invention provides a kind of preparation method of branched chain sodium taurate surfactant, comprises the following steps:

[0042] Add Guerbet acid and phosphorus trichloride to the first reaction vessel, react at 60-95°C for 2-6 hours, cool to room temperature (such as 20-26°C) after the reaction is complete, separate the acid chloride, put into the second reaction vessel, then, dropwise add the aqueous solution of N-methyl taurine sodium and the acid-binding agent in the second reaction vessel, after reacting for 7-10 hours, adjust the pH of the reaction system to 7-8.5 And carry out drying, obtain branched chain sodium taurate surfactant.

[0043] Wherein, the molar ratio of Guerbet acid to phosphorus trichloride is 2.5-3.5:1.

[0044] The chemical structure of Guerbet acid is as follows:

[0045]

[0046] Among them, R is an alkyl group, and the molecular formula is C h h 2h+1 , h is an integer of 8-30.

[0047]...

Embodiment 1

[0061] Present embodiment provides a kind of branched chain sodium taurine surfactant, wherein n=12, m=10, and its chemical structural formula is:

[0062]

[0063] The preparation method of branched chain sodium taurine surfactant in the present embodiment is as follows: in the first reaction vessel, add Guerbet tetraceric acid and phosphorus trichloride, wherein, Guerbert tetraceric acid and The molar ratio of phosphorus trichloride was 3:1, reacted at 90°C for 4 hours, cooled to room temperature after the reaction, and separated the upper liquid to obtain Guerbet tetraceric acid chloride. Then, put into three-necked flask with Guerbet tetraceric acid chloride, and dropwise therein mass concentration be the aqueous solution of 10% N-methyl sodium taurate and the NaOH acid-binding agent of 10% mass concentration, After reacting for 8 hours, the pH of the reaction system was adjusted to 8, and dried. The product obtained after drying was Guerbet tetradecanoic acid sodium ta...

Embodiment 2

[0069] Present embodiment provides a kind of branched chain sodium taurine surfactant, wherein n=10, m=8, and its chemical structural formula is:

[0070]

[0071] The preparation method of branched chain sodium taurine surfactant in the present embodiment is as follows: add Guerbet eicosanic acid and phosphorus trichloride in the first reaction vessel, wherein, Guerbet eicosanic acid and trichloro The molar ratio of phosphorus chloride was 2.8:1, and the reaction was carried out at 85° C. for 5 hours. After the reaction was completed, it was cooled to room temperature, and the upper liquid was separated to obtain Guerbet eicosyl chloride. Then, Guerbert eicosyl chloride is put into the there-necked flask, and dropwise thereinto the aqueous solution of 15% N-methyl sodium taurate and the NaOH acid-binding agent of 10% in mass concentration, the reaction After 9 hours, the pH of the reaction system was adjusted to 7.5, and dried. The product obtained after drying was Guerbet...

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Abstract

The present invention discloses a branched chain sodium taurate surfactant, a preparation method and applications thereof, and belongs to the field of oil displacement agents, wherein the chemical structure formula of the branched chain sodium taurate surfactant is defined in the specification, n and m are integers, m is n-2, and n is 8-30. According to the present invention, the branched chain sodium taurate surfactant provided by the embodiments has the chemical structure formula defined in the specification, has the branched chain so as to substantially reduce the oil-water interface tension to less than 0.01 mN / m, and has the stable performance, such that the crude oil recovery rate can be significantly increased by using the branched chain sodium taurate surfactant as the oil displacement agent during the oil extraction process.

Description

technical field [0001] The invention relates to the field of oil displacement agents, in particular to a branched-chain sodium taurate 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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IPC IPC(8): C07C309/15C07C303/32C09K8/584
Inventor 时昌新宋社民任红梅曾庆桥王洪涛赵良言柏洁
Owner PETROCHINA CO LTD
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