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Polyoxyethylene-benzene sulfonate type composite dimeric surfactant and preparation method thereof

A technology of benzenesulfonate and gemini surface, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of lowering oil-water interfacial tension, weak oil displacement ability, difficult to resist salt and temperature, and achieve easy scale-up The production and reaction conditions are mild and the raw materials are easy to obtain

Active Publication Date: 2017-11-24
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of traditional composite surfactants such as reducing the interfacial tension of oil and water, difficulty in salt resistance and temperature resistance, and weak oil displacement ability in oil displacement, the purpose of the present invention is to provide a polyoxyethylene-benzenesulfonate composite gemini Surfactant and its preparation method

Method used

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  • Polyoxyethylene-benzene sulfonate type composite dimeric surfactant and preparation method thereof
  • Polyoxyethylene-benzene sulfonate type composite dimeric surfactant and preparation method thereof
  • Polyoxyethylene-benzene sulfonate type composite dimeric surfactant and preparation method thereof

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Embodiment 1

[0032] The present embodiment provides a polyoxyethylene-benzenesulfonate type composite gemini surfactant, and the structural formula of the polyoxyethylene-benzenesulfonate type composite gemini surfactant is as shown in formula (1):

[0033]

[0034] The present embodiment also provides the preparation method of above-mentioned polyoxyethylene-benzenesulfonate type composite gemini surfactant, and it comprises the following steps:

[0035](1) Synthesis steps of the intermediate bis-nonylphenol: weigh p-nonylphenol and formaldehyde in a molar ratio of 2:1, add p-nonylphenol to the flask and then add a certain amount of 0.5wt% bis-nonylphenol Hydrated oxalic acid, the dosage is 0.5wt% deionized water of the p-nonylphenol dosage and 0.1wt% sodium dodecylbenzenesulfonate of the p-nonylphenol dosage, adding solid formaldehyde in batches during heating up to 90°C Stir and mix evenly, then raise the temperature to 120°C, connect the water separator, and react for 4 hours. Afte...

Embodiment 2

[0041] The present embodiment provides a polyoxyethylene-benzenesulfonate type composite gemini surfactant, and the structural formula of the polyoxyethylene-benzenesulfonate type composite gemini surfactant is as shown in formula (2):

[0042]

[0043] The present embodiment also provides the preparation method of above-mentioned polyoxyethylene-benzenesulfonate type composite gemini surfactant, and it comprises the following steps:

[0044] (1) The synthesis steps of the intermediate diheptylphenol: weigh p-heptylphenol and formaldehyde according to the molar ratio of 2.5:1, add p-heptylphenol to the flask, and then add the amount of p-heptylphenol The dihydrate oxalic acid of 0.2wt% is the deionized water of 1.0wt% of p-heptylphenol and the consumption is the sodium dodecylbenzenesulfonate of 0.2wt% of p-heptylphenol consumption, is warming up to 90 ℃ process Add solid formaldehyde in batches, stir and mix evenly, then raise the temperature to 130°C, connect the water se...

Embodiment 3

[0050] The present embodiment provides a polyoxyethylene-benzenesulfonate type composite gemini surfactant, and the structural formula of the polyoxyethylene-benzenesulfonate type composite gemini surfactant is as shown in formula (3):

[0051]

[0052] The present embodiment also provides the preparation method of above-mentioned polyoxyethylene-benzenesulfonate type composite gemini surfactant, and it comprises the following steps:

[0053](1) The synthesis steps of the intermediate didodecylphenol: weigh p-dodecylphenol and formaldehyde according to the molar ratio of 3:1, add p-dodecylphenol to the flask and then add the dosage Oxalic acid dihydrate in an amount of 0.2 wt% to p-dodecylphenol, deionized water in an amount of 1.0 wt% to p-dodecylphenol and dodecane in an amount of 0.2 wt% to p-dodecylphenol Sodium phenyl sulfonate, add solid formaldehyde in batches during the process of raising the temperature to 90°C, stir and mix evenly, then raise the temperature to 11...

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Abstract

The invention provides a polyoxyethylene-benzene sulfonate type composite dimeric surfactant and a preparation method thereof. The structural formula of the polyoxyethylene-benzene sulfonate type composite dimeric surfactant is as shown in FORMULA I, wherein n is 6, 7, 8, 9, 10, 12 or 14; m is 4, 5, 6, 7, 8, 9, 10, 15 or 20. The preparation method of the polyoxyethylene-benzene sulfonate type composite dimeric surfactant provided by the invention has the advantages that raw materials are readily available, reaction conditions are mild, and the prepared polyoxyethylene-benzene sulfonate type composite dimeric surfactant is high in purity, high in yield and favorable for enlarged production, is extremely high in surface activity, has good physical and chemical properties such as salt resistance, temperature tolerance and chemical structure stability, and can be widely applied to the field of oil exploitation.

Description

technical field [0001] The invention belongs to the technical field of surfactants, and relates to a polyoxyethylene-benzenesulfonate type composite gemini surfactant and a preparation method thereof. Background technique [0002] Surfactants are an important factor in enhancing oil recovery in tertiary oil recovery technology, but with the development of tertiary oil recovery technology, some shortcomings of surfactants used in oil displacement have obviously hindered the further improvement of oil recovery, such as The efficiency of reducing interfacial tension is not enough, and the temperature resistance or salt resistance is poor. The use of a single surfactant often cannot have the properties of high temperature resistance and mineral salt resistance at the same time. For example, nonionic surfactants have good salt resistance but poor temperature resistance, while ionic surfactants are temperature resistant but not salt resistant. The combined use of various surfacta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C08G65/334
Inventor 刘治田周泽坤张旗王璇
Owner PETROCHINA CO LTD