Erucic acid-based alkyl quaternary ammonium surfactant and preparation method thereof
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A technology of erucic acid-based alkyl and surfactants, which is applied in the field of erucic acid-based alkyl quaternary ammonium salt surfactants and its preparation, can solve the problems of decreased sand-carrying ability, decreased apparent viscosity, and poor performance. Achieve strong sand-carrying capacity, easy flowback, and good temperature resistance
Pending Publication Date: 2017-11-24
张亚明 +5
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[0005] The invention provides an erucic acid-based alkyl quaternary ammonium salt surfactant and a preparation method thereof, aiming at solving the problem that the existing quaternary ammonium salt surfactant is used as a main agent for cleaning fracturing fluid and cleaning diverting acid fluid under high temperature and The apparent viscosity drops rapidly under high shear rate, which leads to the decrease of sand-carrying ability and poor performance
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Embodiment 1
[0023] A kind of erucic acid base alkyl quaternary ammonium salt surfactant, structural formula (I) is:
[0024]
Embodiment 2
[0026] A preparation method of erucic acid base alkyl quaternary ammonium salt surfactant, the steps are as follows:
[0027] a, the synthesis of erucamide:
[0028] Put N,N-dimethyl-1,3-propanediamine and erucic acid into the reaction kettle, the molar ratio of N,N-dimethyl-1,3-propanediamine and erucic acid is 1:1 (weight ratio about 720:230), add catalyst phosphorous acid, heat up to 100°C, 120°C or 130°C, react for 3h, 4h or 5h, then slowly heat up to 175°C, 180°C or 190°C, heating time is 1.9h , 2h or 2.1h, and finally react for 17h, 18h or 19h to obtain erucamide. Concrete reaction formula is as formula (II):
[0029]
[0030] B, the synthesis of erucic acid base alkyl quaternary ammonium salt surfactant:
[0031] Under normal pressure at 60-80°C, the erucamide obtained in step a is methylated with dimethyl sulfate, the molar ratio of erucamide and dimethyl sulfate is 1:1 (the weight ratio is about 920:250), and the mustard Acid-based alkyl quaternary ammonium sur...
Embodiment 3
[0034] On the basis of Example 2, in step b, sodium hydroxide is used to adjust the pH in the reactor, and the pH is adjusted to be >7.
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Abstract
The invention provides an erucic acid-based alkyl quaternary ammonium surfactant and a preparation method thereof. The invention aims to solve the problems of reducing sand-carrying capability and reducing performance caused by quick reducing colloidal viscosity under high temperature and high shearing rate of the present quaternary ammonium surfactant used as a main agent of a clean fracturing fluid. The structural formula (I) of the erucic acid-based alkyl quaternary ammonium surfactant is as shown in the specification. The preparation method for the erucic acid-based alkyl quaternary ammonium surfactant comprises the steps of compounding erucyl amide and compounding the erucic acid-based alkyl quaternary ammonium surfactant in turn. The invention can solve the problems of reducing sand-carrying capacity and reducing performance caused by quick reducing colloidal viscosity under high temperature and high shearing rate of the present quaternary ammonium surfactant used as the main agent of the clean fracturing fluid.
Description
technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to an erucic acid-based alkyl quaternary ammonium salt surfactant and a preparation method thereof. Background technique [0002] Acidizing fracturing fluid is the liquid used in acidizing fracturing measures by borrowing liquid conductivity (such as hydraulic power, etc.) in order to obtain high yield during the mining of fluid ore (gas, gas, oil, fresh water, brine, hot water, etc.). [0003] The cationic surfactant is used as the thickener for the preparation of fracturing fluid, which has the characteristics of strong sand-carrying ability, high flowback rate, and little damage to the reservoir. At the same time, the cationic surfactant dissolves quickly, the construction operation is convenient and quick, and the cost is low. Therefore, surfactant fracturing fluid has a huge demand in the development of oil and gas fields, and is widely used in the field of oil and ga...
Claims
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