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Double electron type polymerizable surfactant monomer, and preparation method and applications thereof

A surfactant, electronic technology, applied in the field of oilfield chemistry, can solve the problems of poor sand suspension ability, low cost, low yield and purity, high cost of fracturing fluid, low cost, good viscoelasticity and temperature and salt resistance. , Solve the effect of high cost

Inactive Publication Date: 2019-06-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a two-electron type polymerizable surfactant monomer, which has the characteristics of environmental protection, low cost, high yield and purity, and the hydrophobic association polymer solution based on the monomer It has good viscoelasticity, temperature resistance and salt resistance, and the fracturing fluid prepared by using it can effectively solve the technical problems of high cost and poor sand suspension ability of traditional hydrophobic association polymer fracturing fluids

Method used

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  • Double electron type polymerizable surfactant monomer, and preparation method and applications thereof
  • Double electron type polymerizable surfactant monomer, and preparation method and applications thereof
  • Double electron type polymerizable surfactant monomer, and preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] First, 100 mmol of dodecyl dimethyl tertiary amine was dissolved in ethanol, then 120 mmol of 37% hydrochloric acid was added to the round bottom flask, and stirred at room temperature for 5 min to completely dissolve the hydrochloric acid into the solution. Then, 200 mmol of epichlorohydrin was added into the flask, and the temperature was raised to 55° C. for 6.0 hours of reaction. After the reaction is completed, the ethanol and the remaining epichlorohydrin are removed by rotary evaporation, and finally a light yellow viscous paste is obtained, which is placed in a dry bottle for later use, and is recorded as EPT-12. The nuclear magnetic spectrum is as follows: figure 1 shown.

Embodiment 2

[0032] First, 100 mmol of octadecyl dimethyl tertiary amine was dissolved in ethanol, then 140 mmol of 37% hydrochloric acid was added to the round bottom flask, and stirred at room temperature for 10 min to completely dissolve the hydrochloric acid into the solution. Next, 160 mmol of epichlorohydrin was added into the flask, and the temperature was raised to 60° C. for 4.0 hours of reaction. After the reaction was completed, the ethanol and the remaining epichlorohydrin were removed by rotary evaporation, and finally a light yellow viscous paste was obtained, which was placed in a dry bottle for later use, recorded as EPT-18, and the nuclear magnetic spectrum was as follows: figure 2 shown.

Embodiment 3

[0034] First, 100 mmol of EPT-12 and 120 mmol of N-dimethylaminopropyl methacrylamide were dissolved in ethanol, followed by a reaction at 55° C. for 10 h. After the reaction is finished, the solvent is removed by rotary evaporation, and a light yellow viscous liquid will be obtained, which is denoted as DMEPT-12, and the nuclear magnetic spectrum is as follows: image 3 shown.

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Abstract

The invention discloses a double electron type polymerizable surfactant monomer. A preparation method comprises following steps: 1, epoxy chloropropane and a long chain tertiary amine are subjected toring-opening reaction in a hydrochloric acid solution so as to obtain an intermediate EPT; 2, EPT and N-dimethyl aminopropyl methacrylamide are subjected to quaterisation so as to obtain a finial product. The double electron type polymerizable surfactant monomer, acrylamide, acrylic acid, and 2-acrylamido-2-methylpropane sulfonic acid are subjected to polymerization, drying, crushing, and sievingat room temperature so as to obtain a polymer thickening agent powder; the polymer thickening agent powder is prepared into a 0.3wt% solution which is taken as a fracturing fluid. The preparation method is friendly to the environment; cost is low; yield and purity are relatively high; the hydrophobic associated polymer solution based on the monomer possesses excellent viscoelasticity and temperature resistance and salt resistance, so that the fracturing liquid prepared from the monomer is capable of solving technical problems in the prior art that conventional hydrophobic associated polymer fracturing liquid cost is high, and sand suspension capacity is poor.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and relates to the preparation of a dual-electron polymerizable surfactant monomer and its application in oilfield fracturing fluid thickeners. Background technique [0002] Two-electron polymerizable surfactant monomer is a kind of organic compound with unsaturated groups, long hydrophobic chains and strong water-soluble groups. Due to the quaternary ammonium ions, hydroxyl groups and amide groups in its structure, it has excellent Water-soluble, and due to the existence of its diquaternary ammonium salt structure, it has the effect of fungicide and clay stabilizer. In addition, under the condition that its amount is very small (≤0.20wt%) in the total amount of monomers, the hydrophobic monomer obtained by copolymerizing it with acrylamide, acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid The associative polymer aqueous solution is easier to form hydrogen bonds, so that the polymer a...

Claims

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Application Information

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IPC IPC(8): C07C233/38C07C231/12C07C215/08C07C213/04C08F220/56C08F220/06C08F220/58C08F220/60C09K8/68C09K8/88
Inventor 毛金成张阳毛金桦杨小江林冲
Owner SOUTHWEST PETROLEUM UNIV
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