Sulfonate anionic-nonionic surfactant for oilfield oil driving and preparation method thereof

A surfactant, non-ionic surface technology, applied in chemical instruments and methods, drilling compositions, organic chemistry, etc., can solve problems such as difficulty in industrialization, corrosion of equipment, environmental pollution, etc., to achieve less environmental pollution, reaction Gentle, high-conversion effect

Inactive Publication Date: 2017-12-01

黄叶芳

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Problems solved by technology

In the sulfoalkylation method, the yield is the highest when propane sultone is used as the sulfoalkylating agent, but in view of its high risk of carcinogenesis and explosion, it is difficult to realize indu...

Abstract

The invention discloses a sulfonate anion nonionic surfactant used for oil field displacement. The general structural formula is: wherein, the R group is a C12-C18 alkyl; Na+ or K+; the invention also discloses the preparation method of the surfactant, step 1) adding the non-ionic surfactant a and acrylic acid b into the reactor at a molar ratio of 1:1-3, using a strong acidic ion exchange resin as Catalyst, synthesize nonionic surfactant c with double bond in the end group; step 2) react 1 mole of c aqueous solution with 1-2 mole of sulfite or bisulfite, distill off water, and use ethanol for the crude product After extraction with a mixed solvent of water/water, the solvent is removed to obtain the target product. The invention adopts strongly acidic ion exchange resin as catalyst, and the catalyst is easy to separate; adopts sulfite or bisulfite as sulfonating agent, and has the advantages of good safety, mild reaction, low toxicity and little environmental pollution.

Application Domain

Organic chemistryDrilling composition

Technology Topic

SolventDouble bond +11

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Experimental program(6)

Example Embodiment

[0021] Example 1

[0022] A sulfonate anionic nonionic surfactant used for oil field flooding. The general structural formula of the sulfonate anionic nonionic surfactant is:

[0023]

[0024] Among them, the R group is C 12 Alkyl group, n=5; M is ammonium ion (NH 4 + ).

[0025] The preparation reaction formula of the surfactant is as follows:

[0026]

[0027] The preparation method mainly includes the following steps: Step 1) Add nonionic surfactant a and acrylic acid b at a molar ratio of 1:1.2 into the reactor, and add 20% strong acid ions relative to the mass of nonionic surfactant a Exchange resin is used as a catalyst to synthesize nonionic surfactant c with double bond in its end group; step 2) Take 1 mole of the aqueous solution of nonionic surfactant c with double bond in end group obtained in step 1) with 1.1 mol After ammonium sulfite was stirred at 30°C for 20 hours, the water was distilled off, and the crude product was extracted with a mixed solvent of ethanol/water to obtain the anionic surfactant solution. Remove the solvent to obtain the target sulfonate anion Surfactant d.

Example Embodiment

[0028] Example 2

[0029] A sulfonate anionic nonionic surfactant used for oil field flooding. The general structural formula of the sulfonate anionic nonionic surfactant is:

[0030]

[0031] Among them, the R group is C 13 Alkyl group, n=8; M is ammonium ion (NH 4 + ).

[0032] The preparation reaction formula of the surfactant is as follows:

[0033]

[0034] The preparation method mainly includes the following steps: Step 1) Add non-ionic surfactant a and acrylic acid b at a molar ratio of 1:1.5 into the reactor, and add 15% of the strong acid ion relative to the mass of non-ionic surfactant a Exchange resin is used as a catalyst to synthesize nonionic surfactant c with double bond in its end group; step 2) add 1 mole of the aqueous solution of nonionic surfactant c with double bond in end group obtained in step 1) to 1.2 mol After ammonium bisulfite was stirred at 25°C for 21 hours, the water was distilled off, and the crude product was extracted with a mixed solvent of ethanol/water to obtain the anionic surfactant solution. Remove the solvent to obtain the target product sulfonate anionic Ionic surfactant d.

Example Embodiment

[0035] Example 3

[0036] A sulfonate anionic nonionic surfactant used for oil field flooding. The general structural formula of the sulfonate anionic nonionic surfactant is:

[0037]

[0038] Among them, the R group is C 14 Alkyl group, n=10; M is sodium ion (Na + ).

[0039] The preparation reaction formula of the surfactant is as follows:

[0040]

[0041] The preparation method mainly includes the following steps: Step 1) Add non-ionic surfactant a and acrylic acid b at a molar ratio of 1:1.8 into the reactor, and add 25% of the strong acid ion relative to the mass of non-ionic surfactant a Exchange resin is used as a catalyst to synthesize nonionic surfactant c with double bond in the end group; step 2) add 1 mole of the aqueous solution of nonionic surfactant c with double bond in the end group obtained in step 1) to 1.4 mol After stirring the sodium sulfite at 60°C for 18 hours, the water is distilled off, and the crude product is extracted with a mixed solvent of ethanol/water to obtain anionic nonionic surfactant solution. Remove the solvent to obtain the target sulfonate anionic surface activity 剂d.

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Sulfonate anionic-nonionic surfactant for oilfield oil driving and preparation method thereof

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