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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 industrialization; sodium vinyl sulfonate and N-methyl taurine The cost of sodium acid is higher; the sodium chloroethylsulfonate process has the disadvantages of polluting the environment and corroding equipment

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of sulfonate anion nonionic surfactant that is used for oil field flooding, the general structural formula of described sulfonate anion nonionic surfactant is:

[0023]

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

[0025] The preparation reaction formula of this tensio-active agent is as follows:

[0026]

[0027] The preparation method mainly includes the following steps: Step 1) Add nonionic surfactant a and acrylic acid b into the reactor at a molar ratio of 1:1.2, and add 20% of strong acidic ions relative to the mass of nonionic surfactant a The exchange resin is used as a catalyst to synthesize a nonionic surfactant c with a double bond in the end group; step 2) mix 1 mole of the aqueous solution of the nonionic surfactant c with a double bond in the end group obtained in step 1) with 1.1 mol of After ammonium sulfite was stirred at 30°C for 20 hours, the water was distilled off, and the crude product was extr...

Embodiment 2

[0029] A kind of sulfonate anion nonionic surfactant that is used for oil field flooding, the general structural formula of described sulfonate anion 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 this tensio-active agent is as follows:

[0033]

[0034] The preparation method mainly includes the following steps: Step 1) Add nonionic surfactant a and acrylic acid b into the reactor at a molar ratio of 1:1.5, and add 15% of strong acidic ions relative to the mass of nonionic surfactant a The exchange resin is used as a catalyst to synthesize a nonionic surfactant c with a double bond in the end group; step 2) mix 1 mole of the aqueous solution of the nonionic surfactant c with a double bond in the end group obtained in step 1) with 1.2 mol of After ammonium bisulfite was stirred at 25°C for 21 hours, the water was distilled off, and the crude product ...

Embodiment 3

[0036] A kind of sulfonate anion nonionic surfactant that is used for oil field flooding, the general structural formula of described sulfonate anion 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 this tensio-active agent is as follows:

[0040]

[0041] The preparation method mainly includes the following steps: step 1) adding nonionic surfactant a and acrylic acid b into the reactor at a molar ratio of 1:1.8, and adding 25% of strong acidic ions relative to the mass of nonionic surfactant a The exchange resin is used as a catalyst to synthesize a nonionic surfactant c with a double bond in the end group; step 2) mix 1 mole of the aqueous solution of the nonionic surfactant c with a double bond in the end group obtained in step 1) with 1.4 mol of After sodium sulfite was stirred at 60°C for 18 hours, the water was distilled off, and the crude product wa...

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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.

Description

technical field [0001] The invention relates to a surfactant and a preparation method thereof, in particular to a sulfonate anion nonionic surfactant used for oil field flooding and a preparation method thereof. Background technique [0002] The oil extraction process is divided into primary oil recovery, secondary oil recovery and tertiary oil recovery. Primary and secondary oil recovery are both physical methods of oil recovery, usually 30-40% of crude oil can be recovered, and tertiary oil recovery can further increase the oil recovery rate through enhanced oil recovery measures. Chemical flooding is the main method of tertiary oil recovery, and surfactant flooding plays an important role in chemical flooding. Whether surfactant is used as a main agent or as an auxiliary agent, it plays an inestimable role in greatly improving oil recovery. effect. [0003] Currently there are petroleum sulfonates, alkyl sulfonates, alkenyl sulfonates and lignin sulfonates as surfactant...

Claims

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Application Information

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IPC IPC(8): C09K8/584C07C309/17C08G65/00
CPCC09K8/584C07C309/17C08G65/00
Inventor 黄叶芳
Owner 黄叶芳
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