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Surfactant composition containing polyether carboxylate and its preparation method and use

A technology of surfactant and polyether carboxylic acid, which is used in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor high temperature salt resistance, difficult purification and high preparation cost

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the surfactant used as the main component of the oil displacement agent system in the prior art has poor high temperature and salt resistance, high preparation cost and difficult purification. It provides a new polyether-containing carboxylic acid or salt surfactant composition

Method used

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  • Surfactant composition containing polyether carboxylate and its preparation method and use
  • Surfactant composition containing polyether carboxylate and its preparation method and use
  • Surfactant composition containing polyether carboxylate and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 242 grams (1 mole) of cetyl alcohol and 8.6 grams of potassium hydroxide to a 2L pressure reactor equipped with a stirring device, and when heated to 80-90°C, turn on the vacuum system and dehydrate under high vacuum for 1 hour , and then replace it with nitrogen for 3 to 4 times, adjust the reaction temperature of the system to 140°C and slowly feed 132.0 grams (3 moles) of ethylene oxide, and then slowly pass into 469.8 grams (8.1 moles) of propylene oxide at 150°C , control the pressure ≤ 0.60MPa, after the propylene oxide reaction is completed, adjust the temperature to 140°C and slowly introduce 178.2 grams (4.05 moles) of ethylene oxide, and control the pressure ≤ 0.40MPa. After the reaction was finished, lower the temperature to 90°C, remove the low boilers in vacuum, neutralize and dehydrate after cooling to obtain 998.8 grams of cetyl alcohol polyoxyethylene (3) polyoxypropylene (8) polyoxyethylene (4) ether, the yield 98.5%.

[0046] (2) in the reacti...

Embodiment 2

[0048] (1) Add 220 grams (1 mole) of nonylphenol, 1.5 grams of potassium hydroxide and 4.6 grams of anhydrous potassium carbonate in a 2L pressure reactor equipped with a stirring device, carry out water removal and nitrogen replacement with [Example 1] , adjust the reaction temperature of the system to 140°C and slowly feed 88.0 grams (2.0 moles) of ethylene oxide, then slowly feed 585.8 grams (10.1 moles) of propylene oxide at 150°C, control the pressure ≤ 0.60MPa, and wait for the ring to After the oxypropylene reaction, adjust the temperature to 140° C. and slowly introduce 134.2 grams (3.05 moles) of ethylene oxide to control the pressure to be ≤0.40 MPa. After the reaction was finished, the post-treatment was the same as in [Example 1] to obtain 991.4 grams of nonylphenol polyoxyethylene (2) polyoxypropylene (10) polyoxyethylene (3) ether, with a yield of 97.2%.

[0049](2) in the reaction flask of 2500 milliliters that is equipped with mechanical stirring, thermometer a...

Embodiment 3

[0051] R 1 O(CH 2 CH 2 O) 5 (CHCH 3 CH 2 O) 4 (CH 2 CH 2 O) 20 CH 2 COONa

[0052] Among them, R 1 The carbon chain distribution is: C 12 72.3%, C 14 27.7%.

[0053] (1) Add 195.0 grams (1 mole) of mixed twelve / fourteen (C) to the 2.5L pressure reactor equipped with stirring device 12～14 ) alcohol, 14.5 grams of anhydrous potassium carbonate, carry out water removal and nitrogen replacement with [Example 1], the system reaction temperature is adjusted to 140 ℃ and slowly feeds 222.2 grams (5.05 moles) of oxirane, then at 150 ℃ Slowly feed 234.9 grams (4.05 moles) of propylene oxide, and control the pressure to ≤0.50 MPa. After the reaction of propylene oxide is completed, lower the temperature, and slowly feed 924 grams (21 moles) of ethylene oxide at 130°C, and control the pressure ≤0.40MPa. After the reaction finishes, with [embodiment 1] aftertreatment, must mix 12 / 14 (C 12～14 ) alcohol polyoxyethylene (5) polyoxypropylene (4) polyoxyethylene (20) ether 151...

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Abstract

The present invention relates to a polyether carboxylic acid or salt surfactant-containing composition, a preparation method and uses thereof. A purpose of the present invention is mainly to solve the problems of poor high-temperature salt resistance, high preparation cost and difficult purification of the surfactant adopted as the oil displacement agent system component in the prior art. The technical scheme of the present invention comprises that the composition comprises, by molar, (1) 1 mole of a polyether carboxylic acid or salt surfactant, (2) 1-10 moles of an alcohol, and (3) 1-10 moles of a salt, wherein the structure formula of the polyether carboxylic acid or salt surfactant is represented by a formula I, X is O, R1 is C8-C30 aliphatic hydrocarbon or a benzene ring or naphthalene ring substituted by C4-C20 straight chain or branched chain saturated and unsaturated hydrocarbon, or R1X is abietate, and M is at least one selected from hydrogen, an alkali metal, and a group represented by a formula NR4(R5)(R6)(R7). With the technical scheme, the problems in the prior art are well solved. The polyether carboxylic acid or salt surfactant-containing composition can be used for the crude oil recovery rate improving production in the high temperature and high salt sandstone oil reservoir. The R1X(CH2CH2O)m1(CH3CHCH2O)n(CH2CH2O)m2R2COOM and the formula I are defined in the specification.

Description

technical field [0001] The invention relates to a surfactant composition containing polyether carboxylic acid or salt, its preparation method and application. Background technique [0002] Surfactant flooding technology is a method of enhancing oil recovery by adding surfactants into the injected water to improve the oil displacement efficiency by reducing the oil-water interfacial tension and improving the oil washing ability. Compared with polymer flooding technology, the key to the use of surfactants as oil flooding agents is the performance and cost of surfactants, especially the preparation cost directly restricts their application in oilfield enhanced oil recovery. The patents US3927716, US4018281, and US4216097 of Mobil Petroleum Company successively reported the results of using alkaline water flooding, surfactant or alkaline water flooding, and using zwitterionic surfactants for oil flooding. The zwitterionic surfactants used are of different chain lengths Carboxyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584C08G65/28
CPCC08G65/2609C08G65/2612C09K8/584
Inventor 沈之芹吴春芳翟晓东夏燕敏
Owner CHINA PETROLEUM & CHEM CORP