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Anionic surfactant and preparing method thereof

A surfactant and anion technology, applied in the field of anionic surfactants and preparation, can solve the problems of poor temperature resistance and salt resistance, low interfacial activity, etc.

Active Publication Date: 2016-03-02
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 the problems of low interfacial activity, poor temperature resistance and salt resistance, and a new anionic surfactant is provided

Method used

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  • Anionic surfactant and preparing method thereof
  • Anionic surfactant and preparing method thereof
  • Anionic surfactant and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] C 16 h 33 O(CH 2 CH 2 O) 3 (CHCH 3 CH 2 O) 8 (CH 2 CH 2 O) 4 CH 2 COOH.NH 3

[0060] Add 374 grams (1 mole) of cetyl alcohol polyoxyethylene (3) ether and 5.6 grams of potassium hydroxide to a 2L pressure reactor equipped with a stirring device. Dehydration at lower temperature for 1 hour, and then replace with nitrogen for 3 to 4 times, adjust the reaction temperature of the system to 150°C and slowly introduce 469.8 grams (8.1 moles) of propylene oxide, control the pressure ≤ 0.60MPa, wait until the reaction of propylene oxide is completed Adjust the temperature to 140° C. and slowly feed 178.2 g (4.05 moles) of ethylene oxide to control the pressure to ≤0.40 MPa. After the reaction was completed, the temperature was lowered to 90°C, the low boilers were removed in vacuum, neutralized and dehydrated after cooling to obtain 1008.9 grams of cetyl alcohol polyoxyethylene (3) polyoxypropylene (8) polyoxyethylene (4) ether, the yield 99.5%.

[0061] Cetyl al...

Embodiment 2

[0065] C 16 h 33 O(CH 2 CH 2 O) 3 (CHCH 3 CH 2 O) 8 (CH 2 CH 2 O) 4 CH 2 COOH.N(CH 2 CH 2 Oh) 3

[0066] Mix with [Example 1] 494.7 grams of cetyl alcohol polyoxyethylene (3) polyoxypropylene (n=8) polyoxyethylene (4) ether acetic acid and 500 grams of water, adjust the pH of the system with 98% triethanolamine =8, to obtain the desired cetyl alcohol polyoxyethylene (3) polyoxypropylene (n=8) polyoxyethylene (4) ether acetate triethanolamine salt anionic surfactant S-2.

Embodiment 3

[0068]

[0069] Add 308 grams (1 mole) of nonylphenol polyoxyethylene (2) ether, 1.5 grams of potassium hydroxide and 4.6 grams of anhydrous potassium carbonate in the 2L pressure reactor that stirrer is equipped with, carry out with [embodiment 1] Replace with water and nitrogen, adjust the reaction temperature of the system to 160°C and slowly pass in 638 grams (11 moles) of propylene oxide, control the pressure ≤ 0.60MPa, after the reaction of propylene oxide is completed, cool down, and slowly pass in at 140°C 134.2 grams (3.05 moles) of ethylene oxide, control pressure ≤ 0.50MPa. After the reaction, the same post-treatment as in [Example 1] was performed to obtain 1006.7 grams of nonylphenol polyoxyethylene (2) polyoxypropylene (10) polyoxyethylene (3) ether, with a yield of 98.7%.

[0070] Nonylphenol polyoxyethylene (2) polyoxypropylene (10) polyoxyethylene (3) ether 510 grams (0.5 moles) and 40 grams (1 moles) of sodium hydroxide, 145.6 grams (1.25 moles) of sodium ...

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Abstract

The invention relates to an anionic surfactant. The anionic surfactant mainly solves the problems that a surfactant serving as an oil-displacing agent system component in the prior art is poor in adaptability to oil reservoir and poor in high temperature resistance and salt resistance. By the adoption of the anionic surfactant with a molecule general formula (see the formula in the description), R1 is an aliphatic group of C8-C30, or an aryl group substituted by a saturated and unsaturated alkyl group of a linear chain or a branched chain of C4-C20, R2 is an alkylidene group or a hydroxyl substituted alkylidene group of C1-C5, Y is COOM or SO3N, M and N are independently selected from hydrogen, alkali metal or at least one of radial groups shown as the formula NR3(R4)(R5)(R6), R3, R4, R5 and R6 are independently selected from one of H, (CH2)pOH or (CH2)qCH3, p is any integer from 2 to 4, and q is any integer from 0 to 5. According to the technical scheme, the problems are well solved, and the anionic surfactant can be applied to production of increasing the producible oil index of an oil field. R1O(CH2CH2O)m1(CH(CH3)CH2O)n(CH2CH2O)m2R2Y.

Description

technical field [0001] The invention relates to an anionic surfactant and a preparation method. Background technique [0002] Enhanced oil recovery technology, that is, the enhanced (EOR) and improved (IOR) oil recovery technology commonly referred to abroad, can be summarized as improving water flooding, chemical flooding, heavy oil thermal recovery, gas flooding, microbial oil recovery and physical oil recovery, etc. Six aspects. At present, the enhanced oil recovery technologies that have entered the large-scale application in mine fields are concentrated in three categories: thermal recovery, gas flooding and chemical flooding, of which the production of chemical flooding is 5.18×10 4 m 3 / d or more, accounting for about 14.7% of the world's total EOR production. Chemical flooding is an enhanced measure to enhance oil recovery by adding chemical agents to the aqueous solution to change the physical and chemical properties and rheological properties of the injected flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C08G65/338
Inventor 沈之芹李应成王辉辉吴国英李斌
Owner CHINA PETROLEUM & CHEM CORP
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