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Acrylate copolymer with ultra-long chain, preparation method thereof, application and demulsifier using acrylate copolymer

A technology of acrylates and butyl acrylate, which is applied in the field of demulsifiers, can solve the problems of difficulty in demulsification and inability to meet the needs of crude oil dehydration, and achieve the goals of enhancing surface activity, improving demulsification and dehydration performance, and improving broad-spectrum performance Effect

Active Publication Date: 2021-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the wide application of chemical flooding methods, the stability of crude oil emulsion is gradually enhanced, and the difficulty of demulsification is becoming more and more difficult. The traditional polyoxyethylene polyoxypropylene block polyether demulsifier can no longer meet the needs of crude oil dehydration, so It is necessary to study new and efficient crude oil demulsifiers

Method used

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  • Acrylate copolymer with ultra-long chain, preparation method thereof, application and demulsifier using acrylate copolymer
  • Acrylate copolymer with ultra-long chain, preparation method thereof, application and demulsifier using acrylate copolymer
  • Acrylate copolymer with ultra-long chain, preparation method thereof, application and demulsifier using acrylate copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Steps:

[0063] Step 1, add 5 grams of butyl acrylate, 2 grams of hydroxyethyl acrylate, 2 grams of oleic acid and 20 grams of toluene into the reactor, and stir well until completely dissolved.

[0064] Step 2, replace the air in the reactor with nitrogen and continuously feed in nitrogen, heat to raise the temperature, and add part of 0.06 g of benzoyl peroxide to start the reaction under the condition of 80°C.

[0065] Step 3: After 2 hours of reaction, 1 gram of acrylic acid, 0.04 gram of benzoyl peroxide and 5 grams of N,N-dimethylformamide were well mixed and added to the reactor. The reaction was continued for 5 hours.

[0066] Step 4, lowering the temperature, removing most of the solvent and unreacted monomers from the reaction mixture with a rotary evaporator, precipitating with deionized water, washing with absolute ethanol repeatedly, and drying to obtain a yellow viscous liquid.

Embodiment 2

[0068] Steps:

[0069] Step 1, add 14 grams of butyl acrylate, 3 grams of hydroxyethyl acrylate, 2 grams of oleic acid and 15 grams of cyclohexanone into the reactor, and stir well until completely dissolved.

[0070] Step 2, replace the air in the reactor with nitrogen and continuously feed in nitrogen, heat to raise the temperature, and add 0.1 g of azobisisobutyronitrile to start the reaction under the condition of 68°C.

[0071] Step 3: After reacting for 4 hours, 1 gram of acrylic acid, 0.06 gram of azobisisobutyronitrile and 6 gram of cyclohexanone were well mixed and added into the reactor. Continue to react for no less than 8 hours.

[0072] Step 4, lowering the temperature, removing most of the solvent and unreacted monomers from the reaction mixture with a rotary evaporator, precipitating with deionized water, washing with acetone repeatedly, and drying to obtain a light yellow viscous liquid.

Embodiment 3

[0074] Steps:

[0075] Step 1, add 26 grams of butyl acrylate, 4.8 grams of hydroxyethyl acrylate, 6 grams of oleic acid and 50 grams of N,N-dimethylformamide into the reactor, stir well until completely dissolved.

[0076] Step 2, replace the air in the reactor with nitrogen and continuously feed nitrogen, heat to raise the temperature, and add 0.3 g of benzoyl peroxide-dimethylaniline (mass ratio 2:1) to start the reaction at 35°C.

[0077] Step 3, after 4 hours of reaction, fully mix 3.2 grams of acrylic acid, 0.1 grams of benzoyl peroxide-dimethylaniline (mass ratio 2:1) and 10 grams of N,N-dimethylformamide, and then add reactor. The reaction was continued for 12 hours.

[0078] In step 4, the temperature is lowered, and the solution product is directly discharged to obtain the polymer solution.

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Abstract

The invention provides an acrylate copolymer with an ultra-long chain, a preparation method thereof, a demulsifier using the acrylate copolymer and application of the acrylate copolymer. The copolymer contains a structural unit M as shown in a formula I, a structural unit N as shown in a formula II, a structural unit X as shown in a formula III and an optional structural unit Y as shown in a formula IV. According to the preparation method of the copolymer,in the presence of an initiator, butyl acrylate, hydroxyethyl acrylate, oleic acid and optional acrylic acid are subjected to solution free radical polymerization reaction to obtain the acrylate copolymer. The copolymer can be used for a demulsifier of a crude oil water-in-oil emulsion, and the demulsification and dehydration performance of the demulsifier on the crude oil water-in-oil emulsion is improved.

Description

technical field [0001] The invention relates to the field of demulsifiers, in particular to a super-long-chain acrylate copolymer, its preparation method, application and demulsifier. Background technique [0002] Ultra-long-chain surfactants refer to surfactants with more than 18 carbon atoms in the hydrophobic tail chain. This type of surfactant has excellent surface activity, low critical micelle concentration (cmc), and is easy to form novel aggregates. It has attracted widespread attention and has become a research hotspot in the field of surfactants. Natural oleic acid widely exists in vegetable oils. Oleic acid-based surfactants have the advantages of wide source of raw materials, environmental protection, and high biodegradability. It enriches the types of bio-based surfactants made from renewable resources and can be widely used in Surfactant system research and real life. [0003] Adding chemical agents to the crude oil emulsion to destroy the emulsion is called ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/20C08F220/64C08F220/06C10G33/04
CPCC08F220/1804C10G33/04C08F220/20C08F220/64C08F220/06
Inventor 侯丹丹徐伟张天宇许春梅张增丽
Owner CHINA PETROLEUM & CHEM CORP