A kind of functional monomer for synthesizing polymer oil displacement agent and preparation method thereof

A technology for synthesizing polymers and functional monomers, applied in drilling compositions, chemical instruments and methods, organic chemistry, etc., can solve problems such as increased difficulty in process control, failure to successfully polymerize, and insufficient polymerization activity, and achieve improved Effects of yield and purity, stable chemical structure, and high polymerization activity

Active Publication Date: 2022-04-26
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis yield of the monomer is 86.9%, and the purity is 91.5%, and this method is a very small amount of preparation in the laboratory. If it is used in actual production, due to the increased difficulty of process control in large-scale production, the yield may be further improved. reduce
At the same time, when the monomer is used for polymerization, there are problems of insufficient polymerization activity, poor polymerization effect, or failure to successfully polymerize due to insufficient purity.

Method used

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  • A kind of functional monomer for synthesizing polymer oil displacement agent and preparation method thereof
  • A kind of functional monomer for synthesizing polymer oil displacement agent and preparation method thereof
  • A kind of functional monomer for synthesizing polymer oil displacement agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1 (large production reaction of 10L)

[0053] In this example, R 1 For -H, the corresponding acid chloride is acryloyl chloride; R 2 for -CH 3 , and the corresponding piperazine derivative is N-methylpiperazine. The specific implementation steps of this embodiment are as follows:

[0054] (1) Add 5 L of dichloromethane and 1.1 kg of acryloyl chloride (12 mol) into a 10 L reactor in sequence. At 5° C., 1 kg of N-methylpiperazine (10 mol) was slowly added using a constant pressure dropping funnel.

[0055] (2) After the dropwise addition is completed, slowly warm up to room temperature, and continue to react for 10h; during the dropwise addition, yellow flocculent insolubles will gradually be produced, which is due to the formation of hydrochloride by the reaction by-product HCl and the functional monomer. due to low solubility in dichloromethane.

[0056] (3) After the reaction was completed, 1 L of deionized water was added, followed by saturated NaOH s...

Embodiment 2

[0064] In this example, R 1 for -CH 3 , the corresponding acid chloride is methacryloyl chloride; R 2 for -CH 3 , and the corresponding piperazine derivative is N-methylpiperazine. The specific implementation steps of this embodiment are as follows:

[0065] (1) Add 250 mL of dichloromethane and 62.72 g of methacryloyl chloride (0.6 mol) into a 500 mL three-necked flask in sequence. At 0° C., 50 g of N-methylpiperazine (0.5 mol) was added dropwise with a constant pressure dropping funnel.

[0066] (2) After the dropwise addition was completed, the temperature was slowly raised to room temperature, and the reaction was continued for 6 h. During the dropwise addition, yellow flocculent insolubles will gradually be produced, which is caused by the low solubility in dichloromethane after the reaction by-product HCl forms hydrochloride with the functional monomer.

[0067] (3) After the reaction was completed, 50 mL of deionized water was added, followed by saturated NaOH sol...

Embodiment 3

[0070] In this example, R 1 For -H, the corresponding acid chloride is acryloyl chloride; R 2 for -CH 2 CH 3 , and the corresponding piperazine derivative is N-ethylpiperazine. The specific implementation steps of this embodiment are as follows:

[0071] (1) 250 mL of dichloromethane and 54.3 g of acryloyl chloride (0.6 mol) were sequentially added into a 500 mL three-necked flask. At 0°C, 57.1 g of N-ethylpiperazine (0.5 mol) was added dropwise with a constant pressure dropping funnel.

[0072] (2) After the dropwise addition was completed, the temperature was slowly raised to room temperature, and the reaction was continued for 1 h. During the dropwise addition, yellow flocculent insolubles will gradually be produced, which is caused by the low solubility in dichloromethane after the reaction by-product HCl forms hydrochloride with the functional monomer.

[0073] (3) After the reaction was completed, 50 mL of deionized water was added, followed by saturated NaOH solut...

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Abstract

The invention relates to a functional monomer for synthesizing a polymer oil displacement agent and a preparation method thereof. It is characterized in that it has the following general structural formula: wherein: R 1 is ‑H or ‑CH 3 ; 2 for-CH 3 or-CH 2 CH 3 or-CH 2 CH 2 CH 3 or -CH(CH 3 ) 2 ; Its preparation method: 1) Mix a certain amount of methylene chloride and acid chloride evenly under stirring, control the temperature of the mixing system at 0-10° C., drop a certain amount of piperazine derivatives into the mixing system, and lower the temperature of the system Rise to 20-40°C to continue the reaction for 1-6 hours; 2) After the reaction, adjust the pH value of the reaction solution to 8-14, then add 2-5 times the volume of the reaction solution with dichloromethane for extraction, collect the organic phase, and dry , filter, and remove the organic solvent at 40-50°C to obtain the product and calculate the yield. The method of the present invention can improve the yield and purity of functional monomers through strict control and reasonable improvement of process parameters, and improve the success rate of polymerization as polymerized monomers, especially in the case of large-scale production, it can also maintain a relatively high yield , purity and monomer polymerization rate.

Description

technical field [0001] The invention relates to the technical field of tertiary oil recovery in oil field development, in particular to a functional monomer for synthesizing polymer oil displacement agents and a preparation method thereof. Background technique [0002] Polymer flooding technology can effectively improve the oil recovery of oil layers after water flooding. Daqing Oilfield relies on polymer flooding and alkali-surfactant-polymer ASP flooding to increase annual crude oil production by nearly 13 million tons, and Shengli Oilfield relies on polymer flooding and polymer-surfactant binary compound flooding to increase annual crude oil production by more than 1.6 million tons. [0003] Because partially hydrolyzed polyacrylamide (HPAM) has good water solubility, and its raw materials are readily available and low in cost, it has become the most widely used polymer for tertiary oil recovery. The main function of HPAM solution in tertiary oil recovery is to increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D295/185C09K8/588C08F220/56C08F220/60
CPCC07D295/185C08F220/56C09K8/588C08F220/60
Inventor 伍晓林韩培慧冯玉军孙刚陈国李勃潘峰刘宏生
Owner PETROCHINA CO LTD
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