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Hydrophobic monomer for synthesizing temperature sensitive polymer oil-displacing agent and preparation method thereof

A temperature-sensitive polymer and hydrophobic monomer technology, applied in the direction of hydrocarbon production from oxygen-containing organic compounds, drilling compositions, chemical instruments and methods, etc., can solve the problem of loss of hydrophobic effect, removal of hydrophobic groups, water-soluble Improve the ability of temperature resistance and salt resistance, strengthen the hydrophobic effect, and reduce the cost

Inactive Publication Date: 2013-11-20
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above structural formula that the hydrophobic monomers (a), (b), (c), (d), and (e) all contain easily hydrolyzed amide bonds or ester bonds or carbonyl groups. It is easy to hydrolyze and break under the stimulation of stimuli to remove the hydrophobic group and lose the hydrophobic effect
And (f) and (g) contain benzene ring structure, have a certain rigidity, can improve the temperature resistance and salt resistance ability of the polymer, but among them (f)- p-tert-butyl styrene has a short alkyl chain and weak hydrophobicity , (g)-p-vinyl biphenyl contains two benzene rings, the water solubility will become poor

Method used

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  • Hydrophobic monomer for synthesizing temperature sensitive polymer oil-displacing agent and preparation method thereof
  • Hydrophobic monomer for synthesizing temperature sensitive polymer oil-displacing agent and preparation method thereof
  • Hydrophobic monomer for synthesizing temperature sensitive polymer oil-displacing agent and preparation method thereof

Examples

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Embodiment 1

[0031] (1) Synthesis of p-n-butylacetophenone

[0032] In a 500ml three-neck flask equipped with magnetic stirring, add 56.75g (0.44mol) of anhydrous aluminum trichloride to 200ml of dichloromethane at 0°C to dissolve for 30min, then slowly add 22.45g ( 0.22mol) acetic anhydride solution, continue to stir at 0°C for 15min, then slowly dropwise add 13.4g (0.1mol) n-butylbenzene solution dissolved in 25ml of dichloromethane for 30min, rise to room temperature and react for 5h. The mixture after the reaction is completed is poured onto 375ml of crushed ice, and the separated organic solution part is washed 2 times with 125ml of 10wt% hydrochloric acid solution, 125ml of saturated sodium carbonate solution, and 125ml of saturated sodium chloride solution. Methylene chloride is removed by rotary evaporation in vacuum after drying over magnesium sulfate water, and the liquid product p-n-butylacetophenone is obtained. figure 1 .

[0033] (2) Synthesis of 1-methyl-n-butylbenzyl alco...

Embodiment 2

[0038]First, acrylamide: N, N diethylacrylamide: p-n-butyl styrene = 79:20:1 monomer molar ratio, sequentially added to the three-necked flask, dissolved in deionized water to obtain a monomer solution, the monomer The total mass accounts for 30% of the total mass of the monomer solution, and then 1.5% of the total mass of the monomer is added with sodium dodecylsulfonate and 1% of the oxidation-reduction initiator system (the mass ratio of potassium persulfate: sodium sulfite is 1:1 ). Control the stirring speed at 100 rpm, the reaction temperature at 45°C, react for 10 hours, wash the product with acetone three times, and then dry it at 80°C to obtain the temperature-sensitive polymer flooding oil with n-butyl styrene agent. The synthesized temperature-sensitive polymer is configured as a 0.8% deionized aqueous solution. When the temperature exceeds 50°C (phase transition temperature), the viscosity rises sharply from 98.5mpa.s. to 256.9mpa.s., showing strong thermal thicke...

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Abstract

The invention discloses a hydrophobic monomer for synthesizing a temperature sensitive polymer oil-displacing agent and a preparation method thereof, which belong to the technical field of the design of oilfield chemical agents. In order to solve the problems of bad temperature resistance, salt resistance and anti-shear ability of a part of hydrolyzed polyacrylamide serving as an oil-displacing agent and solve the problems of complex synthesis method, dissolution difficulty and high cost of modified temperature-resistant and salt-resistant polymer oil-displacing agents, the invention provides a method for synthesizing a temperature sensitive polymer oil-displacing agent with a thermo-thickening function by copolymerizing poly N-alkyl acrylamide, acrylamide and a temperature-resistant, salt-resistant and hydrophobic monomer. According to the design, n-butylbenzene is used as a raw material, and the hydrophobic monomer p-n-butylbenzene ethylene is synthesized through three chemical reactions of Friedel-Crafts acylation, negative hydrogen transfer reduction and dehydration of alcohol to alkene. The reaction conditions are mild, the purification method is simple, the product is pure, and the requirements of temperature resistance and salt resistance of the hydrophobic monomer for forming the temperature sensitive polymer oil-displacing agent can be met.

Description

technical field [0001] The invention relates to a hydrophobic monomer used for synthesizing a temperature-sensitive polymer oil displacement agent and a preparation method thereof, belonging to the technical field of oilfield chemical agent design. Background technique [0002] Polymer oil displacement agent is a chemical agent widely used in tertiary oil recovery operations. At present, the commercialized industrial products mainly include partially hydrolyzed polyacrylamide (HPAM) and xanthan gum (XG). Among them, partially hydrolyzed polyacrylamide has been widely used in my country's petroleum production due to its low price and good application performance. application. However, xanthan gum is rarely used as a polymer oil displacing agent because of its poor injectability, poor heat resistance and antibacterial properties, and high cost. However, partially hydrolyzed polyacrylamide has the disadvantages of poor temperature resistance, salt resistance and shear resistan...

Claims

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Application Information

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IPC IPC(8): C07C15/46C07C1/24C08F220/56C08F220/54C08F212/12C09K8/588
Inventor 马超刘磊刘侨张熙赵林
Owner YANGTZE UNIVERSITY
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