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Sulfonated phenolic resin modified polyacrylamide and preparation method thereof

A technology of sulfonated phenolic resin and polyacrylamide, which is applied in the fields of petroleum exploration and polymer polymerization, can solve the problems of general temperature and salt resistance and unfavorable application of polyacrylamide, and achieve the improvement and reduction of salt resistance and high temperature resistance. Influence, effect of excellent solubility

Active Publication Date: 2021-08-17
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature and salt resistance of polyacrylamide prepared by this method is average, and the viscosity in 85°C salinity 3w salt water is only 14.2, which is not conducive to the application in field construction

Method used

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  • Sulfonated phenolic resin modified polyacrylamide and preparation method thereof
  • Sulfonated phenolic resin modified polyacrylamide and preparation method thereof
  • Sulfonated phenolic resin modified polyacrylamide and preparation method thereof

Examples

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preparation example Construction

[0040] like figure 1 As shown, the invention provides a kind of preparation method of the polyacrylamide of sulfonated phenolic resin modification, and this preparation method comprises the steps:

[0041] (1) Polycondensation reaction of phenolic compound, sulfonating agent and aldehyde compound to obtain sulfonated phenolic resin;

[0042] (2) Copolymerizing the sulfonated phenolic resin and p-hydroxyphenylacrylic acid to obtain a modified sulfonated phenolic resin;

[0043] (3) Add acrylamide, sodium acrylate, 2-acrylamido-2-methylpropanesulfonic acid, solubilizer, temperature-resistant and salt-resistant functional monomer, the modified sulfonated phenolic resin, and initiator into the reactor Copolymerize with a chain transfer agent to obtain the polyacrylamide modified by the sulfonated phenolic resin.

[0044] In the present invention, preferably, the molecular weight of the sulfonated phenolic resin obtained in the step (1) is 500-1000, and is an anionic water-solubl...

Embodiment 1

[0097] (1) Add 1 part of phenolic compound (phenol) to a three-neck flask equipped with a stirrer, reflux condenser and thermometer, and slowly add 1.2 parts of sulfonating agent (concentrated sulfuric acid with a mass fraction of 98%), at 100 °C Under the sulfonation reaction for 2h, the sulfonated phenol derivative is obtained; the sulfonation reaction is as follows:

[0098]

[0099] Then 2.2 parts of sulfonated phenol derivatives and 1 part of aldehyde compound (formaldehyde) were polycondensed at 100°C for 4 hours to obtain sulfonated phenolic resin; the polycondensation reaction is as follows:

[0100]

[0101] Wherein, n is 3-10;

[0102] (2) Add 0.5 parts of p-hydroxyphenyl acrylic acid dropwise to 1.5 parts of sulfonated phenolic resin obtained in step (1), and carry out a copolymerization reaction at 80°C for 1 hour to obtain a modified sulfonated phenolic resin after copolymerization; the copolymerization The response looks like this:

[0103]

[0104] Wh...

Embodiment 2

[0107] (1) Add 1 part of phenolic compound (2-methoxyphenol) to a three-necked flask equipped with a stirrer, reflux condenser and thermometer, and slowly add 0.8 parts of sulfonating agent (concentrated sulfuric acid with a mass fraction of 98% ), sulfonated at 80°C for 1.5h to obtain sulfonated phenol derivatives; then polycondensed 1.8 parts of sulfonated phenol derivatives and 1 part of aldehyde compound (formaldehyde) at 85°C for 3 hours to obtain sulfonated phenolic resin ;

[0108] (2) Add 0.5 parts of p-hydroxyphenyl acrylic acid dropwise to 1.5 parts of the sulfonated phenolic resin obtained in step (1), and conduct a copolymerization reaction at 100° C. for 1.5 hours to obtain a modified sulfonated phenolic resin after copolymerization;

[0109] (3) Mix 50 parts of acrylamide, 120 parts of sodium acrylate, 60 parts of 2-acrylamido-2-methylpropanesulfonic acid, 725 parts of deionized water, 15 parts of temperature-resistant and salt-resistant functional monomer (N-vin...

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Abstract

The invention provides sulfonated phenolic resin modified polyacrylamide and a preparation method thereof, which are applied to the technical field of oil exploitation, and the method comprises the following steps: carrying out condensation polymerization on a phenolic compound, a sulfonating agent and an aldehyde compound to obtain sulfonated phenolic resin; carrying out copolymerization reaction on the sulfonated phenolic resin and p-hydroxycinnamic acid to obtain modified sulfonated phenolic resin; and adding acrylamide, sodium acrylate, 2-acrylamido-2-methylpropanesulfonic acid, a dissolution promoter, a temperature-resistant and salt-resistant functional monomer, the modified sulfonated phenolic resin, an initiator and a chain transfer agent into a reactor, and carrying out a copolymerization reaction to obtain the sulfonated phenolic resin modified polyacrylamide. The sulfonated phenolic resin modified polyacrylamide prepared by the invention has excellent solubility, salt resistance and high temperature resistance, and has good viscosity in saline water with the salinity of 85000 mg / L at 30 DEG C and saline water with the salinity of 32000 mg / L at 85 DEG C, and the viscosity retention rate after 2 hours is 90% or above.

Description

technical field [0001] The invention relates to the technical field of polymer polymerization, in particular to polyacrylamide modified by sulfonated phenolic resin and a preparation method thereof, which can be applied in the technical field of petroleum exploitation. Background technique [0002] Polyacrylamide (PAM) is a water-soluble linear high molecular polymer. There are amide active groups in its molecular structure, and it is easy to obtain various modified products with branched chain or network structure through grafting or crosslinking. PAM can introduce various ionic groups to obtain specific properties. It is widely used in various fields such as chemical industry, metallurgy, geology, coal, petroleum, papermaking and water treatment. Most commonly, PAM is used as an oil displacement agent to enhance oil recovery. [0003] PAM aqueous solution has a high viscosity, so it is often used to reduce the water phase permeability, adjust the water-oil mobility ratio,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/06C08F220/56C08F220/58C08F226/10C08F222/40
CPCC08F283/002C08F220/06C08F220/56C08F220/585C08F226/10C08F222/402
Inventor 荣敏杰吴玉涛许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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