Salt-resistant monomer and preparation method thereof

A technology of salt-resistant monomers and monomers, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low retention rate, temperature-resistant and salt-resistant polymers, poor temperature and salt resistance, and poor salt resistance. , to achieve the effect of improving the viscosity retention rate

Active Publication Date: 2018-03-13
黑龙江吉地油田服务股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The present invention aims at providing a salt-resistant monomer and a preparation method thereof, which improves the existing salt-resistant polymer, because the temperature-resistant and salt-resistant polymers in the prior art are not heat-resistant and salt-resistant, and cannot be used for effective tertiary oil recovery. Poor salt tolerance, low retention rate, etc.

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0048] 1. Preparation of a novel salt-resistant monomer APPS

[0049] The invention provides a salt-resistant monomer APPS and a preparation method thereof, which comprise N-vinylpyrrolidone, a ring monomer with a double bond, acrylonitrile and a sulfonating agent. The salt-resistant monomer is obtained by adding N-vinylpyrrolidone, double-bonded ring monomer and acrylonitrile first, sulfonation, washing and neutralization.

Embodiment 1

[0051] A salt-resistant monomeric APPS consisting of the following components:

[0052] Acrylonitrile 53 parts

[0053] N-vinylpyrrolidone 194 parts

[0054] 1 part of ring monomer with double bond

[0055] Sulfonating agent 49 parts

[0056] Sodium hydroxide 20 parts

[0057] Preparation Process:

[0058] 1) Add 53 parts of acrylonitrile into a four-necked flask equipped with a reflux condenser, a thermometer, a stirrer and a dropping funnel, add a part of styrene into the four-necked flask, and slowly drop 194 parts of N-vinylpyrrolidone into In the four-necked flask, adjust the rotation speed to 400±20r / min, and pay attention to temperature control during the stirring process;

[0059] 2) Control the temperature in the four-neck flask to 10-13°C, slowly add 49 parts of oleum dropwise, and control the reaction temperature not to exceed the set value;

[0060] 3) After adding the fuming sulfuric acid dropwise, raise the reaction temperature to 25°C, and react at constan...

Embodiment 2

[0063] Acrylonitrile 318 parts

[0064] 48 parts of N-vinylpyrrolidone

[0065] 20 parts of ring monomer with double bond

[0066] Sulfonating agent 196 parts

[0067] Sodium hydroxide 80 parts

[0068] The preparation process of the salt-resistant monomer APPS is the same as in Example 1.

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Abstract

The invention discloses a salt-resistant monomer and a preparation method thereof and belongs to the technical field of high-molecular polymers. The salt-resistant monomer comprises N-vinyl pyrrolidone, ring monomer with double bonds, acrylonitrile and a sulfonating agent. The salt-resistant monomer is mainly used for water-solution, segmented and random polymerization modes and is mainly used for preparing salt-resistant polymers special for oil fields.

Description

technical field [0001] The invention belongs to the technical field of polymer polymerization, and in particular relates to a functional monomer for synthesizing a salt-resistant polymer, in particular to a salt-resistant monomer and a preparation method thereof. Background technique [0002] At present, among the polymers used in oil and gas development, partially hydrolyzed polyacrylamide (HPAM), copolymers of acrylamide and acrylic acid, biopolymers (xanthan gum), cellulose ether compounds, polyvinylpyrrolidone, etc., can be selected. There are only two types of polymer oil displacement agents used in large-scale oilfield tertiary oil recovery, HPAM and xanthan gum, and HPAM is the main one. HPAM has been widely used in polymer flooding in my country and has achieved good results, but HPAM products have poor shear stability and poor temperature and salt resistance. Xanthan gum has excellent salt resistance and shear resistance, but poor injectability and temperature resi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/10C08F220/48C08F212/14C08F228/02C08F220/56C09K8/588
CPCC08F220/56C08F226/10C08F228/02C09K8/588C09K8/882C08F220/48C08F212/14
Inventor 孙安顺
Owner 黑龙江吉地油田服务股份有限公司
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