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Chitosan cross-linked and modified acrylamide compound as well as preparation method thereof and application thereof

A chitosan cross-linking and acrylamide technology, which is applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as high price and achieve the effects of low cost, good stability and simple reaction process

Inactive Publication Date: 2016-10-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used functional monomers can improve the temperature and salt resistance of acrylamide profile control agents to a certain extent, but they are expensive

Method used

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  • Chitosan cross-linked and modified acrylamide compound as well as preparation method thereof and application thereof
  • Chitosan cross-linked and modified acrylamide compound as well as preparation method thereof and application thereof
  • Chitosan cross-linked and modified acrylamide compound as well as preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]A kind of preparation method of chitosan crosslinking modified acrylamide compound, its preparation steps are as follows:

[0045] 1) At 60°C, completely dissolve 0.08g of chitosan in 50mL of glacial acetic acid with a mass fraction of 2%, add 0.15g of potassium persulfate, and after 10min, add 50mL of 8g of acrylamide, at 100 rpm Carry out free radical polymerization reaction 2h under the stirring speed of 2h, synthesize the first step product;

[0046] 2) The product obtained in step 1) was placed at 100° C. for a nucleophilic reaction for 4 hours to obtain the final polymer gel.

[0047] Infrared spectroscopy tests were carried out on chitosan and the polymer gel purified by ethanol. Obtain the infrared spectrogram, as attached figure 1 The spectrogram analysis results are shown in Table 1.

[0048] Table 1 FTIR analysis results of CS and AM / CS crosslinked polymers

[0049]

[0050] Depend on figure 1 And Table 1 shows that: with figure 1 Compared with the sp...

Embodiment 2

[0052] Taking the amount of acrylamide as a variable, 6 sets of experiments were carried out to prepare chitosan cross-linked modified acrylamide compounds. The preparation steps are as follows:

[0053] 1) At 60°C, completely dissolve 0.08g of chitosan in 50mL of 2% glacial acetic acid, add 0.15g of ammonium persulfate, and after 10min, add a certain amount of acrylamide solution 50mL, at 100 Carry out free radical polymerization reaction 2h under the stirring speed of revolution / second, synthesize the first step product;

[0054] 2) Place the product obtained in step 1) at 100°C for a nucleophilic reaction for 3 hours to obtain a polymer gel (the product of the second step);

[0055] Wherein, the consumption of acrylamide is shown in Table 1.

[0056] During the test, NDJ-8S viscometer was used to measure the viscosity of the first step product and the second step product. The influence of the amount of acrylamide on the viscosity of the system is shown in the attached fi...

Embodiment 3

[0061] With the amount of chitosan as a variable, 5 sets of experiments were carried out to prepare chitosan cross-linked modified acrylamide compounds. The preparation steps are as follows:

[0062] 1) At 60°C, a certain amount of chitosan was completely dissolved in 50 mL of glacial acetic acid with a mass fraction of 2%, and 0.15 g of potassium persulfate-sodium sulfite was added (the molar ratio of the two was 1:1). After 10 min, Then add 50 mL of a solution of 8 g of acrylamide, carry out free radical polymerization for 2 h at a stirring speed of 100 rpm, and synthesize the product of the first step;

[0063] 2) Place the product obtained in step 1) at 100°C for a nucleophilic reaction for 3.5 hours to obtain a chitosan cross-linked modified acrylamide compound (the product of the second step);

[0064] Wherein, the consumption of chitosan is shown in Table 2.

[0065] During the test, the viscosity of the first step product and the second step product was measured with ...

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Abstract

The invention discloses a chitosan cross-linked and modified acrylamide compound as well as a preparation method thereof and application thereof, and belongs to the field of oilfield chemistry. The preparation method for the chitosan cross-linked and modified acrylamide compound comprises the following steps: 1) at a temperature being 50-70 DEG C, completely dissolving 0.04-0.12g of a biological type cross-linking agent chitosan into 50 mL of acid, adding 0.05-0.25g of an initiator, adding 50 mL of a solution with 6-8.5g of the acrylamide after certain time, and carrying out free radical polymerization reaction at certain stirring speed, thereby synthesizing a first product; and putting a product obtained in the step 1) at a temperature being 90-110 DEG C to carry out nucleophilic reaction, thereby obtaining polymer gel. The gel prepared by the preparation method is economical and environmental-friendly, has a cross-linked net-shaped structure, further has good shearing resistance, temperature and salt resistance, and can be used as a gel profile control agent.

Description

technical field [0001] The invention relates to a chitosan cross-linked modified acrylamide compound and a preparation method and application thereof, belonging to the field of oil field chemistry. technical background [0002] Petroleum is one of the important strategic materials of the country, and it is also an important basic raw material for the development of the petrochemical industry, which is related to the overall situation of the national economy. At present, the entire oil industry is facing the huge dilemma of contradiction between supply and demand. The demand for oil resources in the society is increasing, while the extraction of crude oil has gone through the past conventional extraction stage with the development of most oil fields (using a and secondary oil recovery technology can only extract 20% to 40% of crude oil), began to enter the stage of high water cut production decline, and the number of new oil fields determined by national surveys is also less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08J3/24C08J3/075C09K8/516C09K8/508C08L51/02
CPCC08F251/00C08J3/075C08J3/24C08J2351/02C09K8/5083C09K8/516C08F220/56
Inventor 杨隽王芬潘小杰范志玮徐黎刚徐恩松
Owner WUHAN INSTITUTE OF TECHNOLOGY
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