Betaine type salt-resistant polymer and preparation method thereof

A technology of polymer and betaine, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of inability to meet market demand and limited product types, and achieve easy industrial production, convenient operation and mild reaction conditions. Effect

Inactive Publication Date: 2012-07-18
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, compared with the international level, my country has relatively little research on betaine, especially polybetaine (polybetaine) polyme

Method used

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  • Betaine type salt-resistant polymer and preparation method thereof
  • Betaine type salt-resistant polymer and preparation method thereof
  • Betaine type salt-resistant polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The synthesis of embodiment 1 betaine type salt-resistant polymer

[0034] (1) Synthesis of Acryloyl Chloride

[0035] Put a 150ml single-mouth round bottom flask into an oil bath, add 57g of acrylic acid, 140g of benzoyl chloride and a small amount of hydroquinone polymerization inhibitor, condense and reflux at 80°C for 3h under uniform stirring, and distill under reduced pressure with a diaphragm vacuum pump for 0.5h. Add a small amount of hydroquinone to the collection bottle and place it in a water bath at 3±0.1°C. 16.5 g of acryloyl chloride was obtained as a colorless and transparent liquid product.

[0036] (2) Synthesis of propylene diamine quaternary ammonium salt

[0037] Dissolve 12g of chloroacetic acid in 20g of pure water, add 7.4g of anhydrous sodium carbonate to pH6.5-7, and filter to remove a small amount of insoluble sodium carbonate. The filtrate was poured into a 150ml single-necked flask, and 10g of N,N-dimethyl-1,3-propanediamine was slowly add...

Embodiment 2

[0042] The structural characterization of embodiment 2 acrylamidopropyl betaine

[0043] figure 1 It is the proton nuclear magnetic resonance spectrogram of the acrylamidopropyl betaine prepared in embodiment 1, and the proton displacement δ is: methyl (3.293), methylene (1.860 to 2.860) in the propylenediamine group, acrylamide group The N-H bond in (2.823), the CH2=CH double bond in the acrylamide group (around 5.7 and 6.3), the methylene group in the chloroacetic acid group (3.071).

[0044] It can be seen from the analysis of the spectrogram data that the product is acrylamidopropyl betaine.

Embodiment 3

[0045] The structural characterization of embodiment 3 polymer

[0046] figure 2 It is the copolymer infrared spectrogram of the acrylamidopropyl betaine / acrylamide / N-alkylacrylamide prepared in Example 1, and it is known by the analysis of the spectrogram: 1734cm -1 Is the C=O vibration peak; 1600cm -1 Is amide (secondary amine) vibration characteristic peak; 3575cm -1 Is the N-H vibration peak; 1398cm -1 Is the methyl vibration peak; 1481cm -1 Is the methylene vibration peak; 1670cm -1 Is the characteristic peak of quaternary ammonium N; 1123cm -1 is the C-N vibration peak of aliphatic amines.

[0047] Various functional groups of the polymer were analyzed by infrared spectroscopy, and the results showed that the synthesized polymer had the characteristics of acrylamidopropyl betaine / acrylamide / N-alkylacrylamide copolymer.

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Abstract

The invention relates to a betaine type salt-resistant polymer and a preparation method thereof. The functional monomer acrylamide propyl betaine of the polymer is synthesized by the following steps: reacting benzoyl chloride with acrylic acid in a molar ratio of 1:0.8, and distilling at reduced pressure to obtain acryloyl chloride; reacting N,N-dimethyl-1,3-propane diamine with sodium chloroacetate in an aqueous solution in an equal molar to obtain propane diamide quaternary ammonium salt; reacting acryloyl chloride with propane diamide quaternary ammonium salt in a saturated sodium carbonate aqueous solution in a molar ratio of 1.1:1; and extracting and drying to obtain the functional monomer. The functional monomer is copolymerized with acrylamide and N-alkyl acrylamide to obtain the betaine type salt-resistant polymer. The betaine type salt-resistant polymer has obvious tackifying property and anti-electrolyte effect, the viscosity of the polymer increases along with the increase of the salt concentration, and the polymer has excellent salt-resistant property especially divalent calcium and magnesium ions resisting property; and the synthesis method of the betaine type salt-resistant polymer is mild in reaction condition and simple and easy to operate, and is hopeful to be used in the aspects of salt-resistant work liquid in an oil field, daily chemical products, dyes, medicines, novel materials and the like.

Description

technical field [0001] The invention relates to a viscosifier, a daily chemical, a betaine type salt-resistant polymer used as an oil displacement agent for tertiary oil recovery and a preparation method thereof. Background technique [0002] Betaine (betaine) is a water-soluble alkaloid widely present in animal and plant tissues. It is an effective osmotic dissolving agent and has an important role in substance metabolism. It has been widely used in medicine, daily chemical and other fields. [0003] The betaine molecule has cationic groups (such as quaternary ammonium groups) and anionic groups (such as carboxyl groups, sulfonic acid groups) at the same time, and the molecule as a whole is electrically neutral. It exhibits the characteristics of cationic compounds in acidic solution, and the characteristics of anionic compounds in alkaline solution. It has no cloud point and is not easily affected by inorganic electrolytes. It will not form a hydrophobic surface no matter ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/60C08F220/54C08F4/40C09K8/588
Inventor 陈洪王梓民叶仲斌韩利娟罗平亚
Owner SOUTHWEST PETROLEUM UNIV
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