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Water-soluble fluorescent tracing polymer and its preparation method

A fluorescent polymer, polymer technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of susceptibility to interference, large detection error, high cost, and achieve high detection sensitivity, stable fluorescence performance, The effect of mild reaction conditions

Inactive Publication Date: 2012-10-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the tracers commonly used in oilfields mainly include chemical tracers and isotope tracers, but they all have different degrees of disadvantages: chemical tracers are used in large quantities, cost is high, and detection errors are large; isotope tracers Agents require professional construction personnel and use special equipment for detection, which is not conducive to large-scale promotion and application
Many fluorescent dyes cannot be applied due to their short validity period and susceptibility to interference

Method used

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  • Water-soluble fluorescent tracing polymer and its preparation method
  • Water-soluble fluorescent tracing polymer and its preparation method
  • Water-soluble fluorescent tracing polymer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of fluorescent monomer allyl-7-diethylamino-4-methylcoumarin ammonium bromide

[0040] The preparation reaction (3) is as follows:

[0041]

[0042] (3)

[0043] Put the round bottom flask into an oil bath, add 0.5775g (0.0025mol) of 7-diethylamino-4-methylcoumarin, dissolve it with 10mL of acetonitrile, and add 0.4537g (0.00375mol) of bromopropene dropwise under uniform stirring. mol), condensed and refluxed, the temperature of the oil bath was raised to 80°C, and the reaction was carried out at this temperature for 20 hours. After cooling, distill under reduced pressure, pour the product into ether for recrystallization, then distill under reduced pressure and dry to obtain a white solid product, allyl-7-diethylamino-4-methylcoumarin ammonium bromide, with a yield of 67.3%.

[0044] Using Agilent 6224 mass spectrometer to analyze the obtained fluorescent monomer, it can be seen that the molecular ion peak of the compound (ESI, m / z + ) is 2...

Embodiment 2

[0046] Example 2 Fluorescence Spectrum Test of Fluorescent Monomer

[0047] Weigh allyl-7-diethylamino-4-methylcoumarin ammonium bromide and dissolve it in the produced water of the oil well to make 100 μg / L. The slit width of the fixed fluorescence spectrometer is 10nm to scan the excitation spectrum and emission spectrum respectively. The excitation spectrum and emission spectrum of the fluorescent monomer solution are shown in the appendix figure 1 , the obtained maximum excitation wavelength and maximum emission wavelength are 381nm and 468nm respectively, the maximum emission wavelength is in the blue range of the visible spectrum (435nm-480nm), and has a strong fluorescence intensity.

[0048] With a fixed excitation wavelength of 381nm and a slit width of 10 nm, the fluorescence intensity of 10, 30, 50, 100, 200, 300 μg / L fluorescent monomer oilfield produced aqueous solution at 468nm was measured. For the specific fluorescence intensity test results, see the attached...

Embodiment 3

[0049] Example 3 Preparation of Fluorescent Polymer

[0050] The preparation reaction formula (4) is as follows:

[0051]

[0052] (4)

[0053] Add 0.01 g of allyl-7-diethylamino-4-methylcoumarin ammonium bromide, 0.005 g of OP-10 emulsifier and 40 g of deionized water into a 100 mL single-necked bottle equipped with electromagnetic stirring, fully After stirring until the emulsification is complete, add 5.99g of acrylamide, 4.0g of acrylic acid and 2.2222g of sodium hydroxide to make an aqueous solution with a concentration of 20% of the total monomer mass, adjust the pH of the system to 8, and turn on N 2 20 min; then add initiator ammonium persulfate solution and sodium bisulfite solution, the ratio of ammonium persulfate to sodium bisulfite is 1:1, the amount added is 0.5% of the total mass of the monomer, continue Access to N 2 After 20 min, react at a temperature of 50°C for 8h. After the reaction, the polymer is purified with absolute ethanol, the precipitate is...

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Abstract

The invention relates to a fluorescent monomer, a fluorescent tracing polymer and its preparation method. Its synthetic method comprises the following steps of: dissolving 7-diethylamino-4-methylcoumarin in a solvent, adding dropwisely bromopropylene, heating, cooling to obtain the fluorescent monomer allyl-7-diethylamino-4-methylcoumarin-ammonium bromide, and copolymerizing the fluorescent monomer with acrylamide and acrylic acid. The fluorescent polymer can be used as an oil field tracer to be applied in oilfield water-flooding and polymer flooding processes, and has good fluorescent tracer ability and chemical stability.

Description

technical field [0001] The invention relates to a method for preparing fluorescent monomers and fluorescent polymers suitable for oil field water injection and polymer flooding. Background technique [0002] Oilfield tracer technology is one of the on-site production test technologies. Its technology is to inject tracer from the injection well, and then take samples from the surrounding production wells according to certain sampling regulations, and monitor the change of the tracer over time, which can guide oil wells. Production design and late stage adjustment of oilfield development. For a long time, the tracers commonly used in oil fields mainly include chemical tracers and isotope tracers, but they all have different degrees of disadvantages: chemical tracers are used in a large amount, cost is high, and detection errors are large; isotope tracers Agents are required to be professional construction personnel, and special equipment is used for detection, which is not co...

Claims

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Application Information

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IPC IPC(8): C07D311/16C09K11/06C08F220/56C08F220/06C08F226/02G01N21/64
Inventor 闫立伟彭春香叶仲斌陈洪张义婷
Owner SOUTHWEST PETROLEUM UNIV
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