Polymer and its preparation method and application, and processing method for oily sewage

A treatment method and polymer technology, applied in the field of polymers, can solve the problems of high difficulty in treatment, high specificity of emulsion, and the need to improve the oil removal rate, so as to achieve improved oil removal rate, short treatment time and wide application range Effect

Active Publication Date: 2013-01-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As many oilfields in my country have entered the stage of secondary oil recovery and tertiary oil recovery, the widespread use of water injection flooding and the wide application of enhanced oil recovery technologies such as chemical flooding and steam flooding, various production stimulation measures such as acidizing, fracturing, profile control, and water shutoff The implementation of the oil-in-water (O / W) emulsion in the oilfield production fluid increases the proportion, the degree of emulsification of the O / W emulsion becomes more serious, and the emulsion becomes more and more stable, making the treatment more and more difficult , when adopting the disclosed crude oil pre-dehydrating agent cationic polymer of above-mentioned CN101368110A as the demulsifier, the oil removal rate still needs to be improved

Method used

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  • Polymer and its preparation method and application, and processing method for oily sewage
  • Polymer and its preparation method and application, and processing method for oily sewage
  • Polymer and its preparation method and application, and processing method for oily sewage

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preparation example Construction

[0039] The present invention also provides a method for preparing a polymer, wherein the method comprises: the method comprises:

[0040]Under polymerization conditions, the acrylic acid ester hydrophobic monomer shown in structural formula (4), methacryloyloxyethyl trimethyl ammonium chloride and structural formula (5) The solution of the solution is contacted in the presence of an initiator, and the degree of contact makes the intrinsic viscosity of the product obtained after contacting be 33-362ml / g;

[0041]

[0042] Among them, R represents H or -(CH 2 ) m -OH, 1≤m≤5, m is a positive integer; 1≤n≤5, n is a positive integer;

[0043] Based on the total amount of the acrylic hydrophilic monomer shown in structural formula (4), methacryloyloxyethyltrimethylammonium chloride and the acrylate hydrophobic monomer shown in structural formula (5), The amount of the acrylic hydrophilic monomer is 50-67% by weight, the amount of methacryloyloxyethyltrimethylammonium chloride ...

Embodiment approach

[0056] According to a preferred embodiment of the present invention, the preparation method of described polymer comprises the following steps:

[0057] Step 1, add part of acrylic acid or hydroxypropyl acrylate, methacryloyloxyethyltrimethylammonium chloride and propyl acrylate, surfactant and solvent into the reactor, stir well until completely dissolved.

[0058] Step 2: install a constant-pressure separatory funnel on the reactor, replace the air in the reactor with nitrogen and feed in nitrogen continuously, heat to raise the temperature, and add an initiator under the condition of 30-60°C to start the reaction. During the reaction, the remaining acrylic acid or hydroxypropyl acrylate is added dropwise, and the addition is completed within 0.5 to 1 hour. The reaction time is not less than 4h.

[0059] Step 3: Cool down to 10-20°C, precipitate with absolute ethanol or acetone, and dry to obtain a white or light yellow solid; or directly discharge as a solution product to ...

Embodiment 1

[0071] Steps:

[0072] Step 1, weigh 1 gram of butyl acrylate, 0.648 grams of cetyltrimethylammonium bromide, 9 grams of methacryloyloxyethyltrimethylammonium chloride, 5 grams of acrylic acid and 80 grams of deionized water and add Into the reactor, stir well until completely dissolved.

[0073] Step 2, install a constant pressure separatory funnel on the reactor, replace the air in the reactor with nitrogen and feed nitrogen continuously, heat up to 30°C, add 0.0486 gram of sodium thiosulfate, potassium persulfate and azo (2- Amidinopropane) dihydride (the weight ratio of the three is 1:2:1) to start the reaction. Add 40 g of deionized water and 15 g of acrylic acid into a constant pressure separatory funnel, add dropwise at a constant speed and complete the dropwise addition within 0.5 to 1 hour. Total reaction 4h.

[0074] Step 3, cooling down, precipitating with absolute ethanol, and drying to obtain a white solid.

[0075] The polymer had an intrinsic viscosity of 31...

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Abstract

The invention provides a polymer and its preparation method and application, and a processing method for oily sewage. The structural unit of polymer is composed of a acrylic acid hydrophilic structural unit, a cation structural unit, and an acrylate hydrophobic structural unit, with content being (by weight percentage) 50-67, 30-48, and 2-10. Intrinsic viscosity of polymer is 33-362 mL / g. The preparation method of the polymer includes contacting acrylic acid hydrophilic structural unit, methacryloxyethyltrimethyl ammonium chloride and acrylate hydrophobic structural unit in existence of initiator. The polymer can be used in oily sewage treatment.

Description

technical field [0001] The invention relates to a polymer, a preparation method of the polymer, an application of the polymer in oily sewage treatment and a treatment method of oily sewage. Background technique [0002] Oily sewage will cause water pollution and destroy the ecological balance. In order to avoid environmental pollution and waste of water resources, it is generally necessary to reuse oily sewage, which requires effective treatment of oily sewage. [0003] This problem is particularly prominent in oilfield wastewater treatment. At present, the oil content of oilfield polymer flooding wastewater treatment in my country has increased from 200-300mg / L to 1000-3000mg / L, even as high as 5000mg / L. Since the sewage contains a large amount of polymers, the viscosity of the water phase increases, the oil-carrying ability of the water phase increases, and the difficulty of oil-water separation is also increased. Moreover, it is difficult to meet the water quality requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/18C08F220/34C08F220/28C02F1/56
Inventor 侯丹丹徐伟梁泽生田云峰
Owner CHINA PETROLEUM & CHEM CORP
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