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A kind of acrylamide type polymer and its preparation method and application

An acrylamide-type, polymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor emulsification and dispersion performance, lack of polymerizable properties, and disappearance of polymerizable parts, etc., to achieve good reduction Filtration characteristics, good viscosity increasing effect, low energy consumption effect

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These polymerizable surfactants are mainly used in the emulsion polymerization of various monomers, but there are still the following problems in practical applications: high raw material prices or low yields lead to high product prices and are difficult to apply; emulsification and dispersion properties are not as good as traditional Surfactants; some synthetic reactions make the polymerizable part disappear, resulting in no polymerizable properties; some products or raw materials or production processes are not environmentally friendly, making it difficult to promote

Method used

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  • A kind of acrylamide type polymer and its preparation method and application
  • A kind of acrylamide type polymer and its preparation method and application
  • A kind of acrylamide type polymer and its preparation method and application

Examples

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preparation example Construction

[0062] According to the preparation method provided by the present invention, preferably, the contact between the double-terminated amino polyether represented by the formula (I-1) and the acryloyl halide represented by the formula (I-2) is carried out in an organic solvent and / or In the presence of an acid-binding agent, further preferably, the contact between the double-terminated amino polyether represented by the formula (I-1) and the acryloyl halide represented by the formula (I-2) is carried out in an organic solvent and an acid-binding agent It is carried out in the presence of moles, and the double-terminated amino polyether:organic solvent:acid agent is preferably 1:15-25:1.0-1.05, more preferably 1:18-22:1.0-1.02.

[0063]The organic solvent can be various organic solvents that can be used for the condensation reaction of amino groups and acyl halides, as long as they do not adversely affect the reaction. Preferably, the organic solvent is one or more of dichlorometh...

Embodiment approach

[0065] According to a preferred embodiment of the present invention, the preparation method of polyoxyethylene ether monomer represented by formula (I) comprises the following steps:

[0066] (1) Add double-terminated amino polyether, organic solvent and acid-binding agent solution with a concentration of 20-50% by weight into a reaction bottle equipped with a cooling device, cool down to below 5°C, and then slowly add acryloyl halide, During the addition process, the temperature should not exceed 15°C. After the acryloyl halide is added, react at a temperature below 10-20°C for 0.5-4 hours;

[0067] (2) Leave the reactant obtained in step (1) to stand, separate the organic phase, wash several times with aqueous sodium chloride solution (preferably at a concentration of about 10% by weight), remove the water-soluble substances therein, and then wash it with anhydrous sulfuric acid Sodium drying, and the organic solvent was evaporated to obtain an orange-red viscous liquid—the ...

Embodiment 1

[0099] 1 mole of double-terminated amino polyether (structure such as formula (I-1), R 2 =R 3 =H, n=2), 15 moles of dichloromethane and 1 mole of sodium hydroxide (formed into an aqueous solution with a concentration of 40% by weight) were added to the reaction flask equipped with a cooling device, cooled to 5°C, and then slowly added 1 moles of acryloyl chloride, the temperature during the addition process does not exceed 15°C, after the addition of acryloyl chloride is completed, react at a temperature below 15°C for 0.5h; the resulting reactant is left to stand, and the organic phase is separated and washed with a NaCl aqueous solution with a concentration of 10% by weight 3 times, dried with anhydrous sodium sulfate, evaporated the organic solvent to obtain an orange-red viscous liquid—the crude product, and washed the crude product with acetone to obtain a polymer grade product. The product was subjected to infrared spectroscopy. pass figure 1 It can be clearly seen th...

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Abstract

The invention provides an acrylamide type polymer, a preparation method and applications thereof. The acrylamide type polymer comprises a structural unit represented by the formula (1), a structural unit represented by the formula (2), a structural unit represented by the formula (3), and a structural unit composed of nonionic monomers; wherein the mole ratio of the structural unit represented by the formula (1) to structural unit represented by the formula (2) to structural unit represented by the formula (3) to structural unit composed of nonionic monomers is (0.05-0.5):(0.1-0.4):(0.01-0.2):(0.1-0.5). The acrylamide type polymer has a strong performance on resisting temperature and salts and a strong inhibiting performance. The operation of the adopted preparation method is simple, the product quality is stable, and the polymer is pollution-free to the environment, has a good fluid loss reducing characteristic under the conditions of high temperature (180 DEG C), high salt content, and existence of high-valent ions (calcium and magnesium), and has a good tackifying effect in clay-free saltwater drilling fluid.

Description

technical field [0001] The invention relates to an acrylamide polymer, a preparation method and application thereof. Background technique [0002] In the process of oil drilling, the drilled formations are becoming more and more complex, and the number of special wells, ultra-deep wells and complex wells is increasing year by year, which puts forward higher requirements for drilling fluids, but the traditional linear polymer drilling fluid treatment agents can no longer fully meet the requirements of drilling fluids. needs. With the development of unconventional oil and gas represented by shale gas, new requirements are put forward for the performance of drilling fluid. The oil-based drilling fluid system is used in most of the shale gas horizontal wells completed recently in China. Due to the high cost of oil-based drilling fluid and the pollution to the environment, water-based drilling fluid is the final choice. [0003] Studies have shown that when active shale is exp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/60C08F220/58C08F220/06C08F220/56C08F290/06C08F222/02C09K8/035
Inventor 王中华
Owner CHINA PETROLEUM & CHEM CORP
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