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Acrylamide type polymer, preparation method and applications thereof

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: 2015-09-23
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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  • Acrylamide type polymer, preparation method and applications thereof
  • Acrylamide type polymer, preparation method and applications thereof
  • Acrylamide type polymer, preparation method and applications thereof

Examples

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preparation example Construction

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

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

[...

Embodiment approach

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

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

[0067] (2) Let the reactant obtained in step (1) stand still, separate the organic phase, wash it several times with an aqueous sodium chloride solution (preferably with a concentration of about 10% by weight) to remove water-soluble substances, and then use anhydrous sulfuric acid Dry the sodium and evaporate the organic solvent to obtain an orange-red viscous liquid—the crude product of N-terminal amino polyether a...

Embodiment 1

[0099] Put 1 mole of double-end amino polyether (structure like formula (I-1), R 2 =R 3 =H, n=2), 15 moles of dichloromethane and 1 mole of sodium hydroxide (made into an aqueous solution with a concentration of 40% by weight) are added to a reaction flask equipped with a cooling device, the temperature is reduced to 5°C, and then 1 Molar of acryloyl chloride, the temperature does not exceed 15°C during the addition, after the addition of acryloyl chloride, react at below 15°C for 0.5h; the resulting reactant is allowed to stand, the organic phase is separated, and washed with a NaCl aqueous solution with a concentration of 10% by weight 3 times, dry with anhydrous sodium sulfate, distill off the organic solvent to obtain an orange-red viscous liquid-crude product, and wash the crude product with acetone to obtain a polymer grade product. The product was subjected to infrared spectroscopy. by figure 1 It can be clearly seen that the primary amine group peaks in the polymer gra...

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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 type polymer and its preparation method and application. Background technique [0002] In the process of oil drilling, the formations encountered are becoming more and more complex. The number of special wells, ultra-deep wells and complex wells is increasing year by year. This puts forward higher requirements for drilling fluids, but traditional linear polymer drilling fluid treatment agents can no longer fully satisfy drilling Needs. With the development of unconventional oil and gas represented by shale gas, new requirements for drilling fluid performance have been put forward. In order to meet the needs of wellbore stability and lubrication and anti-sticking, 60% to 70% of shale gas horizontal wells abroad use oil Oil-based drilling fluid systems are used in most shale gas horizontal wells recently completed in China. Due to the high cost of oil-based drilling fluid and environmental pollution, water-based drilli...

Claims

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Application Information

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