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Composite hydrate kinetic inhibitor based on vinyl imidazole copolymer and application thereof

A kinetic inhibitor, vinylimidazole technology, applied in the field of composite hydrate kinetic inhibitor, can solve the problems of insufficient inhibitory effect, poor biodegradability of the copolymer, complicated production process, etc., to improve the overall inhibitory performance, water solubility, etc. and environmental protection improvement, the effect of a wide range of applications

Active Publication Date: 2019-05-17
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing polymers have poor hydrophilicity, the synthesized copolymers have poor biodegradability, and the production process is complicated. The applicable maximum supercooling degree is only 10°C-12°C, the inhibition effect is insufficient, and the application occasions are limited. question

Method used

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  • Composite hydrate kinetic inhibitor based on vinyl imidazole copolymer and application thereof
  • Composite hydrate kinetic inhibitor based on vinyl imidazole copolymer and application thereof
  • Composite hydrate kinetic inhibitor based on vinyl imidazole copolymer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 Shown, the preparation method of vinylimidazole copolymer comprises the steps:

[0036] Under nitrogen protection, 9.6 mL of vinylimidazole, 10 g of vinyl caprolactam, 0.068 g of azobisisobutylimidazoline hydrochloride and 100 mL of water were fully mixed in a 250 mL three-necked flask. The radical solution polymerization reaction was carried out at a stirring rate of 300 rpm and an oil bath of 80° C. for 7 hours, and the oil bath and stirring were turned off. After the solution was cooled to room temperature, the solution was transferred to a round bottom flask. The solution was rotary evaporated at 90°C until the precipitation was complete, cooled to room temperature, and then dropped into a large amount of cold anhydrous ether for precipitation, and the obtained solid was washed and dried in vacuum at 60°C for 24 hours.

[0037] Fourier transform infrared spectroscopy and carbon nuclear magnetic resonance were used to characterize the characteristi...

Embodiment 2

[0039] The preparation method of vinylimidazole copolymer comprises the steps:

[0040] Under the protection of nitrogen, the monomer N-vinylcaprolactam, 1-vinylimidazole and deionized water were mixed uniformly in a three-necked flask, and the mass ratio of N-vinylcaprolactam to 1-vinylimidazole was 5:1. The adding amount of ionic water is 3:1 with the total mass ratio of polymer monomer, after fully stirring, dropwise add initiator azobisisobutylimidazoline hydrochloride (the quality of azobisisobutylimidazoline hydrochloride is 0.5% of the mass of deionized water), heated up to 80°C and reacted for 7 hours, then stopped the reaction to obtain the reaction liquid; when the reaction liquid was cooled to room temperature, it was dried by rotary evaporation at 90°C; after the precipitation was complete, drop into the precipitate Wash with a large amount of cold anhydrous ether, repeat the operation 3 times, place in a vacuum drying oven, and dry to constant weight to obtain pol...

Embodiment 3

[0043] The preparation method of vinylimidazole copolymer comprises the steps:

[0044] Under the protection of nitrogen, the monomer N-vinylcaprolactam, 1-vinylimidazole and deionized water were mixed uniformly in a three-necked flask, and the mass ratio of N-vinylcaprolactam and 1-vinylimidazole was 20:1. The addition of ionized water is 6:1 with polymer monomer mass ratio, after fully stirring, drip initiator azobisisobutylimidazoline hydrochloride (the quality of azobisisobutylimidazoline hydrochloride is de- 0.1% of the mass of ionic water), heated up to 95°C and reacted for 7 hours, then stopped the reaction to obtain the reaction solution; when the reaction solution was cooled to room temperature, it was dried by rotary evaporation at 90°C; after the precipitation was complete, a large amount of After washing with cold anhydrous ether and repeating the operation 3 times, place in a vacuum drying oven and dry to constant weight to obtain poly(vinyl caprolactam-vinylimida...

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Abstract

The invention provides a composite hydrate kinetic inhibitor based on a vinyl imidazole copolymer and an application thereof. The composite hydrate kinetic inhibitor is prepared from a vinyl imidazolecopolymer and an assisting agent, wherein the assisting agent is N-butyl-N-methylpyrrolidinium tetrafluoroborate and diethylene glycol monobutyl ether, the structure of the vinyl imidazole copolymeris as shown in a formula I (described in the specification), wherein n is equal to 10-600, m is equal to 2-900, and the molecular weight distribution coefficient of the vinyl imidazole copolymer is between 1.2 and 1.8. By introducing 1-Vinylimidazole in the process of copolymer synthesizing, through the strong hydrophilicity and biodegradability of imidazole five-membered ring, compared with a single homopolymer PVCap, the water solubility and environmental friendliness of the copolymer inhibitor are improved.

Description

Technical field: [0001] The invention relates to the technical field of hydrate inhibitors, in particular to a compound hydrate kinetics inhibitor based on vinylimidazole copolymer and its application. Background technique: [0002] The clogging of oil and gas production and transmission pipelines due to the formation of hydrates is a thorny problem that has plagued the oil and gas industry for a long time. For deep-sea pipeline transportation of offshore oil and gas fields, the low temperature and high pressure conditions on the seabed are very suitable for the formation of hydrates, and the problem of hydrates is particularly prominent. Therefore, how to prevent hydrate formation has always attracted the attention of the oil and gas industry. Traditional hydrate control methods include thermodynamic suppression method and new kinetic control method. [0003] The thermodynamic suppression method is to make the system not have the thermodynamic conditions for hydrate forma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/02C08F226/08
Inventor 龙臻丁启航梁德青
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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