Gemini quaternary ammonium salt anti-agglomerant, synthesis method thereof, and method for inhibiting hydrate agglomeration

A technology of a gemini quaternary ammonium and a synthesis method is applied to a hydrate anti-polymerization agent, inhibiting hydrate accumulation in the process of oil-gas-water three-phase mixed transportation, a gemini quaternary ammonium salt anti-polymerization agent and the synthesis field thereof, so as to prevent the The effect of hydrate accumulation, reduction of system viscosity, and efficient transportation

Active Publication Date: 2015-01-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of inhibiting hydrate accumulation can effectively solve the problem of flow safety guarantee of oil-gas-water multiphase mixed transportation pipeline

Method used

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  • Gemini quaternary ammonium salt anti-agglomerant, synthesis method thereof, and method for inhibiting hydrate agglomeration
  • Gemini quaternary ammonium salt anti-agglomerant, synthesis method thereof, and method for inhibiting hydrate agglomeration
  • Gemini quaternary ammonium salt anti-agglomerant, synthesis method thereof, and method for inhibiting hydrate agglomeration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a kind of gemini quaternary ammonium salt antipolymerization agent, the structure of this antipolymerization agent is shown in formula II,

[0063]

[0064] The synthetic method of this gemini quaternary ammonium salt antipolymerization agent comprises the following steps:

[0065] Step (1): Using tetrahydrofuran as a solvent, add tetrahydrofuran and 0.1mol N,N-dimethylglycine into the three-necked flask, then put the three-necked flask into a constant temperature water bath and stir at 30-50°C, use hydrochloric acid and / or sodium hydroxide to adjust the pH value to 4-6, then slowly add excess epichlorohydrin to the there-necked bottle, so that the molar ratio of epichlorohydrin to N,N-dimethylglycine is 3:1, so that N,N-dimethylglycine is completely reacted, and the reaction progress is measured by thin-layer chromatography in the reaction process. When the product no longer changes, the reaction is complete, and then excess epichlorohydri...

Embodiment 2

[0072] This embodiment provides a method for inhibiting the accumulation of hydrates during oil-gas-water three-phase mixed transportation, which includes the following steps: adding the gemini quaternary ammonium salt anti-polymerization agent in Example 1 to the oil phase first, and then The oil phase added with gemini quaternary ammonium salt antipolymerization agent is mixed with water phase and gas phase to form a mixture. In the oil-gas-water three-phase, based on the total volume of the oil-water two-phase, the volume content of water is not higher than 50%; - 1.0-10.0% of the mass of water in the three-phase water (preferably, the amount of the gemini quaternary ammonium antipolymerization agent is 2.0-5.0% of the mass of water in the oil-gas-water three-phase); The temperature of oil-gas-water three-phase mixed transportation is 0-20℃, and the pressure is 0.5-20.0MPa.

Embodiment 3

[0074] This example provides an evaluation experiment of the gemini quaternary ammonium salt antipolymerization agent in Example 1.

[0075] The implementation device used in the anti-aggregation agent evaluation experiment can be a visualized transparent sapphire high-pressure reactor and its supporting system, which mainly consists of five sapphire kettles, air baths, temperature measuring instruments, pressure measuring instruments, stirring systems and automatic computer data acquisition systems. Partial composition. The transparent sapphire autoclave is a commonly used device for studying hydrate technology, such as image 3 As shown, the antipolymerization agent evaluation implementation equipment can specifically include: sapphire kettle 1, air bath 2, first resistance temperature detector 3, second resistance temperature detector 4, HEISE pressure gauge 5, differential pressure sensor 6, Magnet 7, rotor 8, piston 9, gas bottle 10, hand pump 11, data acquisition system...

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Abstract

The invention provides a gemini quaternary ammonium salt anti-agglomerant, a synthesis method thereof, and a method for inhibiting hydrate agglomeration. The structure of the anti-agglomerant is represented by the formula I, which is shown in the description, wherein in the formula I, the R1 represents a straight-chain alkyl group or a branched alkyl group with a carbon number of 5 to 30, the R2 represents an H atom or a straight-chain alkyl group / branched alkyl group with a carbon number of 1 to 10, and X- represents F-, Cl-, Br-, or I-. The synthesis method comprises the following steps: making N,N-dimethylglycine or N,N-dimethylglycine ester carry out reactions with epoxy chloropropane so as to obtain a quaternary ammonium salt intermediate; and then making the quaternary ammonium salt intermediate carry out reactions with primary amine so as to obtain the anti-agglomerant. The method for inhibiting hydrate agglomeration comprises a step of mixing the gemini quaternary ammonium salt anti-agglomerant with three phases of oil-gas-water. The anti-agglomerant is capable of effectively inhibiting the hydrate from agglomerating, has the characteristics of high efficiency, low consumption, stability, and economy, and is especially suitable for preventing agglomeration of hydrate during the mixed oil-gas-water transportation process.

Description

technical field [0001] The present invention relates to a hydrate antipolymerization agent, in particular to a gemini quaternary ammonium salt antipolymerization agent and its synthesis method, and the method of using the antipolymerization agent to inhibit hydrate accumulation in the process of oil-gas-water three-phase mixed transportation The method belongs to the technical field of organic compound synthesis and oil and gas transportation. Background technique [0002] Some low-boiling hydrocarbons such as methane, ethane, propane, n-butane, isobutane, etc., are substances that exist in oil or natural gas. These substances can combine with water in oil and gas. Under certain conditions (generally It is a low temperature and high pressure condition) to form gas hydrate. This kind of gas hydrate usually exists in liquid in the form of solid, so the formation of hydrate solid usually affects the production and transportation of oil and gas companies, such as hydrate solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/16C07C227/16C09K8/524
Inventor 孙长宇陈光进李实陈俊闫柯乐张可李楠李文志
Owner PETROCHINA CO LTD
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