Novel hydrate dynamic inhibitor as well as preparation method and application thereof

A technology of kinetic inhibitors and hydrate inhibitors, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unsatisfactory inhibitory effect, loss of inhibitory effect, and limited application range, so as to reduce hydrate The effect of generation rate, good suppression effect, and wide applicability

Active Publication Date: 2018-06-29
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, its application range is limited due to its poor water solubility, unsatisfactory inhibitory effect, and even loss of inhibitory effect under higher supercooling conditions (supercooling greater than 7°C).

Method used

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  • Novel hydrate dynamic inhibitor as well as preparation method and application thereof
  • Novel hydrate dynamic inhibitor as well as preparation method and application thereof
  • Novel hydrate dynamic inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The hydrate kinetic inhibitor (referred to as PVPC) as shown in formula I 6 h 5 )Synthesis

[0025]

[0026] The synthetic method comprises the following steps: Weigh 352mg (2mmol) of the chain initiator azobisisobutyronitrile into a 250mL eggplant-shaped reaction bottle, seal it with a rubber stopper, and then vacuumize and blow nitrogen three times; slowly add N-vinylpyrrole oxalanone monomer 20mL (206mmol), ethylbenzene 0.56mL (about 4.6mmol) and N,N-dimethylformamide solvent 100mL, with liquid nitrogen freezing-pumping-heating cycle 3 times; in nitrogen atmosphere at 80 The reaction was carried out at ℃ for 7 hours; the obtained primary product was cooled to room temperature and then slowly dripped into 1000 mL of ethyl acetate at -10 ℃ for recrystallization, suction filtration, and the obtained solid was dried to obtain the target product. The weight average molecular weight (Mw) is 56752, its 1 HNMR spectrum (CD 3 CN as solvent) such as figur...

Embodiment 2

[0029] Embodiment 2: inhibition effect evaluation

[0030] The method for inhibiting effect evaluation of the present invention is as follows:

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PUM

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Abstract

The invention discloses a novel hydrate dynamic inhibitor of a structural formula I as shown in the description. The inhibitor is high in inhibition activity, good in inhibition effect, small in amount and low in cost, is capable of effectively prolonging the nucleation time of hydrate and reducing the generation velocity of the hydrate with a low dosage concentration (0.5-2wt%) in a high supercooling degree environment, is applicable to coexistence systems of three phases of oil, gases and water or two phases of oil and water or two phases of gases and water, can be applied to inhibition of generation of hydrate in the oil-gas exploration, processing and conveying process, is not limited by supercooling degrees or application situations, and has wide application prospects.

Description

Technical field: [0001] The invention relates to the technical field of chemical industry, in particular to a novel hydrate kinetics inhibitor and its preparation method and application. Background technique: [0002] The guarantee of flow safety is one of the major problems faced by the oil and gas industry, among which it is especially important to prevent the formation of natural gas hydrate, because once natural gas hydrate is formed, it will cause the failure of oil and gas extraction equipment and blockage of pipelines, affecting normal operation. oil and gas extraction, transportation and operations. Natural gas hydrate is an ice-like, non-stoichiometric clathrate complex formed by water and some light gases (hydrogen, carbon dioxide, nitrogen, methane, ethane, hydrogen sulfide, etc.) under high pressure and low temperature conditions . [0003] The methods to prevent the formation of hydrates include the following three methods: 1. Change the environmental conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524C08F126/10
CPCC08F126/10C09K8/524C09K2208/22
Inventor 梁德青张倩史伶俐
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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