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A Novel Hydrate Kinetic Inhibitor

A technology of kinetic inhibitor and hydrate inhibitor, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of loss of inhibitory effect, poor water solubility, etc., to reduce the generation rate, reduce the cost of reagents, and broaden the Applied effect

Active Publication Date: 2019-10-08
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, it has defects such as poor water solubility and loss of inhibitory effect under higher supercooling conditions (supercooling degree greater than 12°C).

Method used

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  • A Novel Hydrate Kinetic Inhibitor
  • A Novel Hydrate Kinetic Inhibitor
  • A Novel Hydrate Kinetic Inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Synthesis of the hydrate kinetic inhibitor (abbreviated as PVCSCOOH) whose structural formula is shown in formula II

[0026]

[0027] Among them, the average value of n is 115.

[0028] The synthesis method includes the following steps: weigh 176 mg of chain initiator azobisisobutyronitrile, 10 g of N-vinyl caprolactam monomer, measure 0.28 mL of thioglycolic acid, and 50 mL of N,N-dimethylformamide in 100 mL of eggplant Shaped reaction bottle, sealed with a rubber stopper, vacuumed-nitrogen 3 times, then frozen with liquid nitrogen-pumped-heating cycle 3 times; reacted in an oil bath at 80°C for 12 hours in a nitrogen atmosphere; the obtained primary product was cooled After reaching room temperature, it was slowly dropped into 500mL cold ether for recrystallization and suction filtration. The obtained solid was dried in a vacuum oven at 45°C for 48 hours and then at 105°C for 1 hour to obtain the target product weight average molecular weight (Mw ) ...

Embodiment 2

[0029] Embodiment 2: inhibition effect evaluation

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

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Abstract

Disclosed is a hydrate kinetic inhibitor of a structural formula as represented by formula I. The inhibitor of the present invention has a good water solubility, a high inhibitory activity, a capability of achieving a good inhibitory effect, a small usage amount and a reduced cost; has the advantages of a low dosage, a high efficiency, an extensive applicability, etc.; can be used in an environment of a high degree of undercooling at a low dosage concentration (0.1-10 wt%); can effectively delay the hydrate nucleation time and reduce the hydrate generation rate; is suitable for an oil-gas-water three-phase or oil-water or gas-water two-phase coexistence system; is applied to the inhibition of the generation of hydrates during the exploration, processing and transportation of oil and gas, without subjecting to undercooling and application constraints; and has a broad prospect of application. wherein n = 100-40000, R is *(CH2)m*, and m = 1-5.

Description

Technical field: [0001] The invention relates to the technical field of chemical industry, in particular to a novel hydrate kinetic inhibitor. Background technique: [0002] Since Hammerschmidt first discovered gas hydrates in natural gas pipelines in 1934, people began to understand and study gas hydrates. Natural gas hydrate is a non-stoichiometric clathrate complex formed by the interaction of some light gas components in natural gas, such as hydrogen, carbon dioxide, nitrogen, methane, ethane, hydrogen sulfide, etc., with water molecules under certain conditions . Later, it was found that some other light gases or liquids can also form hydrates with water under certain conditions, which are collectively called gas hydrates or clathrate hydrates. The structure of clathrate hydrate can be roughly divided into three types, namely type I, type II and type H. [0003] With the development of oil and gas fields toward the deep sea, the problem of flow security caused by hyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F126/06C08F8/34C09K8/524
Inventor 梁德青张倩史伶俐龙臻
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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