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Novel kinetic inhibitor of hydrate

A kinetic inhibitor, hydrate inhibitor technology, applied in 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, wide applied effect

Active Publication Date: 2018-04-03
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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  • Novel kinetic inhibitor of hydrate
  • Novel kinetic inhibitor of hydrate
  • Novel kinetic inhibitor of hydrate

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

The invention discloses a novel kinetic inhibitor, with a structural formula shown as formula I (wherein n ranges from 100 to 40000, R is *(CH2) m*, and m ranges from 1 to 5) in the description, of ahydrate. The novel kinetic inhibitor is good in water solubility and high in inhibition activity, can have a good inhibition effect and has the advantages of low dosage, high efficiency, high applicability and the like, the use quantity is small, and the cost is reduced; the novel kinetic inhibitor can effectively delay nucleation of the hydrate and reduce hydrate formation rate when used in an environment at a high supercooling degree under low dose concentration (0.1wt%-10wt%), is applicable to oil-gas-water three-phase, oil-water two-phase or gas-water two-phase coexistence system, appliesto inhibition for hydrate generation in oil-gas exploitation, processing and conveying processes, is not limited by supercooling degrees and application situations and has broad application prospect.

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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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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