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Composite type low-dose hydrate inhibitor and preparation method thereof

A hydrate inhibitor and composite technology, which can be used in mechanical equipment, gas/liquid distribution and storage, pipeline systems, etc., and can solve the problems of high cost, large loss, and large consumption.

Active Publication Date: 2016-02-10
北京中清绿智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new kinetic hydrate inhibitor with less dosage, high efficiency and environmental friendliness, aiming at the defects of large dosage, high cost, high toxicity, and large loss of existing traditional hydrate inhibitors. and its synthesis method

Method used

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  • Composite type low-dose hydrate inhibitor and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare an aqueous solution of N-vinylpyrrolidone and methacrylic acid copolymer with a concentration of 900ppm. The temperature is 2°C, the pressure is 6MPa, the stirring speed is 600r / min, the experimental gas is pure methane, pure methane and N-vinylpyrrolidone and The gas-liquid ratio of the methacrylic acid copolymer aqueous solution was 2:1, hydrates began to form after 180 minutes, and hydrates were completely formed after 300 minutes.

Embodiment 2

[0036] Prepare an aqueous solution of N-vinylpyrrolidone and methacrylic acid copolymer with a concentration of 3000ppm, at a temperature of 2°C, a pressure of 6MPa, a stirring speed of 600r / min, the experimental gas is pure methane, pure methane and N-vinylpyrrolidone and The gas-liquid ratio of the methacrylic acid copolymer aqueous solution was 2:1, and the hydrates began to form after 900 minutes, and the hydrates were completely formed after 1300 minutes.

Embodiment 3

[0038] Prepare an aqueous solution of N-vinylpyrrolidone and methacrylic acid copolymer with a concentration of 900ppm. The temperature is 4°C, the pressure is 25MPa, the stirring speed is 600r / min, the experimental gas is pure methane, pure methane and N-vinylpyrrolidone and The gas-liquid ratio of the methacrylic acid copolymer aqueous solution was 2:1, hydrates began to form after 150 minutes, and hydrates were completely formed after 410 minutes.

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Abstract

The invention relates to natural gas hydrate, in particular to a composite type low-dose hydrate inhibitor and a preparation method thereof, and belongs to the technical field of oil-gas storage and transportation engineering. The composite type low-dose hydrate inhibitor is used for preventing and inhibiting generation of hydrate. N-vinyl pyrrolidone and methacrylic acid or acrylamide serve as polymeric monomers, the N-vinyl pyrrolidone and the methacrylic acid or the acrylamide are together dissolved in absolute ethyl alcohol, hydrogen peroxide or azodiisobutyronitrile serves as an initiator, a free radical solution polymerization reaction is conducted in solvent, and the composite type low-dose hydrate inhibitor is obtained. The hydrate inhibitor is low in additive amount, good in inhibition performance and capable of effectively slowing down the nucleation rate of the hydrate. According to the composite type low-dose hydrate inhibitor and the preparation method thereof, the synthetic method is simple and convenient, the energy consumption is low, and inhibitor products can be directly applied to petroleum and gas industries to prevent hydrate plugging.

Description

technical field [0001] The invention relates to natural gas hydrate, in particular to a composite low-dose hydrate inhibitor and a preparation method thereof, belonging to the technical field of oil and gas storage and transportation engineering, and used for preventing and inhibiting the formation of hydrate. Background technique [0002] Natural gas hydrate is an ice-snow solid formed after a certain reaction time between hydrocarbon molecules such as methane and ethane and liquid water at a certain temperature and pressure; environment, low-boiling hydrocarbon molecules in oil and gas such as methane, ethane, propane, carbon dioxide, and hydrogen sulfide can easily form hydrates with liquid water. Hydrates are formed by water molecules connected by hydrogen bonds to form a cage structure. Small gas molecules pass through The van der Waals force is surrounded in the lattice, and this clathrate hydrate gathers together to form a block, and even blockage. , it is very easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/10C08F220/06C08F220/56F17D1/16F17D1/02
CPCY02E60/34
Inventor 周诗岽朱云华卢国维王树立李工
Owner 北京中清绿智科技有限公司