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A coating method for hollow fiber membranes used for oil and gas recovery

A fiber membrane and hollow technology, applied in the field of separation membranes, can solve the problems of low oil and gas recovery efficiency of hollow fiber membranes, and achieve the effects of good gas permeability, convenient method, and thin coating thickness

Active Publication Date: 2021-03-05
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the low efficiency of oil and gas recovery caused by the thicker hollow fiber membranes in the prior art, the purpose of the present invention is to provide a coating method for hollow fiber membranes used for oil and gas recovery, which can obtain hollow fiber membranes with thinner coating layers and facilitate oil and gas recovery. High efficiency, and the preparation method is convenient and easy to operate

Method used

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  • A coating method for hollow fiber membranes used for oil and gas recovery
  • A coating method for hollow fiber membranes used for oil and gas recovery
  • A coating method for hollow fiber membranes used for oil and gas recovery

Examples

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Effect test

Embodiment 1

[0031] A hollow fiber membrane coating method for oil and gas recovery, the hollow fiber membrane base membrane 6 is placed in a coating device with a mixed atmosphere of argon and air, and the monomer solution is coated on the hollow fiber by glow discharge low-temperature plasma polymerization On the membrane base membrane, the hollow fiber membrane base membrane is a polyvinylidene fluoride hollow fiber membrane base membrane, and the monomer solution is an aqueous solution of hexamethyldisiloxane with a mass concentration of 98%, comprising the following steps:

[0032] (1) Soak the polyvinylidene fluoride hollow fiber membrane base membrane in isopropanol for 2 hours, take it out and vacuum dry it in a vacuum drying oven for 10 minutes, then place it in a vacuum oven to evacuate;

[0033] (2) Place the treated polyvinylidene fluoride hollow fiber membrane base membrane in a cylindrical glow discharge tube, and seal the glow discharge tube with silicone rubber plugs 31 at b...

Embodiment 2

[0039] A hollow fiber membrane coating method for oil and gas recovery, the hollow fiber membrane base membrane 6 is placed in a coating device with a mixed atmosphere of argon and air, and the monomer solution is coated on the hollow fiber by glow discharge low-temperature plasma polymerization On the membrane base membrane, the hollow fiber membrane base membrane is a polyvinylidene fluoride hollow fiber membrane base membrane, and the monomer solution is an aqueous solution of hexamethyldisiloxane with a mass concentration of 98%, comprising the following steps:

[0040] (1) Soak the polyvinylidene fluoride hollow fiber membrane base membrane in isopropanol for 2.5 hours, take it out and vacuum dry it in a vacuum drying oven for 15 minutes, then place it in a vacuum oven to evacuate;

[0041] (2) Place the treated polyvinylidene fluoride hollow fiber membrane base membrane in a cylindrical glow discharge tube, and seal the glow discharge tube with silicone rubber plugs 31 at...

Embodiment 3

[0047] A hollow fiber membrane coating method for oil and gas recovery, the hollow fiber membrane base membrane 6 is placed in a coating device with a mixed atmosphere of argon and air, and the monomer solution is coated on the hollow fiber by glow discharge low-temperature plasma polymerization On the membrane base membrane, the hollow fiber membrane base membrane is a polyvinylidene fluoride hollow fiber membrane base membrane, and the monomer solution is an aqueous solution of hexamethyldisiloxane with a mass concentration of 98%, comprising the following steps:

[0048] (1) Soak the polyvinylidene fluoride hollow fiber membrane base membrane in isopropanol for 3 hours, take it out and vacuum dry it in a vacuum drying oven for 20 minutes, then place it in a vacuum oven to evacuate;

[0049] (2) Place the treated polyvinylidene fluoride hollow fiber membrane base membrane in a cylindrical glow discharge tube, and seal the glow discharge tube with silicone rubber plugs 31 at b...

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Abstract

The invention relates to the technical field of separation membranes, in particular to a coating method for hollow fiber membranes used for oil and gas recovery. The hollow fiber membrane base membrane is placed in a coating device with a mixed atmosphere of argon and air, and the low-temperature plasma is used for glow discharge. Polymerization The monomer solution is plated on the hollow fiber membrane base membrane. The hollow fiber membrane coating method of the present invention uses glow discharge low-temperature plasma polymerization to coat the polyvinylidene fluoride hollow fiber membrane base membrane, the method is convenient, the operation is simple, the coating thickness of the obtained hollow fiber membrane is relatively thin, and the oil gas recovery efficiency High, can reach more than 97%.

Description

technical field [0001] The invention relates to the technical field of separation membranes, in particular to a coating method for hollow fiber membranes used for oil and gas recovery. Background technique [0002] Oil and gas recovery refers to the collection of volatilized gasoline and oil vapor during the process of loading and unloading gasoline and refueling vehicles, so as to prevent air pollution caused by volatilization of oil and gas and eliminate potential safety hazards. At present, common methods include absorption method, condensation method, membrane separation method and adsorption method. Among them, the membrane separation method utilizes the characteristic of the special polymer membrane that has preferential permeability to hydrocarbons, so that the oil and gas molecules preferentially pass through the polymer membrane while the air components are trapped and discharged. The removal efficiency is high, and it is energy-saving and environmentally friendly. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/08
CPCB01D67/0088B01D69/08
Inventor 周婧也王北福
Owner ZHEJIANG OCEAN UNIV
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