CN108097055A - A kind of method of coating of hollow-fibre membrane for petroleum vapor recovery - Google Patents
A kind of method of coating of hollow-fibre membrane for petroleum vapor recovery Download PDFInfo
- Publication number
- CN108097055A CN108097055A CN201711311999.1A CN201711311999A CN108097055A CN 108097055 A CN108097055 A CN 108097055A CN 201711311999 A CN201711311999 A CN 201711311999A CN 108097055 A CN108097055 A CN 108097055A
- Authority
- CN
- China
- Prior art keywords
- hollow
- membrane
- valve
- fibre membrane
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to separation technical field of membrane, more particularly to a kind of method of coating of the hollow-fibre membrane for petroleum vapor recovery, hollow-fibre membrane basement membrane is placed in argon gas and air is mixed in the plater of atmosphere, is polymerize by glow discharge low-temp plasma and monomer solution is plated on hollow-fibre membrane basement membrane.The method of coating of the hollow-fibre membrane of the present invention is polymerize using glow discharge low-temp plasma carries out coating to Pvdf Microporous Hollow Fiber Membrane basement membrane, method is convenient, easy to operate, and the coating film thickness of obtained hollow-fibre membrane is relatively thin, it is efficient to recycle oil gas, more than 97% can be reached.
Description
Technical field
The present invention relates to separation technical field of membrane, and in particular to a kind of coating side of hollow-fibre membrane for petroleum vapor recovery
Method.
Background technology
Petroleum vapor recovery refers to collect the petrol gas of volatilization in handling gasoline and to vehicle refueling process, prevents
Atmosphere pollution caused by oil gas volatilization, eliminates safe hidden trouble.At present common method have absorption process, condensation method, membrane separation process and
Absorption method etc..Wherein membrane separation process has the characteristics of preferential permeability using special polymeric membrane to hydro carbons, makes oil gas molecule preferential
Through polymeric membrane, constituent of air is trapped discharge, and removal efficiency is high, and energy conservation and environmental protection.For the macromolecule of Oil-gas Separation
Film can be divided into homogeneous membrane, anisotropic membrane and composite membrane by structure.Wherein composite membrane is that porous support layer is first made, then on its surface
One layer of ultra-thin dense layer surface is covered, wherein ultra-thin dense layer surface plays a part of to separate gas, also referred to as functional layer.According to function
The mechanism of layer separation gas understands that functional layer is thinner, and gas membrane flux is also bigger.The optimal thickness of functional layer is 0.5~1 μ
M, but the coating technique of separating layer is not also very perfect at present, and most common method is submergence czochralski method, prepared by this method
The about several microns of the thickness of the functional layer of plate membrane.Ho llow fiber membrane for gas separation is a kind of with separation mixed gas work(
The hollow fiber film of energy, because structure is special compared with plate membrane, therefore the coating of hollow-fibre membrane is more difficult, the thickness ratio of coating
The coating of plate membrane is big, and the efficiency of petroleum vapor recovery is low.
The content of the invention
For existing hollow-fibre membrane it is thicker cause petroleum vapor recovery efficiency it is low the problem of, it is an object of the invention to provide
A kind of method of coating of hollow-fibre membrane for petroleum vapor recovery, can obtain the relatively thin hollow-fibre membrane of film plating layer, and oil gas returns
Receive efficient, and preparation method is convenient easy to operate.
The present invention provides following technical solution：
Hollow-fibre membrane basement membrane is placed in argon gas and air mixes by a kind of method of coating of hollow-fibre membrane for petroleum vapor recovery
In the plater of atmosphere, it is polymerize by glow discharge low-temp plasma and monomer solution is plated on hollow-fibre membrane basement membrane,
Wherein plater includes air inlet pipe connected horizontally, inlet tube and glow tube successively：
Port of the air inlet pipe away from inlet tube is equipped with vacuum valve, and the vacuum pump connected with air inlet pipe is disposed with close to vacuum valve, into
The side surface of tracheae is set there are three opening, and two of which connects intake valve, remaining connection vacuum meter；
Inlet tube is T-shaped pipe, and the horizontal segment both ends of inlet tube are connected respectively with air inlet pipe and glow tube, and vertical section is to downward
The free port stretched is connected with holding the monomer liquid pool of monomer solution, is set in horizontal segment there are two needle-valve and is placed in vertical section two
Side also is provided with needle-valve in vertical section, and monomer liquid pool is placed in sea water bath；
The outside of glow tube winds several turn coils, and coil is connected with radio-frequency power generator.
As a kind of improvement of the method for the present invention, above-mentioned method of coating comprises the following steps：
(1) hollow-fibre membrane basement membrane is impregnated in isopropanol 2~3 it is small when, take out vacuum drying 10~20 minutes, then take out true
It is empty；
(2) hollow-fibre membrane basement membrane is placed in glow tube, at the both ends of hollow-fibre membrane, sillicon rubber blocking closes aura
Discharge tube；
(3) monomer solution is added in into monomer liquid pool, into sea water bath plus water keeps constant temperature water bath；
(4) two needle-valves of horizontal segment in inlet tube are opened under vacuum valve closing state, are led to respectively to air inlet pipe from intake valve
Enter argon gas and air, open vacuum pump and keep 0.65~2.00Pa of pressure in plater, open radio-frequency power generator and carry out
Glow discharge；
(5) needle-valve of the vertical section of inlet tube is opened under conditions of glow discharge, after pressure reaches 26.6Pa in plater
It is kept for 25~30 seconds, is then shut off the needle-valve of vertical section；
(6) radio-frequency power generator is closed, stopping is passed through argon gas and air, hollow-fibre membrane is taken out after room temperature.
As a kind of improvement of the method for the present invention, hollow-fibre membrane basement membrane is Pvdf Microporous Hollow Fiber Membrane basement membrane.
As a kind of improvement of the method for the present invention, monomer solution is water-soluble for the hexamethyldisiloxane of mass concentration 98%
Liquid.
As a kind of improvement of the method for the present invention, step (3) process is as follows：Hexamethyldisiloxane aqueous solution is added in single
Vacuum valve is closed in body fluid pond, opens the needle-valve in inlet tube, adds in ice cube to sea water bath, plating is evacuated to after 10~15 minutes
Pressure is 0.65~2.00Pa in layer device, is again turned on after being then shut off vacuum pump 10~15 minutes, so repeats to vacuumize 3
It is secondary, the needle-valve in inlet tube is closed, into sea water bath plus water keeps 70~73 DEG C of constant temperature water bath.
As a kind of improvement of the method for the present invention, the volume ratio of argon gas and nitrogen is 1 in step (4):1, radio-frequency power hair
The radio-frequency power supply frequency of raw device is 13.56MHz, and power is 800~1000W.
As a kind of improvement of the method for the present invention, the glow tube is cylinder.
The method of coating of the hollow-fibre membrane of the present invention is using glow discharge low-temp plasma polymerization to hollow-fibre membrane base
Pvdf Microporous Hollow Fiber Membrane basement membrane is placed in glow tube by film coating, is 1 to volume ratio:1 argon gas and air
Mixed gas applies frequency as 13.56MHz under 0.65~2Pa of low pressure, and the electric field that power is 800~1000W carries out aura and puts
Electricity, a small amount of free electron in mixed gas are accelerated along direction of an electric field.Since pressure is low, distance, the movement of free electron
The speed for tending to high thus obtains great kinetic energy.This high energy electron and the molecule for the monomer gas evaporated in monomer solution
Or atom can make molecule or atomic excitation, dissociation or fracture when colliding, formed various excited state molecules, atom, free radical and
Electronics, entire monomer gas are in ionized state, hollow-fibre membrane are wrapped in after gaseous dissociation, and separating layer is formed after cooling, choosing
Hexamethyldisiloxane monomer is nonflammable, belongs to half inorganic half organic structure, and gas permeability is preferable.This method is simple,
Coating is efficient, and thickness of coating is relatively thin.
Beneficial effects of the present invention are as follows：
The method of coating of the hollow-fibre membrane of the present invention is polymerize hollow to Kynoar using glow discharge low-temp plasma
Tunica fibrosa basement membrane carries out coating, and method is convenient, easy to operate, and the coating film thickness of obtained hollow-fibre membrane is relatively thin, recycles oil gas
It is efficient.
Description of the drawings
Fig. 1 is the plater used in the method for the present invention.
Fig. 2 is the configuration diagram of glow tube.
In figure：1st, air inlet pipe, 11, vacuum valve, 12, vacuum pump, 13, intake valve, 14, vacuum meter, 2, inlet tube, 21, pin
Valve, 22, monomer liquid pool, 3, glow tube, 31, sillicon rubber blocking, 4, radio-frequency power generator, 41, coil, 5, sea water bath, 6,
Hollow-fibre membrane basement membrane.
Specific embodiment
Just the specific embodiment of the present invention is described further below.
Unless otherwise instructed, the raw material employed in the present invention is commercially available or commonly used in the art, such as
Without special instruction, the method in following embodiments is the conventional method of this field.
Coating rotary device used in the method for the present invention is as shown in Fig. 1~2, including air inlet pipe 1 connected horizontally, feed liquor successively
Pipe 2 and glow tube 3, wherein port of the air inlet pipe away from inlet tube be equipped with vacuum valve 11, close to vacuum valve be disposed with into
The vacuum pump 12 of tracheae connection, the side surface of air inlet pipe are set there are three opening, and two of which connects intake valve 13, remaining connection
Vacuum meter 14；Inlet tube is T-shaped pipe, and the both ends of the horizontal segment of inlet tube are connected respectively with air inlet pipe and glow tube, vertically
The free port that extends downwardly of section is connected with holding the monomer liquid pool 22 of monomer solution, set in horizontal segment there are two needle-valve 21 and
Vertical section both sides are placed in, needle-valve also is provided in vertical section, monomer liquid pool is placed in sea water bath 5；Glow tube is cylinder,
The outside of glow tube winds several turn coils 41, and coil is connected with radio-frequency power generator 4.
Embodiment 1
Hollow-fibre membrane basement membrane 6 is placed in argon gas and air mixes by a kind of method of coating of hollow-fibre membrane for petroleum vapor recovery
In the plater for closing atmosphere, it is polymerize by glow discharge low-temp plasma and monomer solution is plated in hollow-fibre membrane basement membrane
On, hollow-fibre membrane basement membrane is Pvdf Microporous Hollow Fiber Membrane basement membrane, and monomer solution is the hexamethyl two of mass concentration 98%
Siloxanes aqueous solution, comprises the following steps：
(1) Pvdf Microporous Hollow Fiber Membrane basement membrane is impregnated in isopropanol 2 it is small when, take out the vacuum in vacuum drying chamber and do
It dry 10 minutes, is subsequently placed in vacuum tank and vacuumizes；
(2) by treated, Pvdf Microporous Hollow Fiber Membrane basement membrane is positioned in cylindrical glow tube, in hollow fibre
Glow tube is closed with sillicon rubber blocking 31 in the both ends for tieing up film；
(3) hexamethyldisiloxane aqueous solution is added in into monomer liquid pool, closes vacuum valve, opens the needle-valve in inlet tube, to
Sea water bath adds in ice cube, and it is 0.65Pa to be evacuated to pressure in plater after ten minutes, is then shut off vacuum pump after ten minutes
It is again turned on, so repeats to vacuumize 3 times, close the needle-valve in inlet tube, into sea water bath plus water keeps 70 DEG C of constant temperature water bath；
(4) two needle-valves of horizontal segment in inlet tube are opened under vacuum valve closing state, are led to respectively to air inlet pipe from intake valve
Enter argon gas and air, the volume ratio of argon gas and air is 1:1, it opens vacuum pump and keeps pressure 0.65Pa in plater, open
Radio-frequency power generator carries out glow discharge, and radio-frequency power supply frequency is 13.56MHz, power 800W；
(5) open the needle-valve of the vertical section of inlet tube under conditions of glow discharge, the monomer gas evaporated in monomer solution into
Enter to make in glow tube the pressure in plater to increase to 26.6Pa, kept for 25 seconds at this pressure, it is vertical to be then shut off
The needle-valve of section；
(6) radio-frequency power generator is closed, stopping is passed through argon gas and air, hollow-fibre membrane is taken out after room temperature.
Embodiment 2
Hollow-fibre membrane basement membrane 6 is placed in argon gas and air mixes by a kind of method of coating of hollow-fibre membrane for petroleum vapor recovery
In the plater for closing atmosphere, it is polymerize by glow discharge low-temp plasma and monomer solution is plated in hollow-fibre membrane basement membrane
On, hollow-fibre membrane basement membrane is Pvdf Microporous Hollow Fiber Membrane basement membrane, and monomer solution is the hexamethyl two of mass concentration 98%
Siloxanes aqueous solution, comprises the following steps：
(1) Pvdf Microporous Hollow Fiber Membrane basement membrane is impregnated in isopropanol 2.5 it is small when, take out the vacuum in vacuum drying chamber
It is 15 minutes dry, it is subsequently placed in vacuum tank and vacuumizes；
(2) by treated, Pvdf Microporous Hollow Fiber Membrane basement membrane is positioned in cylindrical glow tube, in hollow fibre
Glow tube is closed with sillicon rubber blocking 31 in the both ends for tieing up film；
(3) hexamethyldisiloxane aqueous solution is added in into monomer liquid pool, closes vacuum valve, opens the needle-valve in inlet tube, to
Sea water bath adds in ice cube, and it is 1.5Pa that pressure is evacuated in plater after 13 minutes, is then shut off vacuum pump after 13 minutes again
Secondary unlatching so repeats to vacuumize 3 times, closes the needle-valve in inlet tube, and into sea water bath plus water keeps 72 DEG C of constant temperature water bath；
(4) two needle-valves of horizontal segment in inlet tube are opened under vacuum valve closing state, are led to respectively to air inlet pipe from intake valve
Enter argon gas and air, the volume ratio of argon gas and air is 1:1, it opens vacuum pump and keeps pressure 1.5Pa in plater, unlatching is penetrated
Frequency power generator carries out glow discharge, and radio-frequency power supply frequency is 13.56MHz, power 900W；
(5) open the needle-valve of the vertical section of inlet tube under conditions of glow discharge, the monomer gas evaporated in monomer solution into
Enter to make in glow tube the pressure in plater to increase to 26.6Pa, kept for 28 seconds at this pressure, it is vertical to be then shut off
The needle-valve of section；
(6) radio-frequency power generator is closed, stopping is passed through argon gas and air, hollow-fibre membrane is taken out after room temperature.
Embodiment 3
Hollow-fibre membrane basement membrane 6 is placed in argon gas and air mixes by a kind of method of coating of hollow-fibre membrane for petroleum vapor recovery
In the plater for closing atmosphere, it is polymerize by glow discharge low-temp plasma and monomer solution is plated in hollow-fibre membrane basement membrane
On, hollow-fibre membrane basement membrane is Pvdf Microporous Hollow Fiber Membrane basement membrane, and monomer solution is the hexamethyl two of mass concentration 98%
Siloxanes aqueous solution, comprises the following steps：
(1) Pvdf Microporous Hollow Fiber Membrane basement membrane is impregnated in isopropanol 3 it is small when, take out the vacuum in vacuum drying chamber and do
It dry 20 minutes, is subsequently placed in vacuum tank and vacuumizes；
(2) by treated, Pvdf Microporous Hollow Fiber Membrane basement membrane is positioned in cylindrical glow tube, in hollow fibre
Glow tube is closed with sillicon rubber blocking 31 in the both ends for tieing up film；
(3) hexamethyldisiloxane aqueous solution is added in into monomer liquid pool, closes vacuum valve, opens the needle-valve in inlet tube, to
Sea water bath adds in ice cube, and it is 2.00Pa that pressure in plater is evacuated to after 15 minutes, after being then shut off vacuum pump 15 minutes
It is again turned on, so repeats to vacuumize 3 times, close the needle-valve in inlet tube, into sea water bath plus water keeps 73 DEG C of constant temperature water bath；
(4) two needle-valves of horizontal segment in inlet tube are opened under vacuum valve closing state, are led to respectively to air inlet pipe from intake valve
Enter argon gas and air, the volume ratio of argon gas and air is 1:1, it opens vacuum pump and keeps pressure 2.00Pa in plater, open
Radio-frequency power generator carries out glow discharge, and radio-frequency power supply frequency is 13.56MHz, power 1000W；
(5) open the needle-valve of the vertical section of inlet tube under conditions of glow discharge, the monomer gas evaporated in monomer solution into
Enter to make in glow tube the pressure in plater to increase to 26.6Pa, kept for 30 seconds at this pressure, it is vertical to be then shut off
The needle-valve of section；
(6) radio-frequency power generator is closed, stopping is passed through argon gas and air, hollow-fibre membrane is taken out after room temperature.
Hollow-fibre membrane recycles the performance of oil gas
Pending organic mixed vapour VOCs Primordial Qi is passed through into the film of the doughnut film preparation as obtained by Examples 1 to 3 respectively
Component is recycled, and respectively obtains purification oil gas and concentration oil gas, and oil gas and enriched oil are purified through gas chromatographic analysis
Gas each component content.Test result is as shown in table 1 below.
1 test result of table
As can be seen from the above table, the petroleum vapor recovery of the hollow-fibre membrane obtained with glow discharge low-temp plasma polymerization is imitated
Fruit is good, and petroleum vapor recovery is efficient, VOCs Primordial Qi by Examples 1 to 3 doughnut film preparation membrane module treated purification
Gas concentration drops to 4.15 × 10 respectively3mg/m3、4.30×103mg/m3With 4.26 × 103mg/m3, reach GB20950-
The secondary discharge standard of 2007 storage tank farm atmosphere pollutants emission standards, oil gas recovery rate reach more than 97%.
Claims (7)
1. the method for coating of a kind of hollow-fibre membrane for petroleum vapor recovery, which is characterized in that be placed in hollow-fibre membrane basement membrane
In argon gas and the plater of air mixing atmosphere, polymerize by glow discharge low-temp plasma monomer solution is plated in it is hollow
On tunica fibrosa basement membrane, wherein plater includes air inlet pipe connected horizontally, inlet tube and glow tube successively：
Port of the air inlet pipe away from inlet tube is equipped with vacuum valve, and the vacuum pump connected with air inlet pipe is disposed with close to vacuum valve, into
The side surface of tracheae is set there are three opening, and two of which connects intake valve, remaining connection vacuum meter；
Inlet tube is T-shaped pipe, and the horizontal segment both ends of inlet tube are connected respectively with air inlet pipe and glow tube, and vertical section is to downward
The free port stretched is connected with holding the monomer liquid pool of monomer solution, is set in horizontal segment there are two needle-valve and is placed in vertical section two
Side also is provided with needle-valve in vertical section, and monomer liquid pool is placed in sea water bath；
The outside of glow tube winds several turn coils, and coil is connected with radio-frequency power generator.
2. method of coating according to claim 1, which is characterized in that comprise the following steps：
（1）Hollow-fibre membrane basement membrane is impregnated in isopropanol 2~3 it is small when, take out vacuum drying 10~20 minutes, then take out true
It is empty；
（2）Hollow-fibre membrane basement membrane is placed in glow tube, is put close to the both ends of hollow-fibre membrane with sillicon rubber blocking closing aura
Fulgurite；
（3）Monomer solution is added in into monomer liquid pool, into sea water bath plus water keeps constant temperature water bath；
（4）Two needle-valves of horizontal segment in inlet tube are opened under vacuum valve closing state, are led to respectively to air inlet pipe from intake valve
Enter argon gas and air, open vacuum pump and keep 0.65~2.00Pa of pressure in plater, open radio-frequency power generator and carry out
Glow discharge；
（5）The needle-valve of the vertical section of inlet tube is opened under conditions of glow discharge, after pressure reaches 26.6Pa in plater
It is kept for 25~30 seconds, is then shut off the needle-valve of vertical section；
（6）Radio-frequency power generator is closed, stopping is passed through argon gas and air, hollow-fibre membrane is taken out after room temperature.
3. method of coating according to claim 1 or 2, which is characterized in that hollow-fibre membrane basement membrane is in Kynoar
Empty fiber membrane basement membrane.
4. method of coating according to claim 2, which is characterized in that monomer solution is the hexamethyl two of mass concentration 98%
Siloxanes aqueous solution.
5. method of coating according to claim 4, which is characterized in that step（3）Process is as follows：By hexamethyldisiloxane
Aqueous solution add in monomer liquid pool, close vacuum valve, open inlet tube in needle-valve, to sea water bath add in ice cube, 10~15 minutes
After to be evacuated in plater pressure be 0.65~2.00Pa, be again turned on after being then shut off vacuum pump 10~15 minutes, such as
This repeats to vacuumize 3 times, closes the needle-valve in inlet tube, and into sea water bath plus water keeps 70~73 DEG C of constant temperature water bath.
6. method of coating according to claim 2, which is characterized in that step（4）The volume ratio of middle argon gas and nitrogen is 1:
1, the radio-frequency power supply frequency of radio-frequency power generator is 13.56MHz, and power is 800~1000W.
7. method of coating according to claim 1 or 2, which is characterized in that the glow tube is cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711311999.1A CN108097055B (en) | 2017-12-11 | 2017-12-11 | Coating method of hollow fiber membrane for oil gas recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711311999.1A CN108097055B (en) | 2017-12-11 | 2017-12-11 | Coating method of hollow fiber membrane for oil gas recovery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108097055A true CN108097055A (en) | 2018-06-01 |
| CN108097055B CN108097055B (en) | 2021-03-05 |
Family
ID=62208386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711311999.1A Active CN108097055B (en) | 2017-12-11 | 2017-12-11 | Coating method of hollow fiber membrane for oil gas recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108097055B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011063940A1 (en) * | 2009-11-27 | 2011-06-03 | Gambro Lundia Ab | Hollow fibers with selective, plasma induced modification of lumen surface and continuous process for their production |
| CN103285751A (en) * | 2013-06-28 | 2013-09-11 | 清华大学 | PDMS (Polydimethylsiloxane)-PVDF (Polyvinylidene Fluoride) composite membrane for separating organic vapor and modification-preparation method thereof |
| CN106256417A (en) * | 2015-06-18 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of preparation method of high-performance organic gas separation film |
| CN106906456A (en) * | 2017-01-23 | 2017-06-30 | 无锡荣坚五金工具有限公司 | A kind of preparation method of the controllable coating of the degree of cross linking |
-
2017
- 2017-12-11 CN CN201711311999.1A patent/CN108097055B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011063940A1 (en) * | 2009-11-27 | 2011-06-03 | Gambro Lundia Ab | Hollow fibers with selective, plasma induced modification of lumen surface and continuous process for their production |
| CN103285751A (en) * | 2013-06-28 | 2013-09-11 | 清华大学 | PDMS (Polydimethylsiloxane)-PVDF (Polyvinylidene Fluoride) composite membrane for separating organic vapor and modification-preparation method thereof |
| CN106256417A (en) * | 2015-06-18 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of preparation method of high-performance organic gas separation film |
| CN106906456A (en) * | 2017-01-23 | 2017-06-30 | 无锡荣坚五金工具有限公司 | A kind of preparation method of the controllable coating of the degree of cross linking |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108097055B (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108704491B (en) | Method for preparing layered metal organic framework film by vapor gel method | |
| CN106621864A (en) | MOFs (metal-organic frameworks)-cross-linked polyethylene glycol diacrylate mixed substrate membrane, preparation and application | |
| CN113457464A (en) | MXene film preparation method based on co-intercalation accurate interlayer spacing regulation | |
| CN108097055A (en) | A kind of method of coating of hollow-fibre membrane for petroleum vapor recovery | |
| CN103157345B (en) | Oil circulation gas purification apparatus based on molecule intermiscibility and purification method | |
| CN201517039U (en) | Heat pump type sea water desalination device | |
| CN108579468B (en) | MOP/hydroxide ceramic composite membrane, preparation method and application | |
| CN105617878B (en) | The method that atmospheric low-temperature plasma technology prepares composite membrane | |
| CN103894150B (en) | A kind of preparation method of the carbon membrane for water-oil separating | |
| CN112898628B (en) | Leaf-like porous membrane composite PPy/PVA sponge and preparation method and application thereof | |
| CN107321196B (en) | Preparation method and application of protonatable polyelectrolyte nano particle/NaA molecular sieve composite membrane | |
| CN114713046B (en) | Packaged ionic liquid supported liquid film and preparation method thereof | |
| CN115121127B (en) | Aerogel-limited solid-liquid composite membrane for extracting uranium from seawater as well as preparation method and application thereof | |
| CN105688685A (en) | Method for preparing composite membrane through barometric pressure air plasma technology | |
| Du et al. | Metal-covalent organic framework nanosheets engineered facilitated transport membranes for toluene/n-heptane separation | |
| CN116550156B (en) | Modification method of air separation membrane | |
| CN106731867A (en) | The preparation method and preparation facilities of a kind of efficient anti-pollution reverse osmosis membrane | |
| CN208076262U (en) | A kind of supercritical CO 2 rock core oil washing instrument | |
| CN1330040A (en) | Centrifugal isolator for efficient seawater desalination | |
| CN115569819A (en) | Underwater super-oleophylic surface functional coating and preparation method and application thereof | |
| CN116617877A (en) | Deposition of NH 2 MIL-88B (Fe) grafted PFHx hydrophilic oleophobic modified PVDF membrane and preparation method thereof | |
| Uragami et al. | Concentration of bioethanol and dehydration of organic solvents by porous membranes | |
| CN117887440A (en) | CO suitable for shale oil development in micro-nano pores 2 Composite system | |
| CN116173745A (en) | Preparation method of high-performance MXene@PEI/IL film | |
| Zhao et al. | Horizontal Restacking Control of Covalent Organic Framework Nanosheets for Ultrathin Gas Separation Membranes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |