CN104474909A - Preparation method of reverse osmosis membrane - Google Patents
Preparation method of reverse osmosis membrane Download PDFInfo
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- CN104474909A CN104474909A CN201410712396.2A CN201410712396A CN104474909A CN 104474909 A CN104474909 A CN 104474909A CN 201410712396 A CN201410712396 A CN 201410712396A CN 104474909 A CN104474909 A CN 104474909A
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- phase solution
- reverse osmosis
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- osmosis membrane
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Abstract
The invention provides a preparation method of a reverse osmosis membrane, which comprises the following steps: preparing a 0.1-10 wt% polyfunctional aromatic amine solution, and stirring uniformly to obtain a water phase solution; preparing a 0.01-10 wt% polyfunctional acyl chloride organic phase solution to obtain an oil phase solution; fixing an ultrafiltration membrane with a support layer to a rotary bearing, and starting the rotating shaft to drive the ultrafiltration membrane to move; sequentially spraying the water phase solution and oil phase solution onto the ultrafiltration membrane surface by a film coating device, and waiting until the organic solvents on the membrane surface are completely volatilized; and sending the dry film of which the organic solvents are completely volatilized into an 80-100 DEG C blast drying oven, and drying until the organic phase solvents are volatilized, thereby obtaining the reverse osmosis membrane. The preparation method obviously lowers the recovery cost of waste liquor on the premise of stabilizing the membrane properties.
Description
Technical field
The present invention relates to reverse osmosis membrane technology, be specifically related to a kind of preparation method of reverse osmosis membrane.
Background technology
What reverse osmosis membrane generally adopted is prepared by interface polymerization reaction by the submergence mode of aqueous phase solution and organic phase solution, immerse in aqueous phase solution and organic phase solution groove by the rotation drive film of ultrafiltration membranes along with cylinder on stainless steel drum, the method mainly utilize ultrafiltration membranes on the subsidiary capability control film of the aqueous solution and organic solvent concentration with two-phase monomer and amount, but because the aqueous phase of real reaction and the amount of organic phase monomer are very micro-, therefore this aqueous phase and organic phase solution are excessive far away to interface polymerization reaction on milipore filter, the aqueous solution can be produced in manufacture process, the waste liquid of organic solution and constantly generate some magazines and accessory substance, cause the environmental pollution that cost recovery is high and possible, and aqueous phase solution may enter into the back side of milipore filter, cause film surface band water yield difference thus cause the difference of interface polymerization reaction film properties.
Summary of the invention
In view of this, the invention provides a kind of preparation method of reverse osmosis membrane, be intended to the treatment cost of waste liquor reduced in the preparation process of reverse osmosis membrane.
The technical solution used in the present invention is specially:
A preparation method for reverse osmosis membrane, comprises following steps:
The multifunctional aromatic amine solution of configuration 0.1-10wt%, stirring, is aqueous phase solution;
The organic phase solution of the polyfunctional group acyl chlorides of preparation 0.01-10wt% is oil-phase solution;
The ultrafiltration diaphragm with supporting layer is fixed on rolling bearing, and rotating shaft is started and is namely driven ultrafiltration motion of membrane;
First aqueous phase solution is sprayed to ultrafiltration membrane surface by coating device, and by regulating the size of the flow-control spraying of booster pump, the aqueous phase solution thickness on ensuring coverage film surface is 0.1-1mm, the globule on film surface is blown off with air knife; Then oil-phase solution is sprayed to ultrafiltration membrane surface, by regulating the size of the flow-control spraying of booster pump, the oil-phase solution thickness on ensuring coverage film surface is 0.1-1mm, treats that the organic solvent on film surface volatilizees completely;
The dry film that organic solvent volatilizees completely enters in the convection oven of 80-100 DEG C and carries out drying, treats that organic phase solvent volatilization is dry, i.e. obtained reverse osmosis membrane.
In the preparation method of above-mentioned reverse osmosis membrane, coating device is connected with the container storing aqueous phase solution or oil-phase solution by booster pump, by shower nozzle, aqueous phase solution or oil-phase solution is coated on ultrafiltration diaphragm.
In the preparation method of above-mentioned reverse osmosis membrane, device for coating adopts different shower nozzles respectively aqueous phase solution and oil-phase solution to be coated on ultrafiltration diaphragm.
In the preparation method of above-mentioned reverse osmosis membrane, the flow of booster pump is 1.5-50m
3/ h, lift is 10-125m.
In the preparation method of above-mentioned reverse osmosis membrane, described multifunctional aromatic amine is the compound containing at least two reactive amino.
In the preparation method of above-mentioned reverse osmosis membrane, described polyfunctional group acyl chlorides is the multi-functional acetyl halide compound at least with two reactive acid halide group.
The beneficial effect that the present invention produces is:
Utilize the ink-jet principle with printer, with booster pump, aqueous phase solution and organic phase solution are sprayed to ultrafiltration membrane surface in vaporific mode, reverse osmosis membrane is prepared in interfacial polymerization.By adopting spraying method, make the freshness of aqueous phase solution and organic phase solution in course of reaction, namely the two phase liquid carrying out interface polymerization reaction is all the solution of stable and uniform, ensure that the stability of whole reaction and the stability of final reverse osmosis membrane performance.Under the prerequisite of stabilising membrane performance, reduce the cost recovery of waste liquid.
Detailed description of the invention
Below in conjunction with embodiment, technical scheme of the present invention is described in further detail.When considering in conjunction with the embodiments, more completely the present invention can be understood better.Embodiment described herein is used to provide a further understanding of the present invention, does not form inappropriate limitation of the present invention.
A kind of preparation method of reverse osmosis membrane, for the aqueous solution of 2.5wt% m-phenylene diamine (MPD) as aqueous phase solution, the Isopar G solution of 0.1wt% pyromellitic trimethylsilyl chloride as oil-phase solution, the painting film parameters of device for coating is: film speed 3.5m/s, booster pump flow velocity 20m
3/ h, film distance 300m
Produce 300m
2during diaphragm, original dip-coating and spraying method of the present invention institute's consumable material and film properties contrast as shown in table 1:
The table 1 diaphragm performance test table of comparisons
As mentioned above; embodiments of the invention are explained; obviously; as long as do not depart from fact inventive point of the present invention and effect, will be readily apparent to persons skilled in the art distortion; adopt other supercharging modes to realize the mode of spraying aqueous phase and organic phase solution, be also all included within protection scope of the present invention.
Claims (6)
1. a preparation method for reverse osmosis membrane, is characterized in that, comprises following steps:
The multifunctional aromatic amine solution of configuration 0.1-10wt%, stirring, is aqueous phase solution;
The organic phase solution of the polyfunctional group acyl chlorides of preparation 0.01-10wt% is oil-phase solution;
The ultrafiltration diaphragm with supporting layer is fixed on rolling bearing, and rotating shaft is started and is namely driven ultrafiltration motion of membrane;
First aqueous phase solution is sprayed to ultrafiltration membrane surface by coating device, and by regulating the size of the flow-control spraying of booster pump, the aqueous phase solution thickness on ensuring coverage film surface is 0.1-1mm, the globule on film surface is blown off with air knife; Then oil-phase solution is sprayed to ultrafiltration membrane surface, by regulating the size of the flow-control spraying of booster pump, the oil-phase solution thickness on ensuring coverage film surface is 0.1-1mm, treats that the organic solvent on film surface volatilizees completely;
The dry film that organic solvent volatilizees completely enters in the convection oven of 80-100 DEG C and carries out drying, treats that organic phase solvent volatilization is dry, i.e. obtained reverse osmosis membrane.
2. the preparation method of reverse osmosis membrane according to claim 1, is characterized in that, coating device is connected with the container storing aqueous phase solution or oil-phase solution by booster pump, by shower nozzle, aqueous phase solution or oil-phase solution is coated on ultrafiltration diaphragm.
3. the preparation method of reverse osmosis membrane according to claim 1, is characterized in that, device for coating adopts different shower nozzles respectively aqueous phase solution and oil-phase solution to be coated on ultrafiltration diaphragm.
4. the preparation method of reverse osmosis membrane according to claim 1, is characterized in that, the flow of booster pump is 1.5-50m
3/ h, lift is 10-125m.
5. the preparation method of reverse osmosis membrane according to claim 1, is characterized in that, described multifunctional aromatic amine is the compound containing at least two reactive amino.
6. the preparation method of reverse osmosis membrane according to claim 1, is characterized in that, described polyfunctional group acyl chlorides is the multi-functional acetyl halide compound at least with two reactive acid halide group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712396.2A CN104474909A (en) | 2014-11-28 | 2014-11-28 | Preparation method of reverse osmosis membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410712396.2A CN104474909A (en) | 2014-11-28 | 2014-11-28 | Preparation method of reverse osmosis membrane |
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| CN104474909A true CN104474909A (en) | 2015-04-01 |
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| CN201410712396.2A Pending CN104474909A (en) | 2014-11-28 | 2014-11-28 | Preparation method of reverse osmosis membrane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097071A (en) * | 2017-11-22 | 2018-06-01 | 北京新源国能科技集团股份有限公司 | A kind of preparation method of improved polyvinylidene fluoride NF membrane |
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| US4661254A (en) * | 1985-05-23 | 1987-04-28 | Uop Inc. | Chlorine-resistant semipermeable membranes |
| JPH0957079A (en) * | 1995-08-25 | 1997-03-04 | Kubota Corp | Production of inorganic separation membrane utilizing thermal spraying |
| CN1441693A (en) * | 2000-04-17 | 2003-09-10 | 陶氏环球技术公司 | Composite membrane and method for making same |
| CN101460237A (en) * | 2006-05-12 | 2009-06-17 | 陶氏环球技术公司 | Modified membrane |
| CN102512980A (en) * | 2011-12-23 | 2012-06-27 | 北京工业大学 | Automatic assembling device and method of multilayer composite separation membrane |
| CN102698613A (en) * | 2012-05-24 | 2012-10-03 | 北京工业大学 | Automatic assembling device and method for tubular multilayer composite separation membrane |
| CN103846018A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院成都有机化学有限公司 | Method for synthesizing NaA molecular sieve membrane by spraying crystal seeds |
-
2014
- 2014-11-28 CN CN201410712396.2A patent/CN104474909A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4661254A (en) * | 1985-05-23 | 1987-04-28 | Uop Inc. | Chlorine-resistant semipermeable membranes |
| JPH0957079A (en) * | 1995-08-25 | 1997-03-04 | Kubota Corp | Production of inorganic separation membrane utilizing thermal spraying |
| CN1441693A (en) * | 2000-04-17 | 2003-09-10 | 陶氏环球技术公司 | Composite membrane and method for making same |
| CN101460237A (en) * | 2006-05-12 | 2009-06-17 | 陶氏环球技术公司 | Modified membrane |
| CN102512980A (en) * | 2011-12-23 | 2012-06-27 | 北京工业大学 | Automatic assembling device and method of multilayer composite separation membrane |
| CN102698613A (en) * | 2012-05-24 | 2012-10-03 | 北京工业大学 | Automatic assembling device and method for tubular multilayer composite separation membrane |
| CN103846018A (en) * | 2012-12-06 | 2014-06-11 | 中国科学院成都有机化学有限公司 | Method for synthesizing NaA molecular sieve membrane by spraying crystal seeds |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108097071A (en) * | 2017-11-22 | 2018-06-01 | 北京新源国能科技集团股份有限公司 | A kind of preparation method of improved polyvinylidene fluoride NF membrane |
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Application publication date: 20150401 |