Composite membrane
A composite film and film layer technology, which is applied in membrane, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high energy consumption, lower oil quality, high water and energy consumption, etc.
Active Publication Date: 2013-02-27
亥姆霍兹盖斯特哈赫特材料及海岸研究中心有限公司
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] No such membrane has been provided so far in the prior art, which has a high separation capacity for low molecular weight substances when the separation limit is less than 2000 (preferably 200-1500) in oil / n-hexane mixtures, while the membrane has long-term stability
In addition, the processing method of edible oil / n-hexane mixture is very energy-intensive and must be carried out at higher temperatures, so as to reduce the quality of the oil
In addition, traditional methods necessitate the use of chemical reagents, such as sodium hydroxide lye, which in turn have to be removed from the oil in a complex manner.
So the water and energy consumption of the traditional method is higher
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] Coating solution: 50.05g Tego RC 902, 7.49g Photo compound 750; 157.55g 2-propanol.
[0039] The coating solution was applied to the PAN carrier film using dip coating. The film was then dried in an oven at 90°C. Afterwards, the film was exposed to polychromatic UV rays in a nitrogen atmosphere (2 ) cross-linking. The radiation dose is 800mJ / cm 2 .
[0040] Discs with a diameter of 7.5 cm were punched out of the membrane thus produced and placed in a microporous ultrafiltration cell. 300 ml of a solution of 10% rapeseed oil in n-hexane was injected into the tank. The separation performance of the membrane was determined at a pressure of 6 bar absolute (ie a differential pressure of about 5 bar) under constant stirring. The permeability of n-hexane through the membrane is 1.08l / m 2 h bar. Edible oil remained 90.3%.
[0041] days in solution
Permeability (l / m 2 h bar)
Retention(%)
1
1.08
90.3
60
1.00
90...
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Abstract
The invention relates to a composite membrane (5) comprising a separating active membrane layer and a carrier membrane, a method for producing such a composite membrane and the use of such a membrane. The composite film according to the invention is characterized in that the separation-active film layer contains a polymer hardened by electromagnetic radiation with a wavelength of less than 800 nm and / or by electron radiation. The method according to the invention is characterized in that a layer of a solution consisting of a polymer and an initiator substance hardenable by electromagnetic radiation with a wavelength of less than 800 nm and / or by electron radiation is applied to the carrier film and subsequently heated by electromagnetic radiation and / or by electron radiation. or electron radiation hardening. The use according to the invention is for the retention of low molecular weight substances (1, 7) from organic solutions (3).
Description
technical field [0001] The invention relates to a composite film having a separable active film layer and a carrier film. Furthermore, the invention relates to a method for producing such a composite film and to the use of such a composite film. Background technique [0002] Very energy-intensive processing steps such as distillation, filtration, mucilage removal, acid removal, deodorization, bleaching etc. are mostly used in the separation or retention of low molecular weight substances from organic solutions. For example, in the preparation of edible oils, a portion of the edible oils is obtained from oilseed fruits by extraction with hexane. During extraction with this organic solvent (n-hexane), approximately 99% of the oil contained in the fruit is eluted, but other accompanying substances are also eluted. In order to obtain a pure edible oil, it is necessary to separate the solvent and accompanying substances after the extraction by a series of further process steps....
Claims
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IPC IPC(8): B01D69/12B01D71/70C11B3/00
CPCB01D61/027B01D67/009B01D69/125B01D71/70B01D2323/34B01D69/1216
Inventor 卡特林·埃伯特约阿希姆·科尔扬·温德
Owner 亥姆霍兹盖斯特哈赫特材料及海岸研究中心有限公司