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High-permeability and high-selectivity PVA/GA/CS-M<+> pervaporation film for dewatering organic solution

A pervaporation and organic solution technology, applied in the field of high permeation and high selectivity pervaporation thin films and their preparation, can solve the problems of consuming hydrophilic groups of polymer chains, consuming hydroxyl groups, etc., to promote permeation efficiency, improved compatibility, high mechanical strength

Inactive Publication Date: 2019-05-14
蔡燕铃 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the cross-linking agent can make the structure of the membrane more stable, it will consume the hydrophilic groups of the polymer chain. Negative impact due to the formation of crosslinkers that consume hydroxyl groups in the PVA polymer

Method used

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  • High-permeability and high-selectivity PVA/GA/CS-M&lt;+&gt; pervaporation film for dewatering organic solution
  • High-permeability and high-selectivity PVA/GA/CS-M&lt;+&gt; pervaporation film for dewatering organic solution
  • High-permeability and high-selectivity PVA/GA/CS-M&lt;+&gt; pervaporation film for dewatering organic solution

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0046] The invention provides a pervaporation film with high permeability and high selectivity for dehydration of organic solutions and a preparation method thereof, the method comprising:

[0047] Preparation materials: polyvinyl alcohol (PVA) (Mw~125,000), chitosan (CS) (Mw~30,000), 25wt% glutaraldehyde (GA), and 99wt% isopropanol (IPA), ethanol ( EtOH) and acetone (Acetone). All chemical reagents were of reagent grade and no further purification was required.

[0048] Preparation process: Dissolve 5g of CS in 45g of deionized water, stir at room temperature for 7 to 10 hours, especially 8 hours, and then add different weights of silver, copper, and iron ions, that is, nitrates, to the front In a solution, li...

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Abstract

The invention relates to a high-permeability and high-selectivity PVA / GA / CS-M<+> pervaporation film for dewatering an organic solution and a preparation method of the high-permeability and high-selectivity PVA / GA / CS-M<+> pervaporation film. The preparation method includes: heavy metal ions (M<+>) such as Ag<+>, Cu<2+> and Fe<3+> are used to chelate with CS (chitosan) to serve as the precursor, mixing the precursor with PVA (polyvinyl alcohol), and adding GA (glutaraldehyde) to serve as the crosslinking agent to obtain the high-permeability and high-selectivity PVA / GA / CS-M<+> pervaporation filmwhich is high in mechanical strength and heat stability and excellent in permeability and selectivity to the organic solution.

Description

technical field [0001] The invention relates to a pervaporation membrane, in particular to a permeation evaporation membrane with high permeability and high selectivity for dehydration of organic solutions and a preparation method thereof. Background technique [0002] Isopropanol (IPA) can be used to produce raw materials such as acetone, isopropyl ester, and isopropylamine. It is also widely used in pharmaceuticals, pesticides, cosmetics, plastics, spices, coatings, etc., and as a cleaning agent, oil, and gum in semiconductors. , waxes and cosmetics and other solvents. Ethanol (EtOH) can be used to manufacture acetic acid, acetaldehyde, ether, ethyl acetate, ethylamine, etc. It is also a raw material for the preparation of medicines, cosmetics, dyes, paints, detergents, beverages, flavors, and vehicle fuels. Acetone (Acetone) is not only used in the manufacture of bisphenol A, methyl methacrylate, acetone cyanohydrin, methyl isobutyl ketone and other products, but also ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D69/02B01D67/00B01D61/36
Inventor 蔡燕铃郑博谥
Owner 蔡燕铃
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