High-permeability and high-selectivity PVA/GA/CS-M<+> pervaporation film for dewatering organic solution
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
View PDF4 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
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...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
separation factor
aaaaa
aaaaa
Login to view more
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more