Supercharge Your Innovation With Domain-Expert AI Agents!

A kind of composite nanofiltration membrane and its preparation method and application

A composite nanofiltration membrane, a combined technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor acid resistance of nanofiltration membranes

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is in order to overcome the defect that existing nanofiltration membrane is poor in acid resistance, and provide a kind of composite nanofiltration membrane and preparation method thereof, and this composite nanofiltration membrane and the composite nanofiltration membrane prepared by this method are in water applications in the field of processing

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
  • A kind of composite nanofiltration membrane and its preparation method and application
  • A kind of composite nanofiltration membrane and its preparation method and application
  • A kind of composite nanofiltration membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The present invention also provides a kind of preparation method of composite nanofiltration membrane, and this method comprises the following steps:

[0029] (1) dissolving polymers containing hydroxyl groups and silane coupling agents containing sulfonic acid groups in solvents to prepare coating solutions;

[0030] (2) coating the coating solution on the support layer to form an initial film;

[0031] (3) immerse the support layer formed with the initial film in step (2) into a solution containing a cross-linking agent and a cross-linking catalyst to carry out a cross-linking reaction to obtain a cross-linked network structure comprising the support layer and the surface of the support layer Composite nanofiltration membrane.

[0032] According to the present invention, the present invention is not particularly limited to the amount of polymers containing hydroxyl groups, silane coupling agents containing sulfonic acid groups, and solvents in the coating solution, a...

preparation example 1

[0058] This preparation example is used to illustrate the preparation method of the silane coupling agent (SKH550) containing sulfonic acid groups.

[0059] Add 5g of KH550 to a conical flask equipped with magnetic stirring, then drop 3g of 1,4-butyl sultone under stirring, and react at room temperature for 24 hours to obtain a silane coupling agent containing a sulfonic acid group; The reaction process is as figure 1 The formation process of the silane coupling agent containing sulfonic acid groups prepared by the present invention is shown in a schematic diagram.

preparation example 2

[0061] This preparation example is used to illustrate the preparation method of the silane coupling agent (SKH540) containing sulfonic acid groups.

[0062] Add 5 g of KH540 into a conical flask equipped with magnetic stirring, then drop 2 g of 1,3-propyl sultone under stirring, and react at room temperature for 24 hours to obtain a silane coupling agent containing sulfonic acid groups.

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite nanofiltration membrane which comprises a support layer and a separate layer which are superposed together, wherein the separate layer is a composite nanofiltration membrane body adopting a cross-linked network structure formed on the surface of the support layer by dissolving one or more polymers containing hydroxyl groups and a silane coupling agent containing sulfonic groups in a solvent and carrying out a sol-gel reaction and a thermo-crosslinking reaction. The composite nanofiltration membrane is not only relatively high in desalinization ratio, water permeability (water flux), and acid resistance, but also simple in preparation method, thereby having a wide prospect in industrial application.

Description

technical field [0001] The invention relates to a composite nanofiltration membrane, a preparation method thereof, and an application of the composite nanofiltration membrane in the field of water treatment. Background technique [0002] Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. The pore size of the nanofiltration membrane is in the range of several nanometers. Or multivalent ions and organic matter with a molecular weight between 200 and 500 have a higher removal rate. It can be widely used in fresh water softening, seawater softening, drinking water purification, water quality improvement, oil-water separation, waste water treatment and recycling, as well as the classification, purification and concentration of chemical products such as dyes, antibiotics, polypeptides and polysaccharides. [0003] At present, most commercial nanofiltration membranes are polyamide structures, which have the advantages of hi...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D69/10C02F1/44
Inventor 张杨刘轶群潘国元严昊郭敏
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com