Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method for spiral-wound ultrafiltration membrane with low molecular weight cut off as well as product thereof

An ultrafiltration membrane, molecular weight technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effect of convenient process control, simple molding procedure and good simplicity

Active Publication Date: 2014-05-28
SHANDONG ZHAOJIN MOTIAN
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultrafiltration membranes produced by these various explorations and researches are plate membranes, the membrane manufacturing process is complicated, the process control requires precision, the membrane manufacturing cost is high, and the industrial membrane module equipment is expensive and occupies a large area, which is not conducive to industrial application.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 25 parts of polysulfone (polymer), 3 parts of additives (among them, additives include 1 part of anhydrous lithium chloride and 2 parts of propanol), and 79 parts of dimethylacetamide (solvent) at 80 ° C Uniformly mixed and dissolved under the temperature conditions, and the film-making liquid was obtained after filtering and defoaming in a conventional way.

[0030] Install the polyester non-woven fabric as the supporting layer on the film scraping machine, adjust the thickness of the scraper and the cloth speed of the linear speed controller, and pour the pre-prepared film-making solution into the film-making solution storage tank slowly and steadily. Start the scraping machine, and the film-making solution is coated and scraped on the polyester non-woven fabric. After an air exposure distance of 15cm, it is immersed in a constant temperature coagulation bath at 6°C, and then fully rinsed through the rinsing tank to obtain ultrafiltration with a low molecular weigh...

Embodiment 2

[0034] 20 parts of polyethersulfone (polymer), 4 parts of additives (among them, additives include 2 parts of phosphoric acid and 2 parts of propanol), 76 parts of dimethylformamide (solvent) at a temperature of 70 ° C Mix and dissolve evenly under the environment, filter and defoam in a conventional way to obtain the film-making liquid.

[0035] Install the polyester non-woven fabric as the supporting layer on the film scraping machine, adjust the thickness of the scraper and the cloth speed of the linear speed controller, and pour the pre-prepared film-making solution into the film-making solution storage tank slowly and steadily. Start the scraping machine, and the film-making solution is applied and scraped on the polyester non-woven fabric. After an air exposure distance of 10cm, it is immersed in a constant temperature coagulation bath at 8°C, and then fully rinsed through the rinsing tank to obtain ultrafiltration with a low molecular weight cut-off. Diaphragm.

[0036...

Embodiment 3

[0039] 16 parts of polyvinylidene fluoride (polymer), 8 parts of additives (among them, additives include 3 parts of polyvinylpyrrolidone and 5 parts of acetone), 76 parts of N-methylpyrrolidone (solvent) at 75 ° C Mix and dissolve evenly under temperature conditions, filter and defoam in a conventional way to obtain a film-forming solution.

[0040] Install the polyester non-woven fabric as the supporting layer on the film scraping machine, adjust the thickness of the scraper and the cloth speed of the linear speed controller, and pour the pre-prepared film-making solution into the film-making solution storage tank slowly and steadily. Start the scraping machine, and the film-making solution is applied and scraped on the polyester non-woven fabric. After an air exposure distance of 10cm, it is immersed in a constant temperature coagulation bath at 8°C, and then fully rinsed through the rinsing tank to obtain ultrafiltration with a low molecular weight cut-off. Diaphragm.

[...

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

No PUM Login to View More

Abstract

The invention relates to an ultrafiltration membrane and a preparation technology thereof, in particular to a preparation method for a spiral-wound ultrafiltration membrane with low molecular weight cut off as well as a product thereof. The preparation method for the spiral-wound ultrafiltration membrane with low molecular weight cut off comprises specific steps as follows: preparing a membrane preparing liquid; preparing a membrane piece; and preparing the spiral-wound ultrafiltration membrane. The molecular weight cut off of the prepared spiral-wound ultrafiltration membrane with low molecular weight cut off is 1,000-5,000, and the water flux is 20-110 liter / square meter / hour / bar. The preparation method for the spiral-wound ultrafiltration membrane with low molecular weight cut off is simple in technology and saving in procedure, the spiral-wound ultrafiltration membrane with low molecular weight cut off can be prepared through three steps, further, the membrane preparing procedure is simple, the process control is quite convenient, various indexes can be better balanced in a production process, and widespread industrial use is facilitated. Compared with the conventional plate and frame membrane, tubular membrane, hollow fiber membrane, spiral-wound membrane and the like, the spiral-wound ultrafiltration membrane which has low molecular weight cut off and is prepared with the method has lower molecular weight cut off and water flux.

Description

[0001] technical field [0002] The invention relates to a method for preparing a roll-type ultrafiltration membrane with a low molecular weight cut-off and a product thereof, and belongs to the technical field of ultrafiltration membrane preparation methods. Background technique [0003] The membrane modules used in industry mainly include plate and frame membrane modules, tubular membrane modules, hollow fiber membrane modules and roll membrane modules. The plate-and-frame membrane module is easy to clean and assemble, and the processing is relatively easy. The area of ​​the flow channel is relatively large, and the phenomenon of flow channel blockage is not easy to occur. However, the sealing processing requirements for the boundaries and devices are relatively high, and the one-time passage of the material liquid is small, and multiple cycles are required. The tubular membrane module can well control the concentration polarization phenomenon, and the feed liquid genera...

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 Applications(China)
IPC IPC(8): B01D69/00B01D71/68B01D71/34B01D67/00
Inventor 王乐译赵岳轩张伟政王兵厚徐志成王新艳
Owner SHANDONG ZHAOJIN MOTIAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com