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

Preparation method of composite cellulose acetate membrane

A cellulose acetate membrane and cellulose acetate technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as secondary pollution, acid and alkali resistance, and limited use time, and achieve easy The effect of simple production and production and increased service life

Active Publication Date: 2015-12-16
JIANGSU LONGMEM ENVIRONMENTAL TECH CO LTD
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: In the traditional treatment method of oily sewage at present, it is necessary to add too many chemical reagents to cause secondary pollution, and when using cellulose acetate membrane to treat oily sewage, due to the The shortcoming of being not resistant to microbial corrosion and acid and alkali makes the treatment effect and the use time limited. The present invention provides a method for preparing a composite modified cellulose acetate membrane. The present invention extracts bamboo fibers and then It is mixed with glacial acetic acid and acetic anhydride. During the acetylation process, tetrakistriphenylphosphine palladium is added to it for preliminary modification, and then it is mixed with dibutyltin oxide to generate dilauric acid Dibutyltin is supported on cellulose acetate, and under the action of tetrakistriphenylphosphine palladium, it complexes with the added free nickel, and finally a composite modified acetic acid that is corrosion-resistant, acid-alkali-resistant and not easy to degrade is obtained by molding Cellulose film

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

example 1

[0019] Choose the bamboo that has grown for 3 years, cut off 30cm bamboo pieces at a distance of 10cm from the bottom of the bamboo, and dry the resulting bamboo pieces naturally. 30 mesh particles; take 300g of the above obtained particles, add deionized water to submerge the particles for 3cm, then heat to 90°C, keep the temperature for 1h, cool to room temperature, then add 20g of hemicellulase to it, stir for 30min and then filter , collect the filtrate; put the above obtained filtrate into a container, add 500mL of acetic anhydride, 700mL of glacial acetic acid and 120g of lauric acid respectively, then place the container in a water bath and heat it to a temperature of 50°C, after stirring for 40min, Add 10g of tetrakis(triphenylphosphine) palladium to it, and continue to stir for 20 minutes; after the above stirring is completed, pour the mixture in the container into a 50L reaction kettle, and add 30g of tetrakis(triphenylphosphine)nickel, 100g of dibutyl Based on tin ...

example 2

[0022] Choose the bamboo that has grown for 4 years, cut off 50cm bamboo pieces at a distance of 15cm from the bottom of the bamboo, and dry the obtained bamboo pieces naturally. When the water content is 8%, put it into a pulverizer and grind it. 40 mesh particles; take 400g of the above obtained particles, add deionized water to submerge the particles for 5cm, then heat to 100°C, keep the temperature for 2h, cool to room temperature, then add 40g of hemicellulase to it, stir for 40min and then filter , collect the filtrate; put the above obtained filtrate into a container, add 600mL of acetic anhydride, 800mL of glacial acetic acid and 130g of lauric acid respectively, then place the container in a water bath and heat it to a temperature of 60°C. After stirring for 50min, Add 15g of tetrakis(triphenylphosphine)palladium to it, and continue to stir for 30min; after the above stirring is completed, pour the mixture in the container into a 50L reaction kettle, and add 50g of tet...

example 3

[0025] Select the bamboo that has grown for 4 years, cut off 40cm bamboo pieces at a distance of 12cm from the bottom of the bamboo, and dry the resulting bamboo pieces naturally. When the water content is 7%, put it into a pulverizer and grind it. 35 mesh particles; take 350g of the above obtained particles, add deionized water to submerge the particles for 4cm, then heat to 95°C, keep the temperature for 1h, cool to room temperature, then add 30g of hemicellulase to it, stir for 35min and then filter , collect the filtrate; put the above obtained filtrate into a container, add 550mL of acetic anhydride, 750mL of glacial acetic acid and 125g of lauric acid respectively, then place the container in a water bath and heat it to a temperature of 55°C, and after stirring for 45min, Add 13g of tetrakis(triphenylphosphine)palladium to it, and continue to stir for 25min; after the above stirring is finished, pour the mixture in the container into a 50L reactor, and add 40g of tetrakis...

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
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a composite cellulose acetate membrane, and belongs to the technical field of membrane preparation. The preparation method comprises the steps of extracting bamboo fibers; mixing the bamboo fibers, glacial acetic acid and acetic anhydride to obtain a mixture I; in the acetylating process, adding tetrakis triphenylphosphine palladium into the mixture I to obtain a mixture II, carrying out primary modification on the mixture II, then mixing the modified mixture with dibutyltin oxide to obtain dibutyltin dilaurate which is loaded onto cellulose acetate; and complexing dibutyltin dilaurate and added dissociative nickel due to the effect of tetrakis triphenylphosphine palladium to finally obtain the composite cellulose acetate membrane which has a corrosion resistant effect and an acid and alkali resistant effect and is difficult to degrade. Through the powerful proving, the prepared composite cellulose acetate membrane can be used for processing oily sewage without any chemical reagent, and the oil catching rate can reach 98.8% and above.

Description

technical field [0001] The invention discloses a preparation method of a composite modified cellulose acetate membrane, which belongs to the technical field of membrane preparation. Background technique [0002] Oily sewage is a serious source of environmental pollution. The oil in the water body will be emulsified into stable emulsified oil under the action of surfactants, and the oil droplets will stick to each other, making it difficult to handle. Traditional treatment methods include flocculation, gravity separation or slag scraping, but these methods either add too many chemical reagents to cause secondary pollution, or consume too much energy and are expensive. As a new type of high-efficiency membrane separation technology, ultrafiltration does not need to add chemical reagents during the separation process, and the operation is simple, and oil recovery is relatively easy, so it has received more and more attention in the treatment of emulsified oily sewage. [0003]...

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): B01D71/16B01D67/00B01D69/12C02F1/44
Inventor 仇颖超宋国
Owner JIANGSU LONGMEM ENVIRONMENTAL TECH CO LTD
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