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

Purification method and purification device of nanocrystalline cellulose

A technology of nano-microcrystals and purification methods, applied in chemical instruments and methods, fiber raw material treatment, reverse osmosis, etc., can solve the problems of difficult control of derivation process, difficult dispersion, easy agglomeration, etc.

Active Publication Date: 2019-03-12
珠海市东辰制药有限公司
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because nanocrystalline cellulose is easy to agglomerate and difficult to disperse in alkali and organic solvents, it is difficult to control and collect during the derivatization process.

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
  • Purification method and purification device of nanocrystalline cellulose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 Shown, the present invention provides a kind of purifying device that realizes purifying method of the present invention, comprises water source 1, dispersion liquid collector 2 (or claims processing tank), ceramic nanofiltration membrane post 3, pump 4, compressed air source 5 ( Such as air compressor), eluate collection tank 6;

[0041] The dispersion collector 2 is connected to the front end of the ceramic membrane nanofiltration column 3 by a pump 4;

[0042] The water source 1 is connected to the dispersion collector 2;

[0043] The horizontal outlet of the ceramic nanofiltration membrane column 3 is connected with the compressed air source 5 and the eluate collection tank 6 respectively through pipelines, wherein through valves (such as the first electromagnetic valve (or claiming air intake valve 11) and the second electromagnetic valve (or claim emptying valve 12) to control the entry and discharge of compressed air, and control the effluent t...

Embodiment 2

[0051] The method for purifying nano-microcrystalline cellulose using the purification device described in Example 1 may further comprise the steps:

[0052] 1) Add the dispersion (pH2 ;The post-column pressure is 1.0~1.2kg / cm 2Add pure water intermittently to the treatment tank, the dispersion liquid flowing through the ceramic nanofiltration membrane column flows back to the treatment tank, and the eluate is collected in the eluate collection tank; the ceramic nanofiltration membrane column is a tubular ceramic Membrane; the tube wall of the tubular ceramic membrane is densely covered with micropores;

[0053] 2) When the second flow detector detects that the flow rate of the eluate is less than 0.4 L / min, close the third solenoid valve, open the first solenoid valve, and pour compressed air into the column for 3 seconds. The pressure of the compressed air is 0.1 L / min. ~1KPa, close the first solenoid valve; open the second solenoid valve, and last for 4s, discharge the com...

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 provides a purification method and a purification device of nanocrystalline cellulose. The method comprises the following steps: (1) enabling dispersion liquid containing nanocrystallinecellulose to directly flow back to a treatment tank when the dispersion liquid containing nanocrystalline cellulose flows through a ceramic nanofiltration membrane column through the action of a pump, enabling eluate containing small-molecular impurities to penetrate through a membrane and then flow into an eluate collection tank, and purified water needs to be intermittently replenished into thetreatment tank in the process; (2) switching off an eluate outflow valve and switching on an air inlet valve when the flow rate of the eluate is reduced, filling compressed air into a transverse outlet of the ceramic nanofiltration membrane column, lasting for several seconds, switching off the air inlet valve, switching on an air discharging valve for discharging the air, switching off the air discharging valve and switching on the outflow valve; and (3) repeating step (2) till the pH of the eluate is 6-7, and completing purification. Through the purification method and the purification device, the purpose of purifying the product can be achieved by separating the nanocrystalline cellulose from by-products and residual acid in the system; the continuous purification operation is capableof achieving industrialization of separation and purification of the nanocrystalline cellulose.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a method and equipment for purifying nano-microcrystalline cellulose. Background technique [0002] Nano-microcrystalline cellulose is a nano-sized cellulose product obtained from cotton, wood, straw and other types of cellulose through acid hydrolysis, enzymatic hydrolysis, alkalization catalysis or mechanical shearing. Nano-microcrystalline cellulose is used as a binder in the production process of denitration catalyst, which has extremely high requirements on ash content. Therefore, the purification process of the product is extremely important, and the purity of the product has a great impact on the subsequent process. [0003] 201710709661.5 discloses a rapid purification method for nanocellulose suspension. Ammonium bicarbonate or ammonium carbonate is added to the nanocellulose suspension to precipitate the nanocellulose, and the original impurity ions in the nanoce...

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): D21C5/00B01D61/02B01D61/08B01D61/10B01D65/02
CPCB01D61/027B01D61/08B01D61/10B01D65/02D21C5/00
Inventor 段民英杨登科
Owner 珠海市东辰制药有限公司
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