Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyphenol modified chitosan adsorbent, preparation method thereof and application of polyphenol modified chitosan adsorbent to germanium recovery

A chitosan and adsorbent technology is applied to a polyphenol-modified chitosan adsorbent, a preparation method thereof, and an application field in germanium recovery, and achieves the effects of simple and fast synthesis process, safe synthesis process and low price

Inactive Publication Date: 2019-10-25
LIAONING UNIVERSITY
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to modify chitosan to make it have the ability to adsorb germanium, there are no related articles reporting it

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
  • Polyphenol modified chitosan adsorbent, preparation method thereof and application of polyphenol modified chitosan adsorbent to germanium recovery
  • Polyphenol modified chitosan adsorbent, preparation method thereof and application of polyphenol modified chitosan adsorbent to germanium recovery
  • Polyphenol modified chitosan adsorbent, preparation method thereof and application of polyphenol modified chitosan adsorbent to germanium recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of embodiment 1 polyphenol modified chitosan adsorbent

[0034] (1) Preparation of 2,3,4-trihydroxybenzaldehyde modified chitosan adsorbent THB-CS

[0035] 1. Preparation of chitin: After cleaning and drying the crab shell, weigh 5g, add 75mL of 2%-6% hydrochloric acid solution to soak, and keep stirring to dissolve the inorganic salt in the shell and soften it. After soaking for 10-15 hours , to remove inorganic salts. Then wash the crab shells until neutral, add 75mL of 8% to 10% sodium hydroxide solution, and heat to 90°C for 4h. Wash the crab shells after alkali treatment to neutrality, add 50mL of 1% KMnO 4 and NaHSO 3 The solution was rinsed separately, washed and dried to obtain a white solid, chitin.

[0036] 2. Preparation of chitosan: Take 5 g of dry chitin, add 50 mL of 40% to 50% sodium hydroxide solution, and react at 100° C. for 7 h. Finally, a white chitosan solid was obtained, abbreviated as CS.

[0037] 3. Weigh 0.25g 2,3,4-trihydr...

Embodiment 2

[0049] The adsorption effect of embodiment 2 polyphenol modified chitosan to germanium under different acidity

[0050] Get 10mg of polyphenol modified chitosan THB-CS, HBD-CS, PTD-CS prepared in Example 1 and add pH 1~6, 20mg L -1 germanium solution, and then put it into a shaking box with a rotating speed of 180r / min and a temperature of 303K for 24h, filter, take the filtrate and stock solution to measure its concentration, and calculate the adsorption rate. The result is as Figure 4 shown.

[0051] Depend on Figure 4 It can be seen that the adsorption performance of chitosan adsorbent THB-CS modified by 2,3,4 trihydroxybenzaldehyde is significantly higher than that modified by 3,4-dihydroxybenzaldehyde and 4-hydroxybenzaldehyde. The adsorbents HBD-CS and PTD-CS, because the number of phenolic hydroxyl groups in THB-CS is relatively large, and the structure is in the ortho position, so it is easier to form complexes with Ge(IV), although the ortho-diphenol structure T...

Embodiment 3

[0054] Example 3 Polyphenol-modified chitosan adsorbent to the separation effect of germanium in the presence of other rare earth ions

[0055] Weigh 10mg 2,3,4-trihydroxybenzaldehyde modified chitosan adsorbent THB-CS, add 10mL concentration to 20mg L -1 Ge(IV), Mn(II), Zn(II), Ni(II), Pb(II), As(III), Co(II), Fe(III) solution, the pH of the solution is 0~9, in Shake in a shaking box at 30°C and 180r / min for 24h.

[0056] The result is as Figure 6 , in the presence of other impurity ions, the adsorption rate of THB-CS adsorbent to Ge(IV) in the range of pH = 1-3 is above 80%. It can be seen that the pH is in the range of 0-2, and As(III ), Ni(II), Zn(II), and Mn(II) have very low adsorption rates, and in the range of pH 1 to 9, the adsorption rates for arsenic are very low, which shows that THB-CS adsorbent can work in many In the presence of such ions, it can selectively adsorb germanium ions.

[0057] In order to verify the practical applicability of THB-CS. Select th...

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 belongs to the technical field of rare earth recovery and particularly relates to a polyphenol modified chitosan adsorbent, a preparation method thereof and application of the polyphenolmodified chitosan adsorbent to germanium recovery. The preparation method comprises the following steps that crab shells are cleaned and dried, then a hydrochloric acid solution is added for soakingthe crab shells, continuous stirring is conducted, after being soaked for 10-15 h, the crab shells are washed to be neutral, a sodium hydroxide solution is added, heating is conducted to 80-100 DEG Cfor reaction for 2-6 h, the crab shells are washed to be neutral, 1% of a KMnO4 solution and 1% of a NaHSO3 solution are added for rinsing, and drying is conducted to obtain a white solid, namely chitin; the dried chitin is taken and added into the sodium hydroxide solution, reaction is conducted at 80-120 DEG C for 5-10 h, and thus a white chitosan solid is obtained; and polyphenol and the chitosan solid are placed in a three-opening bottle, methyl alcohol is added, continuous stirring is conducted till the methyl alcohol is dissolved, stirring is conducted at 20-50 DEG C for 12-24 h, washingand drying are conducted, and then the polyphenol modified chitosan adsorbent is obtained. The prepared polyphenol modified chitosan adsorbent can effectively adsorb germanium ions, energy consumption is avoided, energy saving and environmental protection are realized, and the adsorbent is convenient to prepare and rich in source and has actual practicability.

Description

technical field [0001] The invention belongs to the technical field of dispersion recovery, and specifically relates to a polyphenol modified chitosan adsorbent, a preparation method thereof and an application in germanium recovery. The adsorbent can effectively remove germanium metal elements from a solution. Background technique [0002] Germanium (Ge) element is called a scattered element because its reserves in nature are relatively low, and it is often associated with other metals or minerals, and there are basically no independent minerals. Since the 1970s, the world's germanium consumer market has expanded from a single semiconductor field to infrared, optical fiber, catalyst and other fields. For example, the refractive index of metal germanium in a certain wavelength range is constant, and germanium is used to make infrared lasers and thermal imagers. , infrared thermometer and other imaging components such as windows, lenses, filters, etc. Germanium is also used i...

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
IPC IPC(8): B01J20/24B01D15/08C22B41/00B01J20/30
CPCB01D15/08B01J20/24B01J2220/4825C22B41/00
Inventor 熊英张蒙蒙陈晖单炜军王月娇娄振宁
Owner LIAONING UNIVERSITY
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