Supercharge Your Innovation With Domain-Expert AI Agents!

A strong acid-resistant magnetic adsorption particle

A magnetic adsorption and magnetic particle technology, applied in the direction of adsorption of water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problems of acid resistance, secondary pollution, magnetic particles losing magnetism, etc.

Active Publication Date: 2019-06-04
NANJING UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic coating or silicon oxide and silicon coupling agent coating materials, etc., although the material itself can withstand more acidic conditions, but because the coating is porous and usually hydrophilic, the acid solution is easy to absorb under acidic conditions. Penetrate the channels and corrode the coated Fe 3 o 4 Or magnetic nuclei such as iron oxide, so that the magnetic particles lose their magnetism and dissolve metal ions such as iron to form secondary pollution
To sum up, the structures in the prior art that use polymer coating to enhance acid resistance can only reach pH 1, and reach 1M in a short time.

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 strong acid-resistant magnetic adsorption particle
  • A strong acid-resistant magnetic adsorption particle
  • A strong acid-resistant magnetic adsorption particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] [Example 1] Fe 3 o 4 Synthesis

[0035] Synthesis of magnetic Fe according to literature 3 o 4 Particles, the specific operation is as follows: under the protection of inert gas, 7.05g FeCl 3 and 4.3g FeCl 2 4H 2 O was dissolved in 200 mL deionized water and heated to 85 °C. Add 40ml concentrated ammonia water and stir for 30min. Then use a magnet to attract sedimentation, and wash with deionized water several times until nearly neutral. Wash twice with ethanol, 100 mL each time. Drain the residual ethanol and dry to obtain micronanoscale Fe 3 o 4 .

Embodiment 2

[0036] [Example 2] Silicon oxide coated magnetic particles (Fe 3 o 4 @SiO 2 )

[0037] With 100mL ethanol with Fe in embodiment 1 3 o 4 The particles were dispersed in 25mL of water by ultrasonic treatment for 30min. Under mechanical stirring, a mixture of 50mL of ethanol and 1mL of ammonia water was added dropwise. After stirring for 15min at 30°C, 10mL of tetraethoxysilane (TEOS) was added and reacted for 1h.

Embodiment 3

[0038] [Example 3] Magnetic particle coating hydrophobic layer (Fe 3 o 4 @SiO 2 @SiWO, WO means hydrophobic group)

[0039] Following Example 2, continue to add 1 mL of ammonia water, 10 mL of TEOS, and 6 mL of dimethyldiethoxysilane (DMDES) for reaction, and then add 1 mL of ammonia water and 6 mL of DMDES after 30 minutes for reaction for 4 hours. The magnet is settled, washed with water, and repeated many times until it is nearly neutral. Then wash twice with ethanol. After dispersing the magnetic powder with 150 mL of ethanol, add 1 mL of ammonia water and 6 mL of DMDES under stirring, and react for 2 days. The magnet is settled, washed with water several times, and then washed with ethanol until nearly neutral. Drain the remaining ethanol and dry to obtain hydrophobic magnetic particles.

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 a strong-acid-resistant magnetic adsorption particle. The magnetic chelation adsorption particle using silane for coupling a hydrophobic layer and coating polymers for enhancing the acid-resistant performance has a coating structure formed by an Fe3O4 magnetic particle, an amorphous silicon oxide, a hydrophobic layer and a high-molecular polymer layer from the core to the case; the high molecular polymer layer has metal ion adsorption functional groups; the hydrophobic layer is formed by hydrolyzing alkylalkoxy silane and performing coating to form an adsorbent grafted with 6-methylene amino carboxyl-1-hydroxyl-2-(1H)-pyridyl ketone; iron in metal salts can be removed through adsorption under the sulfuric acid and hydrochloric acid conditions being higher than 3M; regeneration and repeated use can be realized.

Description

technical field [0001] The invention relates to an acid-resistant magnetic adsorption particle, and further relates to a magnetic chelation adsorption particle which uses silicon to couple a hydrophobic layer and coats a polymer to enhance acid resistance. Background technique [0002] Magnetic particles can be attracted with a magnet. The surface of magnetic particles can be endowed with physical and chemical functions. After it acts in the solution, for example, after adsorbing a certain metal ion, organic compound, protein, etc. in the solution, it can be attracted by a magnet to gather magnetic particles and separate them from the solution. The adsorbed species can be removed without separation and purification operations such as precipitation and extraction. [0003] When using cheap Fe 3 o 4 As a magnetic core, it is more feasible to make magnetic particles with adsorption function, which can be applied in relatively mild environments, such as weakly acidic, neutral...

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): B01J20/26B01J20/28B01J20/32C02F1/28C02F101/20C02F101/22
CPCB01J20/06B01J20/103B01J20/264B01J20/28009B01J20/28019B01J20/3219B01J20/328B01J20/3289C02F1/288C02F2101/20C02F2101/203C02F2101/206C02F2101/22
Inventor 白志平刘福强官凯文胡陈辰汪天泽
Owner NANJING UNIV
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