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

Method utilizing NaY molecular sieve to recycle rare earth from low concentration rare earth solution

A rare earth solution and molecular sieve technology, applied in the direction of improving process efficiency, can solve problems such as harming human health, affecting ecological safety, causing various diseases, etc., and achieve the effects of no environmental pollution, good regeneration, and high recovery rate.

Inactive Publication Date: 2015-03-11
NANCHANG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A large amount of low-concentration rare earth wastewater produced during the mining of ionic rare earth resources in the south will affect ecolog

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
  • Method utilizing NaY molecular sieve to recycle rare earth from low concentration rare earth solution
  • Method utilizing NaY molecular sieve to recycle rare earth from low concentration rare earth solution
  • Method utilizing NaY molecular sieve to recycle rare earth from low concentration rare earth solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) SiO 2 :Al 2 o 3 : Na 2 O: H 2 Under the condition that the molar ratio is 7:1:12:420, stir vigorously to obtain a uniform sol. After half an hour, pour it into a stainless steel reactor lined with polytetrafluoroethylene, react at 100°C for 10 hours, and take out the reactor. Cool and take out the sample and dry it, it is NaY molecular sieve.

[0023] (2) Weigh 40 mg of NaY molecular sieve and add to the 3+ , Y 3+ , La 3+ In the rare earth wastewater (different initial concentrations of ions), when the adsorption time is 70min, pH=3, V=30ml, and 25°C, the filtrate is taken after suction filtration, and the residual rare earth ion content in the solution is determined by the arsenazoⅢ colorimetric method ( Measure absorbance, according to Gd 3+ , Y 3+ , La 3+ Calculate the amount of ions that are not adsorbed by the standard curve), and then obtain the amount of ions that are adsorbed by the subtraction method. Depend on figure 1 It can be seen that when ...

Embodiment 2

[0025] (1) SiO 2 :Al 2 o 3 : Na 2 O: H 2 Under the condition that the molar ratio is 7:1:12:420, stir vigorously to obtain a uniform sol. After half an hour, pour it into a stainless steel reactor lined with polytetrafluoroethylene, react at 100°C for 10 hours, and take out the reactor. Cool and take out the sample and dry it, it is NaY molecular sieve.

[0026] (2) In rare earth ions (Gd 3+ , Y 3+ , La 3+ ) when the initial mass concentration is 100mg / L, the adsorption time is 60min, pH=4, V=30mL, and 45°C, the effect of the amount of NaY molecular sieve adsorbent on the adsorption efficiency of rare earth ions is according to the arsenazo method in Example 1 Measure the concentration of the solution to obtain the amount of adsorbed ions, which is determined by figure 2 It can be seen that as the amount of adsorbent increases, the adsorption rate also increases; when the amount of adsorbent added is greater than 40mg, the increase in the adsorption efficiency is smal...

Embodiment 3

[0028] (1) SiO 2 :Al 2 o 3 : Na 2 O: H 2 Under the condition that the molar ratio is 7:1:12:420, stir vigorously to obtain a uniform sol. After half an hour, pour it into a stainless steel reactor lined with polytetrafluoroethylene, react at 100°C for 10 hours, and take out the reactor. Cool and take out the sample and dry it, it is NaY molecular sieve.

[0029] (2) In rare earth ions (Gd 3+ , Y 3+ , La 3+ ) When the initial mass concentration is 100mg / L, the amount of adsorbent added is 40mg, pH=3, V=30ml, and 35°C, the influence of adsorption time on the adsorption efficiency is determined by the arsenazo method in Example 1. Solution concentration, The amount of adsorbed ions is obtained by image 3 It can be seen that the adsorption rate increases gradually between 0 and 50 minutes. When the adsorption time is 50 minutes, 40 mg of the adsorbent has reached the saturated adsorption capacity, and the adsorption rate is the largest, reaching 95%. After 50 minutes, the...

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 discloses a method utilizing a NaY molecular sieve to recycle rare earth from a low concentration rare earth solution. The method comprises the following steps: (1) weighing a certain amount of NaY molecular sieve, adding the NaY molecular sieve into a rare earth solution, wherein the mass ratio of the NaY molecular sieve to the rare earth ions in the rare earth solution is 12:1-14:1, and then carrying out absorption under the following conditions: an absorption temperature of 25 to 45 DEG C, a pH value of 3-5, and a vibration absorption time of 50 to 70 minutes; (2) utilizing a diluted acid or a NaCl solution to perform desorption on the NaY molecular sieves, which are obtained in the step (1) and carry rare earth ions, wherein the concentration of the diluted acid is 1 to 5 mol/L, and the rare earth is recycled from the rare earth desorption solution through a precipitation method. The absorption rate of the provided method on rare earth ions such as lanthanum, yttrium, and gadolinium can reach 96% or more, the desorption rate can reach 95% or more, the regenerative property is good, the recycling rate is high, and the method is pollution-free to the environment.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and wastewater treatment. Background technique [0002] Rare earth has penetrated into all fields of the national economy and has become an indispensable "auxiliary" for many industries, and is known as "the vitamin of modern industry". The high-efficiency rare earth extraction technology for low-quality rare earth ores and the rare earth recovery technology for low-concentration rare earth wastewater generated in the rare earth production process have received extensive attention in recent years. General wastewater treatment methods include: chemical precipitation, electrolysis, redox, ion exchange, and adsorption. The invention adopts an ion exchange method to treat low-concentration rare earth wastewater. The method is simple and easy to control, has a short process flow, is reproducible, and can purify the wastewater to a higher purity. [0003] A large amount of low-concentration ra...

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): C22B59/00C22B3/24
CPCY02P10/20
Inventor 黎先财兰俊杨沂凤程玉雯李永绣
Owner NANCHANG UNIV
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