High-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as leaching agent

An ion adsorption type and extraction method technology, which is applied in the field of ion adsorption type rare earth efficient green extraction, can solve the problems of serious emulsification and difficult separation of rare earth and aluminum, and achieve the effect of simple extraction and separation, avoiding emulsification and three-phase problems

Active Publication Date: 2017-02-01
NANCHANG UNIV
View PDF8 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the ability of naphthenic acid to extract aluminum is stronger than that of rare earths, and aluminum can be preferentially extracted under higher pH conditions, but the emulsification is se

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
  • High-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as leaching agent
  • High-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as leaching agent
  • High-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as leaching agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 The leaching effect of different leaching agents on ion adsorption type rare earth

[0022] Ammonium sulfate, ammonium chloride, magnesium sulfate, magnesium chloride, aluminum sulfate and magnesium chloride solutions of the same normal concentration (0.1N) are used respectively for the same ore sample at the same column ratio and leaching liquid-solid ratio (leaching agent solution to ore The weight ratio is 1:1, the ratio of top water to ore weight is 0.2:1), the leaching effluent is collected, and samples are sent to the Analysis and Testing Center of Jiangxi Geology and Mineral Bureau for ICP-MS analysis. The results are listed in Table 1. It can be seen that the leaching effect of sulfate of the same metal ion is better than that of chloride. The leaching effect of sulfate is good, among which the leaching effect of aluminum sulfate is the best, followed by ammonium sulfate and magnesium sulfate is the least. It shows that aluminum sulfate has the highes...

Embodiment 2

[0023] Example 2 The efficiency comparison of extracting rare earths from various leaching solutions with N1923 and back-extracting rare earths with hydrochloric acid

[0024] Use 20% N1923-10% 2-octanol-70% kerosene as the extraction organic phase, after 1MH 2 SO 4 After the solution is protonated, it is used to extract the rare earth in the leaching solution. The ratio is 1:2. The organic phase after the rare earth extraction is back-extracted with hydrochloric acid. The results are also listed in Table 1. The results show that the residual amount of rare earth in the raffinate of primary extraction is low, and the extraction rate is above 99%. However, the residual amount of aluminum is large and the extraction rate is low. In the stripping solution, the concentration of rare earth is high, while the concentration of aluminum is low. A good purification effect has been achieved. The table also lists that the rare earth in the raffinate can be reduced to less than 0.01p...

Embodiment 3

[0025] Example 3 Comparison of Effects of Aluminum Sulfate and Magnesium Sulfate Solution on Ion Adsorption Type Rare Earth Staged Leaching

[0026] The amount of ore is 2 kg, and the leaching liquid, top replenishment water and washing water are rinsed according to the liquid-solid ratio of 1:1, 0.2:1 and 1:1 respectively, and the effluent is received in stages, and the metal ions in the effluent are respectively measured Concentration, the results are shown in Table 2. For the leaching of aluminum sulfate, follow-up tail protection steps such as lime water + water washing are also added. The results of the analysis of the resulting effluent are also listed in Table 2. It can be seen from the results that the leaching effect of aluminum sulfate is still higher than that of magnesium sulfate, and the content of rare earths in the effluent of subsequent washing is also much lower than that of magnesium sulfate leaching, indicating that aluminum sulfate has a strong ability to ...

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 high-efficient and green ion-absorbed-type rear earth extraction method by adopting aluminum sulfate as a leaching agent. The method comprises the steps of preparing a leaching agent solution; leaching ion-absorbed-type rear earth, using primary amine for extracting rare earth, uranium, thorium and ferrum from the leaching solution and reverse extracting the rare earth, the uranium, the thorium and the ferrum from an extraction organic phase; using p227 for extracting heavy rare earth, the uranium and the thorium from a reverse extraction liquid; using hydrochloric acid for reverse extracting and separating the rare earth from the uranium and the thorium; using hydroxide and basic oxide for precipitating residual aluminium-ferrum-thorium from the reverse extraction liquid; preparing rare earth products with different specifications through a precipitation method; unoiling and recycling a raffinate; recycling precipitated wastewater; protonizing an extracted organic phase; and the like. According to the method, the leaching efficiency of the current ion-absorbed-type rear earth can be remarkably improved, the emission of harmful elements is greatly reduced, radioactive elements such as the uranium and the thorium are reasonably treated and recovered, the pollutant load in a tail water immersion liquid is ensured to meet the emission requirement, the security and the stability of tailings are improved, and the method is a key technology for realizing high-efficient and green ion-absorbed-type rear earth extraction.

Description

technical field [0001] The invention relates to an ion-adsorption type rare earth high-efficiency green extraction method using aluminum sulfate as the main leaching agent, and belongs to the technical field of rare earth hydrometallurgy and environmental protection. [0002] technical background [0003] Ion-adsorbed rare earth is a unique type of rare earth deposit discovered and named in Longnan, Jiangxi Province for the first time. Its rare earth content is low and it is mainly adsorbed by various clay minerals and colloidal particles in the deposit in an ion state. This kind of rare earth can be exchanged and leached by various types of electrolyte solutions. Based on this, the rare earth extraction technology using sodium chloride and ammonium sulfate as the main leaching reagents is proposed, and large-scale industrial production has been realized. Recently, more and more attention has been paid to the extraction technology of using divalent metal ion salt instead of m...

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): C22B59/00C22B3/08C22B3/28C22B3/44C22B3/38C22B60/02
CPCC22B3/08C22B3/44C22B59/00C22B60/026C22B60/0291C22B3/282C22B3/3842
Inventor 李永绣杨丽芬李翠翠许秋华张丽王悦周新木周雪珍刘艳珠李静
Owner NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap