Method for separating and purifying rhodium in impurity-containing rhodium solution

A purification method and solution technology, applied in the field of rhodium extraction, can solve the problems of long precipitation operation time, inability to remove palladium, limited separation and purification effect, etc., and achieve the effects of easy filtration and rinsing, high specific gravity, convenient and fast operation

Active Publication Date: 2021-08-20
ZHEJIANG TELI RECYCLING RESOURCES
View PDF14 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But platinum generally exists with four valences in solution, and palladium exists with two valences, and divalent palladium does not react with tetramethylammonium chloride, so this method is limited to the separation and purification effect of the rhodium solution containing platinum and palla

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 for separating and purifying rhodium in impurity-containing rhodium solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for separating and purifying rhodium in an impurity-containing rhodium solution, comprising the following processing steps:

[0030] S1 Adjust the acidity of the rhodium solution to 6mol / L, the heating temperature is 60-80°C, the rhodium concentration is 5-8g / L, slowly add the prepared DETA solution while stirring, the amount added is 8 times the amount of rhodium in the solution, and A large amount of red precipitate was cooled, filtered and washed to obtain filtrate 1; reduced iron powder was added to filtrate 1 in S1 to replace rhodium ions in the filtrate. In S1, because a large number of metal impurity ions remain in the solution, zinc powder is not used for replacement, and reduced iron powder is selected to replace rhodium ions in filtrate 1, so as to avoid the replacement of impurity metals into the replacement slag. Among them, the prepared DETA solution is composed of 1.13Kg of deionized water, 3.56Kg of analytically pure hydrochloric acid, and 1Kg of...

Embodiment 2

[0037] A method for separating and purifying rhodium in an impurity-containing rhodium solution, comprising the following processing steps:

[0038] S1 Adjust the acidity of the rhodium solution to 7mol / L, the heating temperature is 60-80°C, the rhodium concentration is 5-8g / L, slowly add the prepared DETA solution while stirring, the amount added is 9 times the amount of rhodium in the solution, and A large amount of red precipitate was cooled, filtered and washed to obtain filtrate 1; reduced iron powder was added to filtrate 1 in S1 to replace rhodium ions in the filtrate. In S1, because a large number of metal impurity ions remain in the solution, zinc powder is not used for replacement, and reduced iron powder is selected to replace rhodium ions in filtrate 1, so as to avoid the replacement of impurity metals into the replacement slag. Among them, the prepared DETA solution is composed of 1.13Kg of deionized water, 3.56Kg of analytically pure hydrochloric acid, and 1Kg of...

Embodiment 3

[0045] A method for separating and purifying rhodium in an impurity-containing rhodium solution, comprising the following processing steps:

[0046] S1 Adjust the acidity of the rhodium solution to 8mol / L, the heating temperature is 60-80°C, the rhodium concentration is 5-8g / L, slowly add the prepared DETA solution while stirring, the amount added is 10 times the amount of rhodium in the solution, and A large amount of red precipitate was cooled, filtered and washed to obtain filtrate 1; reduced iron powder was added to filtrate 1 in S1 to replace rhodium ions in the filtrate. In S1, because a large number of metal impurity ions remain in the solution, zinc powder is not used for replacement, and reduced iron powder is selected to replace rhodium ions in filtrate 1, so as to avoid the replacement of impurity metals into the replacement slag. Among them, the prepared DETA solution is composed of 1.13Kg of deionized water, 3.56Kg of analytically pure hydrochloric acid, and 1Kg o...

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 for separating and purifying rhodium in an impurity-containing rhodium solution. The method comprises the following process steps: S1, adjusting the acidity of the rhodium solution to 6-8 mol/L, and adding a prepared DETA solution to obtain filtrate I; S2, adding aqua regia into organic rhodium salt precipitate, heating and dissolving, adding hydrochloric acid to adjust the acidity of the solution to be 6mol/L and the rhodium concentration to be 50-80g/L, heating and boiling the solution, adding ammonium chloride to generate ammonium rhodate chloride precipitate, and quickly filtering to obtain filtrate II; and adding zinc powder into the filtrate to replace rhodium ions in the rhodium solution; S3, removing trace metal impurity ions through hydrogen type cationic resin; S4, adding hydrazine hydrate for reduction to prepare rhodium black; S5, mixing replacement slag, drying, and soaking with 1: 1 hydrochloric acid to remove zinc and other metal impurities; and S6, after filtering, dissolving filter residues with aqua regia, and returning the leachate to a purification process. The method has the characteristics of high direct recovery rate, simple operation process and high purity, and qualified rhodium powder with the purity of more than 99.95% can be obtained after the rhodium black is subjected to hydrogen reduction.

Description

technical field [0001] The invention relates to a method for extracting rhodium, in particular to a method for separating and purifying rhodium in an impurity-containing rhodium solution. Background technique [0002] The methods for separating and purifying rhodium from the solution include sodium nitrite complexation method, ammonification method, potential controlled precipitation method, hydrolysis method, solvent extraction method, etc. Sodium nitrite complexation is one of the most effective methods to remove base metal impurities in rhodium solution, but it is narrow in scope of materials and lengthy in process; ammonification method is based on the reaction of ammonium hexarhodium chlorate and ammonia water to generate pentaammonium dichloride- Precipitation with chlorine and rhodium, but the operation process of this method is cumbersome, and the recovery rate of rhodium is low; the potential control precipitation method will adsorb rhodium during the precipitation ...

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): C22B11/00C22B3/44C22B3/46C22B3/24
CPCC22B11/04C22B3/44C22B3/46C22B3/24Y02P10/20
Inventor 易秉智陈剑峰彭金鑫
Owner ZHEJIANG TELI RECYCLING RESOURCES
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