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Method for separating platinum palladium iraurita

A technology for iridium, platinum and palladium, applied in the field of separation of platinum, palladium, iridium, can solve the problems of difficulty in stripping, high cost, troublesome operation, etc., and achieves the effects of wide application range, high recovery rate and easy operation.

Inactive Publication Date: 2003-03-05
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] (1) The precipitation method uses the inherent physical and chemical properties of various precious metals to separate and extract. This method was the first to be studied and has become a widely used traditional method. However, due to the intermittent operation and repeated crystallization, the process is lengthy. , low yield, high cost, troublesome operation and high labor intensity
[0004] (2) The solvent extraction method has the advantages of good selectivity, high recovery rate, and continuous operation. Some precious metal smelters have partially adopted the extraction and separation process, but the disadvantage of this technology is that the extraction agents used are mostly expensive. Solvents are relatively volatile and cause serious environmental pollution. Another common problem in the extraction of precious metals is that the composition of the feed liquid needs to be adjusted before extracting each precious metal, and the multi-stage extraction process is also cumbersome, and sometimes it is easy to form a third phase. difficult to extract
However, this technology has the following defects: a. It has high selectivity to ions with opposite charges in the feed liquid, but for ions with the same charge, the separation selectivity is poor. For noble metal elements with very similar physical and chemical properties, simultaneous Multi-element separation is difficult; b. The stronger the exchange or adsorption capacity, the worse the selectivity and the firmer the adsorption. It is difficult to wash and regenerate the resin or adsorbent loaded with precious metals, and some have to use incineration resin. method to recover the precious metals, and then lose the advantage of reusability, increase the processing cost, and restrict the practical application of this technology

Method used

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  • Method for separating platinum palladium iraurita
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  • Method for separating platinum palladium iraurita

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Platinum palladium concentrate separation

[0030]Platinum-palladium concentrate contains higher palladium, gold and platinum, and the test is carried out with samples containing palladium 38009g / t, gold 37611g / t and platinum 3821g / t. In the test, the processing capacity of the concentrate was 1g. Due to the low content of rhodium, iridium, cobalt, nickel, and zinc, in order to investigate the separation effect of the method on noble, base metals and precious metals, 5mg iridium, 2mg Rhodium, 5mg cobalt, 5mg nickel, 5mg zinc; the chromatographic column is φ11mm×150mm; the injection volume is 200mL, the total concentration of hydrochloric acid in the medium is 0.5mol / L, and the linear flow rate of the injection mobile phase is 10cm / min; the first group of eluent Be 300mL 0.2mol / L hydrochloric acid, 50mL water, 50mL0.1mol / L hydrochloric acid, 50mL water, 100mL0.05mol / L HCl+1g / L EDTA, mobile phase linear flow velocity 5cm / min; The second group eluent is 150mL0. 5mol / L KSC...

Embodiment 2

[0035] Copper Anode Slime Separation

[0036] In the test, the treatment volume of copper anode slime was 5g, the injection volume was 200mL, the total concentration of hydrochloric acid medium was 1.0mol / L, and the linear flow rate of the injection mobile phase was 5cm / min; the chromatographic column was φ11mm×125mm; the first group of eluent 400mL0.5mol / L hydrochloric acid, 50mL0.1mol / L hydrochloric acid, 50mL water, 50mL0.1mol / L hydrochloric acid, 50mL water, 300mL 0.2mol / L HCl+0.5g / L EDTA, mobile phase linear flow rate 10cm / min; The second group of eluent is 100mL1.0mol / L KSCN+20g / L ascorbic acid, the linear flow rate of the mobile phase is 4cm / min; the third group of eluent is 200mL MIBK equilibrated with hydrochloric acid, and the volume ratio of MIBK to concentrated hydrochloric acid is 7 / 1, the linear flow rate of the mobile phase is 4.5cm / min; the eluent of the fourth group is 25mL ethanol and 25mL water, and the linear flow rate of the mobile phase is 3cm / min; the el...

Embodiment 3

[0042] blister copper separation

[0043] The separation test was carried out with 5g crude copper, the injection volume was 200mL, the total concentration of hydrochloric acid medium was 2.0mol / L, the linear flow rate of the injection mobile phase was 10cm / min; the chromatographic column was φ11mm×130mm; the first group of eluent was 300mL. 2mol / L hydrochloric acid, 50mL water, 50mL0.1mol / L hydrochloric acid, 50mL water, 200mL0.12mol / L HCl+1g / L EDTA, mobile phase linear flow rate 15cm / min; the second eluent is 100mL 1.0mol / L NH 4 SCN+20g / L ascorbic acid, the linear flow rate of the mobile phase is 4cm / min; the third group of eluent is 200mL MIBK equilibrated with hydrochloric acid, the volume ratio of MIBK to concentrated hydrochloric acid is 10 / 1, and the linear flow rate of the mobile phase is 3cm / min ; The fourth group of eluent is 25mL ethanol, 25mL water, the linear flow rate of mobile phase is 6cm / min; the fifth group of eluent is 100mL0.5mol / L NH 4 Cl+1.0mol / L NH 3 ...

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Abstract

The present invention uses weak base phenylethylene series trialkylamine type anion-exchange resin as fixed phase and uses hydrochloric acid medium as mobile phone to implement coarse separation of platinum, palladium, iridium and gold from base metal, adopts dilute hydrochrolic acid, water and EDTA to elute base metal, and utilizes sulfocyanate+ascorbic acid solution, hydrochloric acid equilibrated methyl isobutanedione, NH4Cl+NH3.H2O solution and HCl+thiourea+thiourea+methyl alcohol solution to selectively shower-wash iridium, gold, palladium and platinum, and its chromatographic column canbe regenerated by using hydrochloric acid. Its resolution is good, the baseline separation can be obtained, and their recoveries are above 95%.

Description

Technical field [0001] The invention relates to a method for separating platinum, palladium and iridium, relating to a method for separating precious metals from base metals and mutual separation of precious metal elements when separating and extracting the above-mentioned precious metals from materials containing precious metals. Background technique [0002] Because the physical and chemical properties of noble metals, especially platinum group metals, are very similar, and their valence states vary greatly, the separation of noble metals has always been a difficult problem in hydrometallurgy and chemical analysis. At present, there are precipitation methods, solvent extraction methods, liquid membrane methods, resin extraction methods, ion exchange and adsorption methods for the separation of precious metals at home and abroad. Each of these methods has its own characteristics: [0003] (1) The precipitation method uses the inherent physical and chemical properties of va...

Claims

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Application Information

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IPC IPC(8): C22B3/24
CPCY02P10/20
Inventor 李华昌符斌周春山汤淑芳章连香
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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