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Solid phase extraction process for extracting and separating palladium

A solid-phase extraction agent and solid-phase extraction column technology, which is applied in the field of precious metal metallurgy, can solve problems such as being unsuitable for production and application, and achieve the effects of low cost, wide application range and short time.

Inactive Publication Date: 2009-06-10
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Use anion exchange resin to simultaneously adsorb Pd(II), Pt(IV), or simultaneously adsorb Pd(II), Rh(III) and Ir(IV), and then use two chemical reagent solutions (such as HCl and HClO 4 , NaOH and HNO 3 ) to elute platinum group metals separately is usually only used in analytical laboratories and is not suitable for production applications

Method used

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  • Solid phase extraction process for extracting and separating palladium

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: chloropalladium acid (H 2 PdCl 4 ) solution, H 2 PdCl 4 Solution, containing palladium 7.724g / L, medium hydrochloric acid concentration is 0.1mol L -1 , using methylenebisacrylamide and vinylimidazole polymer bonded with cetyl sulfide extractant as the stationary phase, the particle size is 250 μm, this stationary phase is filled in a φ15mm×400mm glass column, and the feed solution The volume is 60mL, the flow rate through the column is 4.0mL / min, the eluent is 0.1mol / L hydrochloric acid 30mL, the flow rate is 3.0mL / min, the eluent is 2% thiourea solution 100mL, the flow rate is 5mL / min, the injection volume 100mL. The effect of extracting Pd is shown in Table 1:

[0017] Table 1 from chloropalladium acid (H 2 PdCl 4 ) The effect of extracting Pd in ​​the solution

[0018] Element Sample solution contains palladium, effluent contains palladium, eluent contains palladium Recovery %

Embodiment 2

[0019] Embodiment 2: Weigh 5.00 g of 2,6-bisacrylamide pyridine and diacrylamide-2-methyl-1-propanesulfonic acid polymer bonded with tetradecyl sulfoxide extractant as stationary phase, polymerize The particle size of the product is 180 μm, and it is added to 100 mL of hydrochloric acid solution containing palladium 7.724 g / L, shaken on a Conrad oscillator for 2 hours, filtered, and the content of metal Pd ions is determined in the filtrate. Calculate the static adsorption capacity of polymer composite microsphere polymer to palladium.

[0020] Table 2 Determination of Static Adsorption Capacity

[0021] Element Stationary Phase Material Sample Solution Contains Palladium Filtrate Contains Palladium Adsorption Capacity

Embodiment 3

[0022] Embodiment 3: simulate the composition of feed liquid obtained from platinum group metal concentrate, with palladium 3.752g / L, platinum 5.019g / L, rhodium 0.562g / L, iridium 0.125g / L, copper 1.254g / L, iron 1.221g / mL, zinc 1.192g / mL and nickel 0.832g / mL synthetic samples were tested. Use pentaerythritol trimethacrylate bonded with n-hexadecyl sulfide and 4-styryl-nitrodiacetic acid polymer as the stationary phase, the particle size is 550 μm, and the specification of the solid phase extraction column is φ15mm×400mm; The injection volume is 32.00mL, the concentration of hydrochloric acid in the medium is 0.1mol / L, the flow rate of the feed liquid is 3ml / min, the eluent is 0.1mol / L hydrochloric acid 20mL, the flow rate is 3.0mL / min, and the eluent is 2% thiourea solution 50mL, the flow rate is 3mL / min, and the solid phase extraction column is regenerated with 40mL of 0.1mol / L hydrochloric acid.

[0023] The separation test result of palladium in the synthetic sample of tabl...

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Abstract

The solid phase palladium extracting and separating process for extracting and separating palladium from platinum metal concentrate or secondary noble metal enriching material features that palladium is separated from platinum, rhodium, iridium and base metals Cu, Ni, Fe, etc by means of polymer microsphere with bonded palladium extractant as fixing phase, hydrochloric acid solution containing metals as the flowing phase, dilute hydrochloric acid solution as the leaching solution and reagent solution capable of being complexed with palladium as the eluting liquid. The solid phase extracting column may be regenerated with dilute hydrochloric acid solution for reuse. The process of the present invention has high separating effect, high platinum, palladium and rhodium recovering rate, low cost and other advantages.

Description

1. Technical field [0001] The invention relates to a method for extracting and separating palladium by solid phase extraction, and the invention relates to the field of precious metal metallurgy. . 2. Background technology [0002] For the mutual separation of platinum group metals and the separation of platinum group metals and base metals such as copper, iron, nickel, etc., the methods currently used in production practice at home and abroad include precipitation method, solvent extraction method and ion exchange method. Each of these methods has its own characteristics. With the difference in material components and the difference in component content, each method has certain limitations in use. With regard to the extraction and separation of palladium, the methods commonly used in the production process are as follows: [0003] (1) Precipitation method: Precipitate Pt(IV) with ammonium chloride to generate (NH 4 ) 2 PtCl 6 Precipitate, Pd(II), Rh(III) and Ir(III) re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26C22B11/06
CPCY02P10/20
Inventor 黄章杰陈景韦群燕谢琦莹
Owner YUNNAN UNIV