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Method for separating iridium and platinum through polystyrene-4-methylthiazole sulfoxide resin

A technology of methylthiazole sulfoxide and polystyrene, which is applied in the field of separating iridium and platinum with polystyrene-4-methylthiazole sulfoxide resin, and can solve the problems of lack of industrial scale application, great environmental hazards, poor selectivity, etc. problems, to achieve the effect of low cost, low equipment corrosion and high separation coefficient

Inactive Publication Date: 2016-11-09
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have their own shortcomings: solvent extraction is not suitable for dilute solutions, and in addition, due to the use of a large amount of organic solvents, it is also more harmful to the environment
However, these adsorbents used have a common problem that is poor selectivity, so the separation of iridium and platinum by adsorption has not been applied on an industrial scale so far.

Method used

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  • Method for separating iridium and platinum through polystyrene-4-methylthiazole sulfoxide resin
  • Method for separating iridium and platinum through polystyrene-4-methylthiazole sulfoxide resin
  • Method for separating iridium and platinum through polystyrene-4-methylthiazole sulfoxide resin

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Experimental program
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Effect test

Embodiment 1

[0022] Take by weighing 2.0g resin as stationary phase, add C (HCl) to be 0.5mol / L, through K 2 S 2 o 8 In the 100mL Ir(IV) solution with a concentration of 8500mg / L after solution oxidation treatment, shake for 60min, filter out the loaded PS-4-MTS; measure the Ir adsorption, add the filtered out Ir-loaded resin to 40mL 1% NaOH In the solution, shake for 30 minutes, filter out the PS-4-MTS in the desorption solution, wash the PS-4-MTS twice with distilled water, absorb the same Ir(IV) solution again, and measure the static adsorption capacity value for 6 cycles.

[0023] Advantage of the present invention, can find out from above-mentioned experiment, the mensuration result of 6 cycles static adsorption capacity is as shown in table 1:

[0024] Table 1. Determination of cyclic static adsorption capacity

[0025] Cycles

[0026] It can be seen from Table 1 that after 6 cycles of use, the static adsorption capacity of PS-4-MTS for Ir(IV) did not decrease significan...

Embodiment 2

[0028] 1. Weigh 1.0gPS-4-MTS as stationary phase, add to C(HCl) to 0.1mol / L, 2 S 2 o 8 In the 50mL mixed material liquid containing Ir and Pt after the solution was oxidized, the contents of Ir and Pt in the mixed material liquid were 20mg / L and 50mg / L respectively, shaken for 30min, and filtered out the loaded PS-4-MTS; determination of Ir adsorption The amount is 0.99mg / g.Ir and Pt separation coefficient is 4.9×10 4 (see Table 2 for specific data).

[0029] 2. Add the filtered Ir-loaded PS-4-MTS into 20 mL of 0.5% NaOH solution, shake for 20 minutes, and filter out the PS-4-MTS in the desorption solution. Measure the content of Ir in the desorption solution, and calculate the desorption rate (see Table 2 for specific data).

Embodiment 3

[0031] 1. Weigh 2.0g PS-4-MTS as stationary phase, add to C(HCl) to 0.2mol / L, 2 S 2 o 8 In the 100mL mixed material solution containing Ir and Pt after the solution was oxidized, the contents of Ir and Pt in the mixed material solution were 110mg / L and 160mg / L respectively, shaken for 30min, and filtered out the loaded PS-4-MTS; determination of Ir adsorption The amount is 5.45mg / g.Ir and Pt separation coefficient is 1.7×10 4 (see Table 2 for specific data).

[0032] 2. Add the filtered Ir-loaded PS-4-MTS into 40 mL of 0.5% NaOH solution, shake for 25 minutes, and filter out the PS-4-MTS in the desorption solution. Measure the content of Ir in the desorption solution, and calculate the desorption rate (see Table 2 for specific data).

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Abstract

The invention discloses a method for separating iridium and platinum through polystyrene-4-methylthiazole sulfoxide resin, and belongs to the technical field of platinum group metal separation. The method comprises the steps that the polystyrene-4-methylthiazole sulfoxide resin (PS-4-MTS for short) is used as an adsorbent, Ir(IV) in a 0.1-0.5 mol / L hydrochloric acid medium is adsorbed according to the solid-liquid ratio of 1:50(g / mL), the PS-4-MTS adsorbs Ir in an Ir and Pt mixed solution, Pt is reserved in a water phase, and Ir on the resin is desorbed through an 0.5%-1% NaOH solution. Ir and Pt are separated through the adsorbability difference of the PS-4-MTS adsorbent for Ir and Pt, the operation process is simple and environmentally friendly, the Ir and Pt separation coefficient is high, and the PS-4-MTS adsorbent is good in stability and capable of being reused.

Description

technical field [0001] The invention relates to a method for separating iridium and platinum with polystyrene-4-methylthiazole sulfoxide resin (PS-4-MTS for short), in particular to an efficient iridium and platinum adsorption method with high selectivity and large adsorption capacity. new method of separation. It belongs to the field of precious metal metallurgy. Background technique [0002] Iridium and platinum are extremely stable elements among the platinum group metals, and their chemical properties will not change significantly due to oxidation even in a high-temperature environment. It is precisely because of this excellent performance that iridium and platinum are often made into platinum-iridium alloys, which are widely used in aviation, aerospace, electronic communications and other industries. Due to the scarcity of iridium and platinum resources, their prices are relatively expensive. Therefore, the recovery of iridium and platinum from secondary resources has...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B3/24
CPCC22B11/04Y02P10/20
Inventor 黄章杰陈加希李荣张金燕吴胜杰陈慕涵
Owner YUNNAN UNIV
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