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Chemical analysis method of rhodium content

A technology of rhodium content and silicon dioxide, applied in the field of chemical analysis, can solve the problems of unreported analysis method, long process flow, complicated operation steps and the like

Inactive Publication Date: 2012-10-03
GUANGZHOU RES INST OF NON FERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the analytical method for the determination of 0.1-1000g / t rhodium content in materials such as anode slime and smelting slag containing silver by lead assay
[0007] In addition, rhodium is chemically stable. Under normal pressure, it is difficult for inorganic acid to completely dissolve rhodium. Generally, it is necessary to add inorganic acid to a high-pressure sample dissolution tank to heat and dissolve the sample. However, the process is long, the operation steps are cumbersome, and the workload is heavy.

Method used

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  • Chemical analysis method of rhodium content
  • Chemical analysis method of rhodium content
  • Chemical analysis method of rhodium content

Examples

Experimental program
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Embodiment 1

[0038] Weigh 0.5002g of 1# catalyst, add 20g of anhydrous sodium carbonate, 10g of borax, 9g of silicon dioxide, 3.2g of flour and 80g of lead oxide, weigh 5mg of silver powder and 15mg of sponge palladium powder as ash blowing protection agent, mix well, and transfer to assay gold Crucible, put the crucible into the gold assay furnace whose temperature has been raised to 800°C, close the furnace door, quickly raise the temperature to 1100°C and keep it warm for 20 minutes, remove the crucible out of the furnace, cool down, take out the lead buckle, put the lead buckle into the Preheat the ash dish for more than 20 minutes in a muffle furnace at ℃, close the furnace door for 2 minutes, and melt the lead buckle. , take out the ash dish, cool down; put the pellets into a 100mL beaker, add 10mL of 1:3 HNO 3 : water, heating to dissolve, adding 10mL of ρ1.19g / mLHCl, heating, evaporating to 0.5mL, cooling, constant volume in a 100mL volumetric flask, and ICP-AES to measure the rhod...

Embodiment 2

[0040] Weigh 1.5010g of 1# catalyst, add 20g of anhydrous sodium carbonate, 10g of borax, 8g of silicon dioxide, 3.2g of flour and 80g of lead oxide, weigh 10mg of silver powder and 50mg of sponge palladium powder into a mixing bottle, mix well, and transfer to the sample mixing bottle. For the gold crucible, put the crucible into the gold assay furnace whose temperature has been raised to 800°C, close the furnace door, rapidly raise the temperature to 1100°C and keep it warm for 20 minutes, remove the crucible from the furnace, cool down, take out the lead buckle, put the lead buckle into the Preheat the ash dish in a muffle furnace at 920°C for more than 20 minutes, close the furnace door for 2 minutes, and melt the lead buckle. Afterwards, remove the ash dish and let it cool. Put the pellets into a 100mL beaker, add 20mL of 1:3 HNO 3 : water, heating to dissolve, adding 15mL of ρ1.19g / mLHCl, heating, evaporating to 5mL, cooling, constant volume in a 100mL volumetric flask,...

Embodiment 3

[0042]Weigh 10.00g of 2# smelting slag, add 30g of anhydrous sodium carbonate, 10g of borax, 15g of silicon dioxide, 4g of flour and 120g of lead oxide, calculate that the amount of silver contained in the sample is 5.5mg, weigh 100mg of silver powder, and 300mg of sponge palladium powder Put it into the sample mixing bottle, mix it evenly, move it into the assay gold crucible, put the crucible into the assay gold furnace that has been heated to 800°C, close the furnace door, rapidly raise the temperature to 1100°C and keep it warm for 20 minutes, remove the crucible out of the furnace, and cool it down. Take out the lead buckle, put the lead buckle into the ash dish that has been preheated in a muffle furnace at 920°C for more than 20 minutes, close the furnace door for 2 minutes to melt the lead buckle, and after the lead buckle peels off, open the furnace door and lower the furnace temperature to 900°C, continue ash blowing, when the silver beads flash, take out the ash dish...

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Abstract

The invention discloses a chemical analysis method of rhodium content. The chemical analysis method is characterized by comprising the steps of: weighing a sample and arranging the sample in a crucible, adding anhydrous sodium carbonate, borax, silica, flour and lead oxide, adding sponge palladium powder and silver powder, putting the crucible into a furnace at 800 DEG C, heating to 1100 DEG C, carrying out heat preservation, removing the crucible to cool, taking out a lead button, putting the lead button into a cupel preheated in the furnace, and cupellating; and putting the generated particles into a container, adding HNO3 (nitric acid), heating and dissolving HNO3, adding HCl (hydrochloric acid), heating, evaporating, determining the volume and measuring rhodium content by ICP-AES (inductively coupled plasma-atomic emission spectrometry). The method is a simple and fast analysis method of rhodium content with an accurate result, and is suitable for measurement of 0.1-1000g / t of rhodium in various complicated samples, particularly suitable for fast measurement of rhodium content in materials such as anode mud containing silver, smelting slag and the like.

Description

technical field [0001] The invention relates to a chemical analysis method, in particular to a chemical analysis method for precious metal elements. Background technique [0002] Rhodium is a precious metal, very expensive, with good catalytic performance and stable chemical properties, so it is extremely important in metallurgy, chemical industry, petroleum, glass, analytical chemistry and modern industry. Anode slime, catalysts, smelting slag and other materials contain rhodium, and accurate measurement results of rhodium content need to be provided in various links such as smelting, recycling, trade circulation, and product arbitration. [0003] The accurate determination of rhodium content has always been a difficult problem in analytical chemistry. Due to the complex composition and low content of the material, the analysis of the rhodium-containing material must first enrich and separate the sample, and then use spectrophotometry, atomic absorption method, gravimetric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N1/44
Inventor 林海山唐维学戴凤英刘天平
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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