Separation and enrichment determination method for Ir, Rh, Pt, Pd and Au in secondary resource material

Separation and enrichment determination method for Ir, Rh, Pt, Pd and Au in secondary resource material

  • CN 105,300,961 A
  • Filed: 10/16/2015
  • Published: 02/03/2016
  • Est. Priority Date: 10/16/2015
  • Status: Active Application
First Claim
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1. the separation and concentration assay method of iridium rhodium platinum porpezite in secondary resource material, is characterized in that containing following processing step:

  • (1) dissolving of sample;

    take 0.1g ~ 2.0g and the secondary resource material of granularity≤

    100 μ

    m, put into 30mL nickel crucible, be placed in muffle furnace, be warming up to 750 DEG C of calcinations and keep 1h, cooling, adds the Na of sample size 2 ~ 20 times amount 2o 2;

    NaCO 3=3;

    1 mixed flux, then cover 2g ~ 3gNa 2o 2, put into muffle furnace and be warming up to 750 DEG C of melting 15 ~ 25min, take out cooling, nickel crucible is put into 200mL beaker, heating water leaches fused salt, is then neutralized to solution with hydrochloric acid limpid;

    (2) oxidation of test solution;

    slowly add 2mL ~ 20mL30% sodium chlorate solution, also the sodium chlorate solid 0.6g ~ 6.0g of equivalent can directly slowly be added, boil 30 ~ 60min., adding hydrochloric acid conditioning solution volume to 100mL makes hydrochloric acid volumetric concentration reach more than 50%;

    (3) tellurium coprecipitation separation and concentration;

    In test solution, add the tellurium chloride solution containing 20mg ~ 30mg tellurium amount, after low-temperature heat is boiled on electric hot plate, drip the SnCl of 1mol/L 2after amount 2 ~ 3mL after solution is complete to precipitation, continues to be heated to precipitate further cohesion, then add the tellurium chloride solution containing 10mg ~ 20mg tellurium amount, then drip the SnCl of 1mol/L 2after amount 2 ~ 3mL after solution is complete to precipitation, heating is boiled and keeps 30min, taking off and be chilled to room temperature, filter with G3 glass sand hourglass, is that 50% hydrochloric acid solution washs beaker and precipitates each 3 ~ 5 times by volumetric concentration, discard filtrate, drip and be precipitated in former beaker in fresh warm aqua regia dissolution glass sand hourglass, reusable heat chloroazotic acid washing funnel 3 ~ 5 times, after electric hot plate heats concentrated solution, be that 10%HCl is transferred to constant volume in 25mL ~ 100mL volumetric flask by volumetric concentration, mixing;

    (4) measure;

    adopt inductive coupling plasma emission spectrograph and ICP-AES Simultaneously test step (3) to obtain iridium, rhodium, platinum, palladium, gold content in solution.

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