precipitation of platinum from solution with zinc

Precipitation of platinum and base metals in a gas ... of using small amounts of sulphur from a gaseous phase to precipitate platinum ions from chloride solutions, ... zinc, chromium, and PGMs ...

Zinc dust and lead nitrate, mixed with 3.5 cubic meters per hour of barren solution in the zinc mix tank, are introduced into the suction line of the precipitate filter feed pump. Gold and silver precipitation occurs as soon as the zinc and lead nitrate are added to the pregnant solution.

30-01-1991· We claim: 1. A method for the direct recovery of a platinum group metal (PGM) from a highly acidic aqueous solution resulting from the acid leaching of precious metal bearing material, which comprises adding stabilized alkali metal borohydride to the solution at ambient temperature and pressure to effect reduction precipitation of the PGM from solution, separating the precipitated platinum ...

Zinc oxide nanoparticles were obtained directly avoiding the calcination step by precipitation at 70 176 C in bicontinuous microemulsions stabilized with a mixture of surfactants sodium bis 2-ethylhexyl sulfosuccinate/sodium dodecyl sulfate 2/1 wt/wt containing 07 M zinc nitrate aqueous solution Two concentrations of aqueous solution of precipitating agent sodium hydroxide were used...

Zinc Precipitation Stage Of Gold Deposition. Metal deposition method using Zn powder (Zinc precipitation) was first introduced by Sulman and Teed (1895). Basic usage of this method is the electron affinity of zinc metal is much higher than in metals gold and silver, then gold and silver metals will sink and be replaced by a soluble zinc.

A method of precipitating a zinc containing solid from an acidic solution containing dissolved zinc and magnesium comprising contacting the solution with a calcium containing neutralising agent to raise the pH of the solution to 4.5 to 7.5 at a temperature of from 70 to 95°C to thereby precipitate a solid zinc containing material and gypsum without causing substantial precipitation of ...

Platinum group metals behaviour during iron precipitation ... Sodium di‐(n‐octyl) phosphinate (NaL) was used as a precipitating agent to remove heavy metals from aqueous nitrate solutions.Cadmium, zinc and mixtures of lead, cadmium and zinc were precipitated in the form of PbL 2(s), CdL 2(s), and ZnL 2(s).Lowering the pH of the feed solution reduced the removal of the metals as some of the ...

20-01-2021· precipitation of platinum from solution with zinc. Platinum group metals behaviour during iron precipitation ... Sodium di‐(n‐octyl) phosphinate (NaL) was used as a precipitating agent to remove heavy metals from aqueous nitrate solutions.Cadmium, zinc and mixtures of lead, cadmium and zinc were precipitated in the form of PbL 2(s), CdL 2(s), and ZnL 2(s).Lowering the pH of the feed ...

19-11-2016· After vacuum filtration we have the left over solution on the left and the pure platinum salt on the right. In the foreground is a stannous test of the left over solution indicating there is still a slight bit of Pt in the solution. Tomorrow I will convert the Pt salt to metal using zinc and dilute HCl.

PRECIPITATION OF PLATINUM AND BASE METALS IN A GAS-LIQUID CHLORIDE SYSTEM 209 Experimental approach Reagents Reagents used throughout the study were pure analytical pure standard grade solutions of platinum (H 2PtCl 6), iron (FeCl 2), cobalt (CoCl 2), and chromium (CrCl 3) assaying 1000 mg/L each; 32% analytical grade HCl. Analytical grade SO