What is the process of electro refining?
Electrorefining is a process in which materials, usually metals, are purified by means of an electrolytic cell. An electric current is passed between a sample of the impure metal and a cathode when both are immersed in a solution containing cations of the metal.
How is platinum refined?
Refining platinum ore is a costly and laborious process. Froth generated at the top of a flotation cell concentrates the platinum particles. The dried powder is then heated to extremely high temperatures to remove impurities. Air is blown over the matte that remains after smelting to eliminate unwanted iron and sulfur.
Can platinum be extracted by electrolysis?
Reactivity and extraction method The table displays some metals in decreasing order of reactivity and the methods used to extract them. Metals more reactive than carbon, such as aluminium, are extracted by electrolysis, while metals less reactive than carbon, such as iron, may be extracted by reduction with carbon.
How platinum is purified?
One suitable method for purification for the raw platinum, which contains platinum, gold, and the other platinum-group metals, is to process it with aqua regia, in which palladium, gold and platinum are dissolved, whereas osmium, iridium, ruthenium and rhodium stay unreacted.
Which metals are refined by electrolytic refining?
Answer: (a) Electrolytic refining is used for metals like Cu, Zn, Ag, Au etc. The method to be used for refining an impure metal depends on the nature of the metals well as on the nature of impurities present in it. So, metals Au (gold) and Cu (copper) are refined by electrolytic refining.
Which metal is generally refined by electro refining process?
copper
Electrolytic refining is a process of refining a metal (mainly copper) by the process of electrolysis.
What is platinum and palladium used for?
Both platinum and palladium are used in automotive catalytic converters, electrodes in medical equipment, and in fine jewelry. Platinum is also used in dentistry, in the form of surgical instruments and electrical contacts, as well as in the production of strong, permanent magnets.
How hard is it to mine platinum?
Platinum that has been mined is about 30 times more rarer than gold, so extracted platinum. It’s actually very similar to the level of gold found in the earth’s crust, but the deposits are harder to find and we’ve been less successful at extracting it previously.
Which metal Cannot be extracted by electrolysis?
– Copper, silver and chromium have very high standard reduction potentials of +0.52V, +0.79V and +1.33V. – Therefore, the metal that cannot be obtained by electrolysis of an aqueous solution of its salt is calcium.
Why platinum is used as catalyst?
Platinum works as a catalyst by collecting oxygen atoms (O), and letting them bind with the toxic carbon monoxide (CO), to create the less harmful carbon dioxide (CO2). The researchers discovered that the oxygen atoms are somewhat “loose,” so that they can easily react with other substances.
What is the difference between electrolysis and electrolytic refining?
The electrolytic reduction is the process of reducing metals via electrolysis, while electrolytic refining is the process of extraction of metals using electrolysis.
What is the platinum extraction process?
The complete process of extraction consists essentially of enriching this matte to approximately 65 per cent content of platinum metals and then treating this concentrate with acids to separate the individual platinum group metals from each other, followed by final refining.
How long does it take to refine platinum ore?
Refining platinum ore is a costly and laborious process. It can take from eight weeks to six months to process a batch of ore, and it can take up to 12 tons (11 tonnes) of ore to produce a single troy ounce of platinum.
What is the electrolytic nickel refinery process?
These anodes, which contain practically all the platinum metals, are then passed into the electrolytic nickel refinery. Copper anodes from the converter process are dissolved electrolytically using an acid copper sulphate solution as an electrolyte.
What is the basic silver electrorefining process?
Basic silver electrorefining process showing silver dissolution operations, electrorefining, and spent electrolyte treatment. Two basic cell designs are used in silver electrorefining: the Balbach−Thum (horizontal) cell and the Moebius (vertical) cell ( Figure 34.12 ).