Recovery and refining of precious metals paperback may 14 2014 recovery and refining of precious metals paperback may 14 2014 by cw ammen author visit amazons cw ammen page find all the books read about the author and more search results for this author. Recovery and refining of precious metals from hydrocarbon petroleum chemical and petrochemical processes sabin recovers pgms and other precious metals from spent catalysts with soluble and insoluble alumina silica alumina and zeolite o pgms platinum palladium ruthenium and rhodium rhenium gold silver and other precious metals. Precious metals refiners typically use one of two methods to recover and refine platinum group metals pgms from spent catalysts pgms include platinum pt palladium pd ruthenium ru and rhodium rh rhenium re which is not considered a pgm is also present in many spent catalysts and is a valuable precious metal too. Of recovering and refining precious metals has been around for a long time but even today it remains somewhat of a hidden industry this article aims to clear up some of the most common myths surrounding what is considered both a science and an art for recov ering maximum value from spent precious metal bearing catalysts when spent precious metal bear ing materials are reclaimed there