Efficient routes for precious metal recovery from complex homogeneous systems
Dr Jamie Conway-Baker of Mastermelt UK discusses the collaborative approach to the problem of metal recovery from difficult waste streams
Homogeneous catalysts are fast becoming the preferred catalyst choice over heterogeneous systems across multiple sectors such as pharmaceuticals , agrochemicals , and flavours and fragrances . The global homogeneous catalyst market was valued at $ 4.4 billion in 2020 and is expected to reach $ 6.5 billion by 2026 , growing at a CAGR of 6.5 % during the forecast period .
Platinum , palladium and rhodium are typically used in the form of metal complexes consisting of the metal ion bound to one or more ligands . While these catalysts provide numerous advantages , their precious metal residues can be difficult to treat and refine , resulting in lower recoveries , challenging process economics and environmental concerns . Additionally , strict regulations regarding the transportation of hazardous materials make managing these catalysts even more complex .
The precious metal is often the most expensive component of the catalyst . Therefore it is becoming ever more important to create an efficient , circular economy for such metals . In this article , we will examine the factors that influence treatment routes , technology options , and how to maximise economic recovery with the assistance of a technology partner .
Figure 2 - Primary treatment routes for homogeneous waste stream trials
22 SPECIALITY CHEMICALS MAGAZINE ESTABLISHED 1981