CATALYSTS
Figure 1 - Recovery routes for precious metals
Co-catalysts like fluorine , iodine , and triphenylphosphine can influence the treatment route . Proper segregation of these elements is essential to maximise recovery and minimise complications during the refining process .
Figure 2 shows some of the considerations affecting the choice of primary treatment route to trial . The exact characteristics and process economics should be reviewed after initial test work .
Once the initial recovery has been completed , the processing of the precious metals should be carried out by a provider with proven expertise of the exact material type . There is a significant advantage in working with a technology provider who has expertise in all steps of the treatment .
Case study
Mastermelt takes a multi-technology approach to homogeneous
Laboratory work at Mastermelt catalyst refining with expertise in scavenging , advanced distillation and advanced thermal treatment alike .
During a customer review with a chemical manufacturer , it became apparent that there was a significant stock of rhodium homogenous catalyst residues on site . As the client ran many complex syntheses for its products , there was a significant variation of the types of residues including solvents , distillation bottoms , aqueous residues and solids .
The client had tried to work with other precious metal refiners but none could offer a solution on these materials . With a strong collaborative approach , Mastermelt characterised the different material types and carried out development of different recovery process routes . It assisted in successfully gaining the environmental permitting and
transport before treating the catalyst residues using the technologies described in this article .
Conclusion
In the rapidly expanding homogeneous catalyst market for precious metals , companies must address the challenges associated with the complex catalyst residues . By partnering with a technology provider that can collaborate and offer all technology options , there is a greater chance of success .
A thorough understanding of the factors influencing treatment routes and technology options enables companies to make informed decisions that result in improved process economics , better environmental compliance and enhanced circularity .
Utilising a customised flowchart as a decision-making tool can further assist in selecting the appropriate technology option based on catalyst characteristics and other factors . Ultimately , the right technology partner , combined with a comprehensive understanding of the market and available options , can pave the way for a more sustainable and economically viable approach to managing precious metal catalysts in the homogeneous catalyst market . ●
Jamie Conway-Baker
CHIEF OPERATING OFFICER
MASTERMELT GROUP k + 44 207 400 3400 J info @ mastermeltgroup . com j www . mastermeltgroup . com
24 SPECIALITY CHEMICALS MAGAZINE ESTABLISHED 1981