Andrew R Marchbank

Title: The Innovative Contributions of Andrew R Marchbank

Introduction

Andrew R Marchbank is a notable inventor based in Oakville, CA. He has made significant contributions to the field of gold recovery, holding 2 patents that showcase his innovative approaches to processing precious metals. His work is particularly relevant in the mining industry, where efficient recovery methods are crucial.

Latest Patents

Marchbank's latest patents include groundbreaking processes for gold recovery from refractory carbonaceous ores. One of his patents details a method for treating precious metal ores in which gold is leached from an oxidized ore slurry using a thiosulfate salt lixiviant and copper catalyst. In this process, gold and copper are subsequently loaded onto an ion exchange resin. Copper is recovered from the resin by elution with a thiosulfate solution, while gold is recovered by elution with a thiocyanate solution. The final step involves recovering gold from the eluate through precipitation, electrowinning, or cementation.

Another significant patent focuses on recovering gold from refractory sulfidic and carbonaceous ores. This process involves subjecting an ore slurry to pressure oxidation in an autoclave. The oxidized ore slurry is then mixed with a thiosulfate salt lixiviant, maintained at a pH between 7 and 8.7, and agitated in a stirred tank reactor system. Gold is ultimately recovered from the gold-bearing leachate through cementation, adsorption on an adsorbent, or cyanidation.

Career Highlights

Marchbank is currently associated with Barrick Gold Corporation, a leading company in the mining sector. His expertise in gold recovery processes has positioned him as a valuable asset within the organization. His innovative methods have the potential to enhance the efficiency and effectiveness of gold extraction, contributing to the company's success.

Collaborations

Throughout his career, Marchbank has collaborated with notable colleagues, including Kenneth G Thomas and Christopher Andrew Fleming. These partnerships have likely fostered an environment of innovation and shared knowledge, further advancing the field of gold recovery.

Conclusion

Andrew R Marchbank's contributions to gold recovery processes demonstrate his commitment to innovation in the mining industry. His patents reflect a deep understanding of the complexities involved in precious metal extraction, and his work continues to influence the field positively.