Abstract

Bioleaching refers to the process of leaching valuable metals from minerals or other materials using microorganisms. It is widely used in metallurgy, mineral processing, chemical engineering and environmental engineering. This paper surveys the global patents in the field of bioleaching based on Soo PAT patent search and analysis. Results reveal that the worldwide bioleaching techniques show a decreasing trend after an initial increase but that the number of US patent applications is still in an advantageous position. The bioleaching field experienced a rapid development period in the early 20th century and then entered a stage of large-scale industrialization. The global research and development institutions with advantages in bioleaching-related patents are mainly concentrated in enterprises. Bioleaching is a multidisciplinary integrated field. Its related patents focus on the production and refining of metals in the field of chemical metallurgy. They are tightly associated with soil remediation, chemical or physical processes, and related equipment.

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Keywords: Bioleaching; Patent analysis; Soo PAT search; Development trends; Application