Researchers Extracted Potassium and Rubidium from Feldspar
A new hydrothermal alkaline process successfully recovered essential elements from Rb-rich microcline.
Updated on Sept. 20, 2026 in Chemistry
Scientists have developed a hydrothermal alkaline technique to efficiently extract potassium and rubidium from Rb-rich microcline. The process utilizes KOH and Ca(OH) as additives to isolate these minerals while producing tobermorite as a byproduct.
Why it matters
This development offers a potential pathway for the integrated utilization of abundant feldspar resources. It enables the recovery of potassium while successfully enriching rubidium in the resulting alkaline solution.
The hydrothermal alkaline decomposition achieved 93.0% potassium extraction and 90.56% rubidium extraction. Tobermorite was identified as the dominant solid-phase product formed during the reaction.
The details
The research team investigated the hydrothermal alkaline decomposition of Rb-rich microcline by integrating quantitative liquid-phase composition analysis with crystallographic evolution of solid products. Using KOH and Ca(OH) as combined additives, the method successfully transformed the mineral into a useable alkaline solution and solid byproducts.
Timeline
The research findings were published in a scientific article on September 20, 2026.
The Big Picture
This work directly supports the ongoing research into the integrated utilization of feldspar resources by establishing a high-efficiency recovery method for key alkali metals. The findings represent a significant shift in how mineral waste or abundant silicate rocks can be repurposed for industrial applications.
The successful recovery of potassium and rubidium could lead to more efficient production of fertilizers and electronic components. Refining these extraction methods may eventually lower costs for industries reliant on stable mineral supplies.
The takeaway
This breakthrough demonstrates that complex minerals like microcline can be systematically dismantled into valuable high-purity components. The integration of mineral recovery with solid-phase byproducts like tobermorite highlights the potential for greener, closed-loop industrial processes.
Further reading
Learn more about the latest innovations in Chemistry and material extraction.
More information
View the complete results in the scientific research article access.
Source note: This article includes information reported by Nature.
