Potassium formate, HCO2K, HCOOK, or KHCO2, is the potassiumsalt of formic acid. This strongly hygroscopic white solid[2] is an intermediate in the formate potash process for the production of potassium.[3] Potassium formate has also been studied as a potential environmentally friendly deicing salt for use on roads.[4][5] It has also been suggested for use in a less corrosive liquid desiccant.[6] A 52% solution of potassium formate has a freezing point of −60 °C (−76 °F).[7] Potassium formate brines are sometimes used for heat transfer, despite being much more corrosive than many other liquid coolants, especially to zinc and aluminum but even to many steels,[8]
though some formulations are compatible with aluminum and steels.[9]
Since 1995, potassium formate has been increasingly used in aqueous Drilling fluids to increase density, stabilize the hole, and improve drilling performance.[10][11][12]
References
^Olsen, J C (editor), Van Nostrand's Chemical Annual, Chapman and Hall, London, 1934
^Pasi P. Hellstén; Jani M. Salminen; Kirsten S. Jørgensen & Taina H. Nystén (2005). "Use of potassium formate in road winter deicing can reduce groundwater deterioration". Environ. Sci. Technol. 39 (13): 5095–5100. Bibcode:2005EnST...39.5095H. doi:10.1021/es0482738. PMID16053115.
