Patent ID: 8158822
Filing Date: 2012-04-17
Classification: C07C

Abstract:
1. A process for producing potassium formate having a purity of more than 99% comprising: reacting formaldehyde, potassium hydroxide, and isobutyraldehyde at a molar ratio between 1.0:1.0:1.0 and 3.0:2.0:1.0 and at a temperature ranging from 0 to 100° C. to form a reaction solution; neutralizing the reaction solution to a pH ranging from 4 to 6 and evaporating it to yield a solution having a water phase and an organic phase; evaporating the water phase at a pressure ranging from 0 to 1 bar and at a temperature ranging from 160 to 250° C. to yield a melt of potassium formate; adding water to said melt and filtering through a coal filter to provide a potassium formate solution containing potassium formate having a purity of more than 99% calculated on a water-free basis.