Patent ID: 8382962
Filing Date: 2013-02-26
Classification: C07B,C07C,C07D

Abstract:
1. A method of distilling an ionic liquid, comprising: distilling an ionic liquid to obtain a distillate, wherein said ionic liquid comprises a mixture of salts having a melting point of less than 200° C. at 1 bar the cation of the ionic liquid comprises a heterocyclic ring system having at least one nitrogen atom and all nitrogen atoms of the heterocyclic ring system have an organic group as substituent, the anion of the ionic liquid is a compound having at least one carboxylate group or at least one phosphate group and the distance from the vaporizer surface via which the heat of distillation is introduced in the distilling to the condenser surface at which condensation takes place is less than 50 cm at at least one point, with the vaporizer surface and condenser surface themselves having at least one length dimension of greater than 50 cm.