CATALYST TREATMENT PROCESS FOR IMPROVING THE COLOUR OF ALKANOLAMINE

摘要

The invention relates to a process for the treatment of an alkanolamine, e.g. triethanolamine, having an improved colour stability over time. The process comprises contacting the alkanolamine with hydrogen in the presence of a supported catalyst comprising, as an active component, at least one metal chosen from Ni, Cu, Ru, Rh, Pd, Ag, Re, Os, Ir and Pt, and a, support component formed by heat treatment of a solid precursor based on a layered double hydroxide comprising at least one divalent metal cation and at least one trivalent metal cation, e.g. the hydrotalcite. The invention also relates to the use of a supported catalyst in a process for the treatment of an alkanolamine for improving the colour stability over time, the process comprising contacting the alkanolamine with hydrogen in the presence of the supported catalyst, as previously described.