A process for the regeneration of a catalyst

The invention relates to a process for the regeneration of catalysts containing mixed oxides from the group of alkali and / or alkaline earth metals, aluminum and silicon, characterized in that the regeneration comprises the following features: i) treating the catalyst in situ, ii) contacting the catalyst with water, iii) treatment of the catalyst in a temperature range of 100 to 400 ° C, iv) treating the catalyst in a pressure range of 0.1 to 2 MPa, v h) treatment of the catalyst over a period of 0.1 to 24, vi) treating the catalyst with a specific catalyst loading of 0.1 to 100 h