GTBE – Glycerol tertiary butyl ether

The invention relates to a new process for the continuous production of glycerol-tertiary-butyl-ether (GTBE) by

etherification of glycerol and isobutene. In this case the reaction management is selected so that the process has clear economic advantages over alternative processes. Commercial Opportunity GTBE is suitable as antiknock additive for petrol. Since lead additives are prohibited, methyl-tertiary-butyl- ether (MTBE) is mainly used here, but this is hazardous to the environment and has already been partially prohibited in the USA. In contrast, GTBE is much more readily biodegradable. Moreover, large amounts of glycerol are formed in the production of biodiesel and currently only small proportions of this are being further processed chemically today. As a result of the conversion to GTBE it can once again be added to petrol as well as to biodiesel.

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