Process for the preparation of di-tert-butyl succinate

摘要

A process for the preparation of di-tert-butyl succinate of formula by proton-catalysed esterification of succinic acid with isobutene, which comprises reacting succinic acid or succinic acid anhydride, or mixtures thereof, with isobutene in the presence of a water-containing acid esterification catalyst, with the proviso that sulfuric acid is used in a concentration of not more than 95% by weight. By this process it is possible to prepare di-tert-butyl succinate by reacting succinic acid or succinic acid anhydride, or corresponding mixtures of succinic acid and succinic acid anhydride, with isobutene butene with reduced evolution of heat and at the same time with increased yield and improved purity of the end product.