Process for producing gamma-butyrolactone by catalytic hydrogenation of maleic acid, fumaric acid and/or succinic acid esters.

摘要

gamma -Butyrolactone is prepared by hydrogenating maleic, fumaric or succinic esters or mixtures thereof in the presence of copper chromite catalysts, preferably barium-containing copper chromite catalysts, in the liquid phase at a hydrogen pressure of 1 to 12 bar and temperatures of 180 to 260 DEG C.