Process for producing gamma-butyrolactone.

摘要

According to this process, gamma-butyrolactone is produced by liquid phase catalytic hydrogenation of maleic anhydride with hydrogen at elevated temperature and under pressure, in the presence of a catalyst containing nickel and palladium deposited on a support. …When the support material chosen is a support based on silica exhibiting a very high specific surface whose value can range from 50 m<2>/g, preferably from approximately 100 m<2>/g up to 800 m<2> and more, very high degrees of conversion are obtained, of the order of 90 to 98 mol%, together with excellent selectivities for gamma-butyrolactone, of 95 to 97 mol%.