CATALYST FOR ETHANOL PRODUCTION VIA HYDROGENATION OF OXALATE ESTERS AND PREPARATION METHOD AND USE THEREOF

摘要

Provided are a catalyst for ethanol production via hydrogenation of an oxalate and a preparation method and use thereof. The catalyst comprises a complex carrier consisting of zirconium oxide and silicon oxide, an active component copper, a first assistant and a second assistant. The first assistant is an oxide or metal of one or more elements of Mg, Ca, Ba, Mn, Fe, Co, Zn, Mo, La, and Ce, while the second assistant is an alkali metal; the weight percentage of each constituent in the catalyst is: 50-90 wt.% silicon oxide, 0.1-10 wt.% zirconium oxide, 10-50 wt.% active component copper, 0.1-10 wt.% of the first assistant, and 0.1-5 wt.% of the second assistant. After a copper-based catalyst powder body is obtained by using a sedimentation method, the catalyst is immersed by using an immersion method with the alkali metal as an assistant, thereby enhancing the ability of the copper catalyst to resist sintering. The catalyst has a high oxalate conversion rate in the reaction producing ethanol via hydrogenation of the oxalate, and also has a high selectivity for low carbon alcohol including ethanol; furthermore both the activity and selectivity are not obviously reduced after deterioration treatment, showing good stability at high temperatures.