Preparation method of catalyst for preparing methyl glycolate through selective hydrogenation of dimethyl oxalate

• Main Authors: WANG YUNKAI, SAN AKIHIRO, XU WENJIAN, MENG DAN, ZHANG HONGJIE, CHEN SHULE, ZHANG MEILING
• Format: Patent
• Language: Chinese; English
• Published: 05.08.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a preparation method of a catalyst for preparing methyl glycolate through selective hydrogenation of dimethyl oxalate, and relates to a preparation method of a catalyst. The preparation method of the catalyst comprises the following steps: firstly, preparing the main active component and the auxiliary active component into a salt-ammonia complex by adopting a precipitant, wherein the precipitant is ammonia water, urea and ammonium bicarbonate; alkoxy silane, high-purity fumed silica and high-purity silicon powder are used as silicon sources to be added into the complexing solution; the catalyst is prepared by the following steps: heating to remove ammonia, drying at 120 DEG C for 12 hours, and roasting at 450-750 DEG C for 4 hours, and the loading capacity of the active component is 0-25% (weight). When the catalyst is used, under the reaction conditions that the temperature is 200 DEG C, the pressure is 3 MPa and the liquid hourly space velocity is 2.1 gDMO/(gcata.h), the conversion r