Process for the preparation of monolithic structures catalyst used in the synthesis of the dialkyl oxalate with CO gas phase coupling, and a manufacturing method of the dialkyl oxalate

摘要

[Problems] The present invention provides for the use and process for its preparation and a monolithic catalyst structure used for the synthesis of oxalate by CO gas phase coupling. The carrier and the skeleton metal honeycomb or ceramic honeycomb, and a wash coat layer of metal oxide, and an active ingredient a noble metal Pt, Pd, Ir, and Rh, monolithic structures catalysts of the present invention comprises, Fe, Co , I and aid Ni. The wash coat layer, accounted for 5-50% of the honeycomb carrier, accounting for 0.1 to 5 wt% of the washcoat layer, the auxiliaries of the catalyst active component of the catalyst, 0.3 washcoat layer accounts for 10 wt%, the atomic ratio of active ingredient to aid is 0.1 to 3. The synthesis reaction of oxalic acid salt, and a carrier gas _{N 2, 2 N: 5~60::} volume ratio = 20 to 80 of the alkyl nitrite: CO 10~40, dwell time is 0.5 to 10 seconds, is performed in a fixed bed reactor.