Structured catalyst for synthesizing oxalate by CO gaseous-phase coupling and preparation method thereof

Abstract

The invention provides a structured catalyst for synthesizing oxalate by CO gaseous-phase coupling and a preparation method thereof. In the catalyst, a ceramic honeycomb or metal honeycomb is used as a skeletal carrier, the aluminum oxide, silicon oxide and titanium oxide and the like are used as carrier coatings, precious metals such as Pt, Pd, Ir, Rh and the like are used as active ingredients, and Fe, CO, Ni and the like are used as additives, wherein the carrier coating accounts for 5 to 50 percent of the weight of the honeycomb carrier; the active ingredients of the catalyst account for 0.1 to 5 percent of the weight of the carrier coating; the additives of the catalyst account for 0.3 to 10 percent of the weight of the carrier coating; and the atomic ratio of the active ingredients to the additives is 0.1 to 3. In the structured catalyst of the invention, the active ingredients are limited in the carrier coating, so that the using amount of the precious metal Pd is reduced. Meanwhile, the structured catalyst and the preparation method thereof reduce the loss of the catalyst caused by wear in the processes of catalyst filling and using, reduce the using cost of the catalyst and the production cost of the oxalate, and contribute to realize the large-scale industrial production.

Description

technical field [0001] The invention relates to the synthesis of oxalate, in particular to a regular catalyst for synthesizing oxalate by CO gas phase coupling and a preparation method thereof. Background technique [0002] In view of the current situation of more coal and less oil in my country, using coal or natural gas instead of petroleum ethylene to synthesize ethylene glycol technology is a major C1 chemical technology with the most scientific raw material route and the most reasonable resource utilization, which is obviously superior to the petroleum route. Oxalate is one of the important intermediate products, and its synthesis is of great significance to the realization of my country's strategic goal of "replacing petroleum ethylene with coal or natural gas to synthesize ethylene glycol". In addition, oxalate is also an important organic chemical raw material, which is widely used in the fine chemical industry to prepare various dyes, medicines, important solvents, ...

AI Technical Summary

Problems solved by technology

In recent years, many scholars at home and abroad have made some progress in the selection of catalysts, activity and carrier effects, and process operating conditions, and believe that α-Al 2 o 3 etc. are more suitable catalyst supports, but the use of noble metal Pd as the active component of the catalyst increases the production cost of oxalate

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