Efficient furan preparation catalyst by furfural decarbonylation

Abstract

The invention provides a preparation method of a high-efficiency furfural decarbonylation catalyst for preparing furan, which comprises the steps as follows: active Al2O3 with the grain diameter of 1 to 6 mm is used as a carrier, Pd is used as a main active component with the content of 0.25 to 0.5 percent, and Ni and K with the content of 0.25 to 0.5 percent are used as catalytic addition agents. Traditional steeping methods are adopted for preparing the catalyst, and the prepared catalyst can be applied into gas furfural decarbonylation reaction. The results show that the catalyst prepared by the preparation method has better activity, achieves the furfural transformation rate of over 98 percent, and raises the selectivity to over 90 percent from an original level of about 70 percent.

Description

[0001] The invention relates to a preparation method of a furfural gas phase decarbonylation catalyst. Background technique [0002] For furfural decarburization catalysts, precious metals Pd, Pt, and Ru are commonly used, and their preparation process is often completed by loading them on a carrier. There is a report on liquid phase decarbonylation in US3007941, which provides the performance of Pd catalyst, which is more active than cesium, platinum, ruthenium and nickel. In the active cycle of catalyst, the furan output per gram of catalyst is defined as productivity, The calculated yield was 2100 g of furan per gram of catalyst. US3257417 uses active palladium catalyst to be loaded on potassium acetate to carry out liquid-phase decarbonylation, when activity reduces 10%, every gram of palladium produces 18g furan, Russian patent 342857, methyl furfural decarbonylation uses Group VIII metal catalyst, mainly palladium, The activity of rhodium was enhanced with alkali metals...

AI Technical Summary

Problems solved by technology

US3257417 uses active palladium catalyst to be loaded on potassium acetate to carry out liquid-phase decarbonylation, when activity reduces 10%, every gram of palladium produces 18g furan, Russian patent 342857, methyl furfural decarbonylation uses Group VIII metal catalyst, mainly palladium, The activity of rhodium was enhanced with alkali metals, and after 100 hours, 20 kg of methylfuran was produced per gram of palladium, but the space-time yield was not satisfactory

[0003] US4780552 kind of introduced that the used catalyst of furfural decarbonylation is platinum or / and rhodium or / and alkali metal, and reaction is carried out under the presence of hydrogen, and catalyst contains platinum or / and rhodium wherein also can add cesium, but the used preparation catalyst of this patent Raw materials are more expensive