Catalyst for preparing propylene from butylene and preparation method thereof

Abstract

The invention provides a catalyst for preparing propylene from butylene and a preparation method thereof. The preparation method comprises the following steps: mixing a CHA / AEI eutectic molecular sieve, a carrier raw material and sesbania cannabina powder, so that mixed powder is obtained; adding an inorganic acid solution into the mixed powder, and mixing; and mixing, kneading, carrying out extrusion moulding, drying at the temperature of 90-120 DEG C, and roasting for 2 hours at the temperature of 500-600 DEG C, so that the catalyst for preparing propylene from butylene is obtained. The catalyst for preparing propylene from butylenes, prepared by adopting the preparation method, can catalyze reaction for preparing propylene from butylene, and the propylene selectivity and yield are high.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for preparing propylene from butene and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Ethylene and propylene are important basic petrochemical raw materials. With the continuous development of the global economy, the demand for ethylene and propylene has been increasing. Therefore, countries around the world not only use existing technology to expand the production scale of ethylene and propylene, but also continue to explore and develop new ways, among which The production of propylene and ethylene using rich C4 olefins is a relatively promising process technology at present. [0003] my country's specific national conditions are that catalytic cracking occupies a considerable proportion in each refinery. For example, in 2004, the processing capacity of my country's catalytic cracki...

AI Technical Summary

Problems solved by technology

The first type often uses ZrO 2 , MgO, TiO 2 , Al 2 o 3 Equal loading of Ni, V, Fe, Cu, rare earth and other metals, but it is easy to coke, short service life, and there is a certain amount of CO / CO in the product 2 and other by-products, which are less economical

At present, most of the butene cracking processes use the second type of catalyst, and all the above-mentioned technologies use ZSM-5 or modified ZSM-5 molecular sieves. Although this type of catalyst has a long life, its olefin Low yield, poor selectivity, and high yield of heavy components, which is not conducive to atom economy