Synthesis of Cyclopentyl Methyl Ether by Gas Phase Catalytic Reaction Using Strong Acid Ion Exchange Resin as a Catalyst -Study of Catalyst Deactivation Mechanism-

摘要

Catalyst life was studied for developing a process for producing cyclopentyl methyl ether by continuous gas phase addition of cyclopentene and methanol using a strongly acidic ion exchange resin as a catalyst. Activity of the catalyst was found to decrease with time. C5 diolefins were indicated to form deactivation factor substances by analysis of substances deposited on the spent catalyst, analysis of behaviors of trace impurities before and after reaction, and other findings. Catalyst lifetime test using feedstock containing no C5 diolefins showed that deactivation of catalytic activity was greatly suppressed. The mechanism of catalyst deactivation is discussed based on the results of experiments reproducing tar formation, accelerated deactivation visualizing the inside of the reaction tube, and others.