アルミナ充填層反応装置によるジアミンとグリコールの反応 : KOH 添加による触媒酸性度, 細孔構造の変化に関して

概要

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Piperazine and pyrazine derivatives were obtained by the dehydration of diamine and glycol on the alumina-packed bed reactor. After examination of various catalysts, alumina catalyst was found to be more active than the silica-alumina or zeolite catalyst. Addition of a promoter (K_2O) increased the yield of piperazine by suppressing the decomposition of glycol. K_2O decreased the catalyst acidity, which was measured by the butylamine absorption method. More than 7% K_2O addition decreased the yield of piperazine and changed the pore size distribution. Namely, the excessive alkali breaks micropores of the catalyst. This catalyst (alumina+K_2O) was found to be applicable for preparation of triethylenediamine and 2-methylhomopiperazine.
公益社団法人日本薬学会の論文
1978-01-25