| 摘要 |
PURPOSE:To obtain lactone in suppressed side reaction and high selectivity by subjecting a diol having at least one primary hydroxyl group to vapor phase dehydrogenation reaction using a dehydrogenation catalyst consisting of copper, zinc and alkali metal. CONSTITUTION:A diol (e.g. 1,4-butane diol) having a primary hydroxyl group is subjected to vapor phase dehydrogenation reaction using a catalyst consisting of copper, zinc and alkali metal at 170300 deg.C to provide the lactone compound (e.g.; gamma-butylolactone) useful for solvent, chemical speciality raw material, resin raw material, etc. The above-mentioned catalyst consists of 20-60% (as copper oxide) zinc, 30-95% (as Zinc oxide) zinc and 10010000ppm alkali metal and is preferably prepared by absorbing an alkali metal ingredient as a diluted solution into a CuO-ZnO catalyst obtained by coprecipitation of copper salt and zinc salt, followed by filtration, water washing, drying, molding and calcining. |
