| 摘要 |
PURPOSE:To efficiently produce an unsaturated ketone useful as a perfume, medicine or raw material thereof and a high polymer raw material for photosensitive copolymer from formaldehyde and a ketone in high selectivity without using a mineral acid. CONSTITUTION:Formaldehyde is subjected to dehydrogenation condensation with a ketone expressed by formula I (R<1> and R<2> are H, 1-4C alkyl, phenyl or phenyl in which at least one site of benzene nucleus is replaced by 1-4C alkyl and/or halogen; (n) is 0 or 1) in the presence of a solid catalyst expressed by the formula P1XaOb (X is at least one kind of element selected from alkali metal, alkali earth metal, Y, La, Ce, Pr, Nd, Zr, Nb, B and Si; (a) and (b) are expressed by atomic ratio to P; (a) is 0.5-30; (b) is a number determined by value of (a) in a vapor phase. Thereby the objective unsaturated ketone expressed by formula IIa to formula IIc is obtained stably for long time in extremely high conversion and selectivity, compared with a method using a conventional catalyst. |
