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4-甲基环己酮作为一种优良的有机溶剂及有机合成中间体,在微电子工业及医药、香料、精细化工合成中有很重要的用途。文献报道的各种制备方法中,以对甲酚为原料经催化氢化制备4-甲基环己酮有实际意义。但催化氢化大多在加压情况下进行,所用催化剂多为钯,也有用钉、铑或莱尼镍作催化剂的,但加氢产物多为甲基环己醇,且酮的收率很低。本文采用铑催化剂(以氧化铝作载体),实现了对甲酚的常压催化氢化,制得4-甲基环己酮,并对催化条件作了初步摸索和探讨。
As an excellent organic solvent and organic synthesis intermediates, 4-methylcyclohexanone has very important applications in the microelectronics industry, pharmaceuticals, perfumery and fine chemical synthesis. Among the various preparation methods reported in the literature, it is of practical significance to prepare 4-methylcyclohexanone by catalytic hydrogenation of p-cresol as a raw material. However, most of the catalytic hydrogenation is carried out under pressure, the catalyst is mostly palladium, but also useful nail, rhodium or nickel as a catalyst, but mostly hydrogenated product methylcyclohexanol, and ketone yield is very low. In this paper, rhodium catalyst (alumina as a carrier), to achieve the normal pressure of cresol hydrogenation, 4-methyl cyclohexanone obtained, and the catalytic conditions were initially explored and discussed.