| 摘要 |
<p>In the hydrogenation of phenol using H2 on Pd-support catalysts, the ratio of the resulting products, cyclohexanone and cyclohexanol, can be predetermined by specially treating the catalysts, at their initial activation and regeneration, with an O2 pretreatment and an H2 treatment, the following time-temperature conditions being employed: a) cyclohexanone:cyclohexanol = 85:15 to 98:2 a1) for the initial activation, no O2 pretreatment and H2 treatment for 50-10 h at 300-500@C; a2) for the regeneration, O2 pretreatment for 30-0.5 h at 220-380@C and H2 treatment for 2-6 h at 150-250@C; b) cyclohexanone:cyclohexanol = 30:70 to below 85:15 b1) for the initial activation, O2 pretreatment for 40-3 h at 250-500@C and H2 treatment for 2-6 h at 150-250@C; b2) for the regeneration, O2 pretreatment for 30-0.5 h at 380-600@C and H2 treatment for 2-6 h at 150-250@C.</p> |
