反应详情

温度

145 °C

100 g of limonenemonoaldehyde (4-methylcyclohex-3-ene-β-methylpropanal), 300 ml of cyclohexane and 0.1 g of dimeric rhodium carbonyl-chloride were introduced into a stainless steel autoclave of 700 ml capacity and were heated to 145° C. under water gas (CO/H2), while stirring. The pressure was kept between 200 and 220 bar by regularly forcing in more water gas. After 2 hours, the pressure remained constant. The autoclave was cooled and let down and the reaction mixture was separated into its components by thin film distillation. 75 g of limonenedialdehyde (4-methyl-3-formylcyclohexane-β-methylpropanal) were obtained at 150° C. under 0.05 mbar, corresponding to a selectivity of 75%.

1. temperatureThe autoclave was cooled
2. customthe reaction mixture was separated into its components by thin film distillation