| 摘要 |
PURPOSE:To prevent reduction in catalytic activity in directly carbonylating the title compound in the presence of a rhodium compound by irradiation with light rays by treating an extracted formed reaction solution with carbon monoxide having higher pressure than CO pressure of the reaction process and circulating the treated solution. CONSTITUTION:Aromatic hydrocarbons are reacted with CO in the presence of a Rh compound by irradiation with light rays, the formed reaction solution is at least partially extracted and treated with CO having higher pressure than CO pressure of the reaction process to regenerate and reactivate the Rh compound contained in the formed reaction solution. Then the treated solution is circulated to the reaction process and various kinds of useful compounds such as aldehyde, alcohol, ketone, carboxylic acid, dehydrogenated condensate, etc., are directly and efficiently obtained from the raw materials under a mild condition while maintaining a highly catalytic activity for many hours. In the above-mentioned retreating process, during or after treatment with CO, an organic phosphine compound is added and after the re-treatment, the excess organic phosphine compound may be removed. |
