| 摘要 |
<p>Heterogeneous catalytic reactions are carried out continuously in liquid phase. To this end, a suspension of liquid starting material and particulate catalyst together with resulting reaction product is continuously conveyed upwardly in a reaction zone by the introduction, in accordance with the principle of an air-lift pump, of a gas near the bottom of the reaction zone, and recycled downwardly through a reflux line to the bottom of the reaction zone, the path of liquid material through the reflux line being interrupted by an injector system situated in a closed catalyst-separating zone containing recycle liquid; following establishment of the reaction equilibrium, starting material is continuously supplied to the reaction zone and crude, catalyst-free recycle liquid is continuously removed near the head of the catalyst-separating zone, and recycle liquid which is to be removed is caused to travel through the catalyst-separating zone with the injector system therein towards the recycle liquid outlet at a velocity smaller than the sedimentation velocity of the catalyst under the operational conditions prevailing.</p> |
