Patent ID: 6814945
Filing Date: 2004-11-09
Classification: B01J,Y10S

Abstract:
A catalyst dumping method for unloading used catalyst from an inside of a reactor, comprising the steps of:providing a catalyst dumping-out member inside the reactor extending substantially axially inside the reactor and further extending from the inside of the reactor to an outside the reactor, the catalyst dumping-out members having a plurality of pipe members connected with each other to form an opening and discharge passage for a smashed catalyst thereinside; smashing the catalyst; throwing the smashed catalyst into an uppermost pipe member; while continuing the smashing and throwing steps, detaching the connected pipe members sequentially from an upper pipe member in accordance with lowering of a level of an upper surface of the catalyst; and continuing to throw the smashed catalyst into the pipe member of corresponding level of the upper surface of the catalyst, thereby unloading the catalyst inside the reactor.