Title:
METHOD OF REMOVING CATALYST
Document Type and Number:
Japanese Patent JP2602616
Kind Code:
B2
Abstract:
PURPOSE: To remove a catalyst efficiently, economically and for long period from a catalytic reaction product by passing the catalytic reaction product containing the solid catalyst through a hollow tubular filter medium which has a tapered pore distribution such that the pore size of the filter medium decreases in the direction of flow and is back washable.
CONSTITUTION: The method to remove a catalyst from a catalytic reaction product is executed by passing the catalytic reaction product containing the solid catalyst through a hollow tubular filter medium which comprises a nonwoven web of fibers, has a tapered pore distribution such that the pore size of the filter medium decreases in the direction of normal fluid flow, and is back washable. Thereby a sufficient amount is removed from the catalytic reaction so as to comprise an allowable level of catalytic impurity in the product. When the filter medium is stacked by a micro particle material, for example when a decrease of pressure in front and in the rear of the filter medium reaches a non allowable level the filter medium is back washed to remove the catalyst of the filter medium or a cake formed by a coagulation of other impurities.
Inventors:
Matthew Ruskin
Application Number:
JP18820493A
Publication Date:
April 23, 1997
Filing Date:
July 29, 1993
Export Citation:
Assignee:
Pall Corporation
International Classes:
B01D35/02; B01D37/00; B01D39/16; B01J20/28; B01D29/11; B01J25/04; B01J38/00; (IPC1-7): B01J38/00; B01D29/11; B01D35/02; B01D39/16
Domestic Patent References:
| JP60216818A | ||||
| JP6383031A | ||||
| JP5551439A | ||||
| JP49117423A | ||||
| JP57102237A |
Attorney, Agent or Firm:
Kyozo Yuasa (6 people outside)