Catalyst combustion regeneration process in downwardly moving bed with additional outlet responsive to gas flows
US4155877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1978 |
| Grant date | May 22, 1979 |
| Priority date | — |
| Expiry date | Mar 21, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/90
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Catalyst regeneration process and apparatus wherein air introduced to a midsection of a downwardly-moving mass of catalyst particles is taken off at the top and at the bottom of said bed through provided outlets and a third outlet is provided at the bottom portion of the said bed adapted to be controlled responsive to change in the flows through the top outlet and first mentioned bottom outlet to maintain substantially constant the total upward and downward flows through said bed. In an embodiment in which coke laydown on a hydrocarbon treated catalyst is burned off flue gases flow upwardly and out from the bed, e.g., through a carbon monoxide or flue gas burning boiler while downwardly flowing flue gas is taken off through a pressure control outlet or opening on which suction is taken by a blower passing flue gases to a boiler, a third outlet also flow controlled is operated responsive to change in the desired upward and downward flows of the flue gases. The third outlet, in operation of the regeneration system, can be normally closed or partly opened so that a condition of no flow or some flow, respectively, can exist.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.