Process and apparatus for dehydrogenating alkanes
US5365006A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/911
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An alkane-containing feedstream is passed through one or more tubes, which may contain alkane-dehydrogenation catalyst, immersed in a bed of fluidized particles. The bed is at an elevated temperature which maintains the temperature within the tube(s) at an alkane-dehydrogenation temperature. The particles may be inert, chemically active and/or catalytically active. In one embodiment, cracking catalyst particles are circulated between a reaction zone wherein they contact a cracker feedstock which is converted to cracked hydrocarbon products and a regenerator (22) wherein carbonaceous deposits on the catalyst particles are exothermically removed by contact with an oxygen-containing gas (24). Hot regenerated particles from the regenerator (22) are recirculated (27) to the reaction zone for re-use therein. At least some of the circulating cracking catalyst (33) is passed in indirect heat-exchange relationship (42) with an alkane-containing feedstream (44) within a tube (42) whereby alkanes are endothermically dehydrogenated to olefins and the cracking catalyst is cooled. Tube (42) contains a dehydrogenation catalyst, and the latter may be circulated between an alkane-dehydrogenation zo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.