Sulfur oxides control in catalytic cracking
US4166787A · kind A · utility
12Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1977 |
| Grant date | Sep 4, 1979 |
| Priority date | — |
| Expiry date | Dec 16, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/517
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The amount of sulfur oxides in flue gas evolved in a catalyst regenerator in a catalytic cracking system is lowered by incorporating into the cracking catalyst, before using the catalyst in the cracking system, finely divided, high surface area alumina which has been calcined at 700.degree.-1600.degree.0 F. before incorporation into the catalyst. Sulfur oxides react with the calcined alumina in the regenerator to form a sulfur-containing solid. The sulfur-containing solid reacts with hydrocarbon to form fluid sulfur compounds in the FCC reactor, and the sulfur compounds exit the reactor mixed with the cracked hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.