Desulfurizing in a delayed coking process
US5045177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Aug 15, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G70/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improvement has been found in the gas recovery section of a delayed coking process. In the improvement the compressor discharge is amine scrubbed to remove hydrogen sulfide. The compressor discharge is the entire vapor feed to the gas recovery section and contains about 90% of the hydrogen sulfide. This has been found to cause a significant drop in both the depropanizer and debutanizer pressure and allow a saving in the investment cost of the pressure vessel. Synergistically a reduced amount of hydrogen sulfide is present in the entire gas recovery section. The remaining 10% of the hydrogen sulfide is removed by amine scrubbing the fuel gas and propane/propylene fractions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.