Moving bed regeneration process with separate dispersion and chloriding steps
US5151392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1991 |
| Grant date | Sep 29, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G35/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for reforming hydrocarbons has a regeneration process for reconditioning catalyst particles containing platinum that improves the process by transferring the catalyst particles through a combustion zone, a drying zone, a redispersion zone and a chloride uptake zone. Drying of the catalyst particles immediately after the combustion of coke improves the operation of a platinum redispersion zone and a chloride uptake zone. Separate platinum redispersion zones and chloride uptake zones are provided so that the dried catalyst that enters the platinum redispersion zone can be contacted with a high concentration of chlorine with a lower overall concentration of chloride compounds in the redispersion zone. The lower moisture content allows the equilibrium reaction between hydrogen chloride and oxygen on the one hand, and water and chlorine on the other hand to be shifted to the production of chlorine. This shift of the equilibrium reaction can be further improved by maintaining an oxygen-enriched environment within the platinum redispersion zone. Conversely, the chloride uptake zone would have essentially all the chloride contained therein in the form of hydrogen chloride. Only a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.