Process for recovering metals and other chemical components from spent catalysts
US6117207A · kind A · utility
Inventor
Key dates
| Filing date | Jul 9, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Jul 9, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for recovering metal from spent catalyst, containing at least a metal component, comprising providing a heated, liquid metal bath, at a temperature sufficient to melt the metal in the spent catalyst, and create off gas from any volatile non-metal catalyst components, adding spent catalyst to the bath, collecting off gas from the bath, transporting the collected off gas to a gas cooler, and maintaining the off gas during the transportation at a temperature of at least about 875.degree. F.; rapidly cooling the off gas to less than about 275.degree. F. in no more than about 0.15 seconds, to prevent the formation of dioxin; and withdrawing melted metal from the bath, for reuse as catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.