Integrated process for regenerating fluorosulfuric acid catalyst
US4096198A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Feb 28, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An integrated process for regenerating a deactivated or partially deactivated alkylation catalyst comprising fluorosulfuric acid which comprises: PA1 (1) contacting said fluorosulfuric acid with water to form an acid-water mixture, thereby converting at least a portion of the fluorosulfuric acid therein to hydrogen fluoride and sulfuric acid; PA1 (2) removing at least a portion of the hydrogen fluoride from said acid-water mixture formed in step (1) by contacting same with a paraffin to form a gaseous phase containing hydrogen fluoride and said paraffin; PA1 (3) cooling the gaseous phase formed in step (2) by contacting with liquid paraffin to condense a portion of the fluorosulfuric acid present in said gaseous phase, thereby forming a liquid phase and a gaseous phase each containing fluorosulfuric acid and hydrogen fluoride; PA1 (4) treating the liquid and gaseous phases formed in step (3) with liquid sulfur trioxide to form a mixture comprising a liquid phase containing regenerated fluorosulfuric acid and a gas phase containing fluorosulfuric acid paraffin; PA1 (5) separating the mixture formed in step (4) so as to form a liquid phase containing regenerated fluorosulfuric acid a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.