Liquid phase conversion of a source of sulfur dioxide to sulfuric acid
US5788949A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Jun 26, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing in liquid phase, concentrated sulfuric acid in the liquid phase from a source of sulfur dioxide, is described. The process comprises, converting the source of sulfur dioxide to sulfuric acid. The liquid phase, comprises: PA1 a) nitric acid at a sufficient concentration to commence conversion in the presence of oxygen, of sulfur dioxide into sulfuric acid in the initial absence of sulfuric acid, PA1 b) nitric acid at a sufficient concentration to maintain conversion of sulfur dioxide in the presence of sulfuric acid either generated by said conversion or present at commencement of said conversion, and PA1 c) combined concentration of nitric acid and sulfuric acid ranging from 5M to 16M where the concentration of nitric acid is at least 5M in the initial absence of sulfuric acid, and a source of oxygen is introduced to the aqueous phase at a concentration sufficient to provide for such catalytic conversion of SO.sub.2 to H.sub.2 SO.sub.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.