Process for removal of sulfur dioxide and ammonia from a vent gas stream
US11446602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2021 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | May 25, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/652
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
According to an embodiment of the invention, a process for substantially completely removing sulfur dioxide and ammonia from a gas stream is disclosed. The process involves lowering the vapor pressure in a scrubber by contacting the gas stream with one or more streams of re-circulating chilled media. The process further involves adjusting the pH of the process solution in the scrubber to within a predetermined range. The lowering of the vapor pressure and pH adjustment results in an increase in the solubility of sulfur dioxide and ammonia in the process solution thereby facilitating a substantially complete removal of sulfur dioxide and ammonia from the gas stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.