Method for sequestering CO2 and SO2 utilizing a plurality of waste streams
US7922792B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Jul 26, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A neutralization/sequestration process is provided for concomitantly addressing capture and sequestration of both CO2 and SO2 from industrial gas byproduct streams. The invented process concomitantly treats and minimizes bauxite residues from aluminum production processes and brine wastewater from oil/gas production processes. The benefits of this integrated approach to coincidental treatment of multiple industrial waste byproduct streams include neutralization of caustic byproduct such as bauxite residue, thereby decreasing the risk associated with the long-term storage and potential environmental of storing caustic materials, decreasing or obviating the need for costly treatment of byproduct brines, thereby eliminating the need to purchase CaO or similar scrubber reagents typically required for SO2 treatment of such gasses, and directly using CO2 from flue gas to neutralize bauxite residue/brine mixtures, without the need for costly separation of CO2 from the industrial byproduct gas stream by processes such as liquid amine-based scrubbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.