B01D 53/501
By treating the gases with a solution or a suspension of an
Official title: {by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound}
B01D53/501 (By treating the gases with a solution or a suspension of an) appears on 1,275 US grants and 705 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,275
- Published applications
- 705
- Assignees
- 568
- Inventors
- 2,229
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 37 | 0 |
| 1977 | 22 | 0 |
| 1978 | 23 | 0 |
| 1979 | 25 | 0 |
| 1980 | 36 | 0 |
| 1981 | 23 | 0 |
| 1982 | 25 | 0 |
| 1983 | 25 | 0 |
| 1984 | 20 | 0 |
| 1985 | 29 | 0 |
| 1986 | 39 | 0 |
| 1987 | 25 | 0 |
| 1988 | 20 | 0 |
| 1989 | 34 | 0 |
| 1990 | 24 | 0 |
| 1991 | 24 | 0 |
| 1992 | 15 | 0 |
| 1993 | 31 | 0 |
| 1994 | 19 | 0 |
| 1995 | 22 | 0 |
| 1996 | 31 | 0 |
| 1997 | 42 | 0 |
| 1998 | 29 | 0 |
| 1999 | 14 | 0 |
| 2000 | 25 | 0 |
| 2001 | 26 | 3 |
| 2002 | 13 | 11 |
| 2003 | 18 | 15 |
| 2004 | 16 | 19 |
| 2005 | 9 | 12 |
| 2006 | 3 | 18 |
| 2007 | 8 | 13 |
| 2008 | 10 | 24 |
| 2009 | 17 | 24 |
| 2010 | 21 | 36 |
| 2011 | 21 | 31 |
| 2012 | 22 | 39 |
| 2013 | 31 | 38 |
| 2014 | 45 | 47 |
| 2015 | 34 | 44 |
| 2016 | 31 | 49 |
| 2017 | 36 | 43 |
| 2018 | 43 | 42 |
| 2019 | 54 | 45 |
| 2020 | 44 | 50 |
| 2021 | 34 | 26 |
| 2022 | 36 | 26 |
| 2023 | 17 | 19 |
| 2024 | 11 | 13 |
| 2025 | 9 | 9 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flue gas purification system for hazardous waste incineration and purification method25 Aug 2026US 12,714,969 B2Chongqing Greening Environmental Protection Co. Ltd
- Method of elimination of poly- and perfluoroalkyl substances (PFAS) in a wastewater biosolids gasification process using a thermal oxidizer and hydrated lime injection9 Jun 2026US 12,649,885 B2Aries Clean Technologies LLC
- Method for capturing carbon dioxide and nitrogen oxides in flue gas and conversion thereof to carbon source and nitrogen source needed for algae growth31 Mar 2026US 12,589,355 B2
- Desulfurization and sulfur recovery method for sulfur dioxide flue gas31 Mar 2026US 12,589,356 B2TongLing Nonferrous Metals Group Holdings Co. Ltd.
- Method for simultaneously removing high-load sulfur dioxide and nitrogen oxide in waste gas10 Mar 2026US 12,569,807 B2Nanjing University
- Cooling tower, carbon dioxide capture device, and method for treating surface of packing20 Aug 2026US 2026/0241340 A1Mitsubishi Heavy Industries, Ltd.
- Method and system for cleaning polluted marine exhaust gas cleaning liquid20 Aug 2026US 2026/0242265 A1Alfa Laval Corporate AB
- Apparatus and method for pollutant removal6 Aug 2026US 2026/0225029 A1Daphne Solutions SA
- Advanced membrane oxidation process and system for the treatment of industrial gas emissions and odors23 Jul 2026US 2026/0208099 A1
- Method for electrocatalytic synergistic treatment of industrial sulfur-containing flue gas and conversion of PET waste plastics into hydroxymethanesulfonate25 Jun 2026US 2026/0176775 A1Beijing University of Technology
Most cited
By later US patents
- Removal of sulfur dioxide from process gas using treated oil shale and water278US 4,093,026 AOccidental Oil Shale, Inc. · 1978
- Two-stage removal of sulfur dioxide from process gas using treated oil shale208US 4,140,181 AOccidental Oil Shale, Inc. · 1979
- System and method for sequestration and separation of mercury in combustion exhaust gas aqueous scrubber systems182US 7,722,843 B12010
- Methods for removing air pollutants from combustion flue gas143US 5,670,122 AEnergy and Environmental Research Corporation · 1997
- Flue gas control system of coal combustion boiler and operating method thereof122US 8,071,060 B2Mitsubishi Heavy Industries, Ltd. · 2011