B01D 2252/00
Absorbents, i.e. solvents and liquid materials for gas absorption
B01D2252/00 (Absorbents, i.e. solvents and liquid materials for gas absorption) appears on 2,365 US grants and 3,646 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,365
- Published applications
- 3,646
- Assignees
- 1,239
- Inventors
- 6,134
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 2 |
| 2005 | 1 | 5 |
| 2006 | 1 | 3 |
| 2007 | 3 | 1 |
| 2008 | 1 | 14 |
| 2009 | 7 | 9 |
| 2010 | 8 | 37 |
| 2011 | 14 | 110 |
| 2012 | 35 | 186 |
| 2013 | 89 | 190 |
| 2014 | 114 | 215 |
| 2015 | 128 | 246 |
| 2016 | 184 | 251 |
| 2017 | 181 | 232 |
| 2018 | 217 | 254 |
| 2019 | 229 | 226 |
| 2020 | 181 | 232 |
| 2021 | 184 | 231 |
| 2022 | 192 | 205 |
| 2023 | 164 | 249 |
| 2024 | 160 | 267 |
| 2025 | 155 | 285 |
| 2026 | 104 | 194 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2252/20Organic absorbentsIndexing code1,523
- B01D 2252/10Inorganic absorbentsIndexing code1,002
- B01D 2252/50Combinations of absorbentsIndexing code292
- B01D 2252/60AdditivesIndexing code248
- B01D 2252/30Ionic liquids and zwitter-ionsIndexing code185
- B01D 2252/40Absorbents explicitly excluding the presence of waterIndexing code22
Recent patents
- CO2 recovery system and CO2 recovery method6 Oct 2026US 12,752,235 B2Mitsubishi Heavy Industries, Ltd.
- Use of silica nanoparticles with triazine for H2S scavenging6 Oct 2026US 12,752,236 B2Nissan Chemical America Corporation
- Method and apparatus for producing carbonate salts22 Sep 2026US 12,741,880 B2Nanomist Technologies Co., Ltd.
- Drain discharge structure in compressed pneumatic circuit8 Sep 2026US 12,728,385 B2Fukuhara Co., Ltd.
- Pollutant capturer and mobilizer8 Sep 2026US 12,729,640 B2
- Filter system for the removal of volatile organosulfur compounds (voscs) from indoor air8 Oct 2026US 2026/0306980 A1Air Tech Group, SLU
- Absorbent for Capturing Carbon Dioxide8 Oct 2026US 2026/0307000 A1Panasia Co., Ltd.
- Catalytic reactor and system for purification of carbon dioxide streams and methods of using the same8 Oct 2026US 2026/0307007 A1Oxy Low Carbon Ventures, LLC
- Amino acid based carbon dioxide capture catalyzed with three-dimensional graphene8 Oct 2026US 2026/0307044 A1University of Wyoming
- Carbon dioxide absorbent, method for recovering carbon dioxide, and apparatus for separating and recovering carbon dioxide8 Oct 2026US 2026/0307045 A1Mitsubishi Gas Chemical Company, Inc.
Most cited
By later US patents
- Methods and configurations for acid gas enrichment156US 7,635,408 B2Fluor Technologies Corporation · 2009
- Method and apparatus for extracting carbon dioxide from air125US 7,708,806 B2Global Research Technologies, LLC · 2010
- Slagging coal combustor for cementitious slag production, metal oxide reduction, shale gas and oil recovery, enviromental remediation, emission control and CO2 sequestration77US 8,337,613 B22012
- Functional fluid and a process for the preparation of the functional fluid74US 8,080,225 B2Specialist Process Technologies Limited · 2011
- Functionalized ionic liquids, and methods of use thereof64US 7,208,605 B2University of South Alabama · 2007