B01D 3/40
Extractive distillation
B01D3/40 (Extractive distillation) appears on 410 US grants and 338 published applications in this corpus.
Search patents in B01D- Granted patents
- 410
- Published applications
- 338
- Assignees
- 218
- Inventors
- 938
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 0 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 8 | 0 |
| 1985 | 9 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 21 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 3 | 5 |
| 2004 | 3 | 4 |
| 2005 | 3 | 3 |
| 2006 | 2 | 2 |
| 2007 | 3 | 5 |
| 2008 | 3 | 1 |
| 2009 | 2 | 7 |
| 2010 | 2 | 10 |
| 2011 | 7 | 6 |
| 2012 | 5 | 10 |
| 2013 | 12 | 15 |
| 2014 | 13 | 16 |
| 2015 | 9 | 22 |
| 2016 | 15 | 14 |
| 2017 | 11 | 14 |
| 2018 | 17 | 25 |
| 2019 | 28 | 33 |
| 2020 | 28 | 25 |
| 2021 | 20 | 25 |
| 2022 | 18 | 27 |
| 2023 | 24 | 21 |
| 2024 | 18 | 22 |
| 2025 | 14 | 7 |
| 2026 | 7 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Latent heat and condensation exchanger11 Aug 2026US 12,704,076 B2Sustainable Energy Solutions, LLC
- Process for the recovery of low-boiling point components from an ethanol stream7 Jul 2026US 12,674,183 B2Braskem S/A
- Co-production of high purity isobutylene and high purity isooctene24 Mar 2026US 12,583,805 B2Lummus Technology Inc.
- Processes and cataylsts for the selective hydrogenation of compounds having carbonyl carbon atoms24 Mar 2026US 12,583,831 B2Archer Daniels Midland Company
- Production system, production method and application of general-purpose high-purity chemicals3 Feb 2026US 12,539,471 B2Beijing University of Chemical Technology
- Process for the recovery of low-boiling point components from an ethanol stream1 Oct 2026US 2026/0297630 A1Braskem S/A
- Process for the recovery of low-boiling point components from an ethanol stream1 Oct 2026US 2026/0297631 A1Braskem S/A
- Dimethyl ether (dme) synthesis13 Aug 2026US 2026/0234086 A1Lummus Technology Inc.
- Method for preparing isopropyl alcohol13 Aug 2026US 2026/0234088 A1LG Chem.Ltd.
- Azeotropic extractive distillation for enhanced methanol refinement13 Aug 2026US 2026/0234090 A1Lummus Technology Inc.
Most cited
By later US patents
- Separation of ethyl acetate from ethanol and water by extractive distillation156US 4,379,028 A1983
- Low energy extractive distillation process for producing anhydrous ethanol152US 5,035,776 AUniversity of Massachusetts · 1991
- Separation of ethanol mixtures by extractive distillation105US 6,375,807 B12002
- Apparatus for separating organic liquid solutes from their solvent mixtures103US 4,375,387 ACritical Fluid Systems, Inc. · 1983
- Process for recovering alcohol with energy integration103US 5,215,902 AGeorgia Tech Research Corporation · 1993