B01D 3/141
Where at least one distillation column contains at least one dividing wall
Official title: {where at least one distillation column contains at least one dividing wall}
B01D3/141 (Where at least one distillation column contains at least one dividing wall) appears on 331 US grants and 342 published applications in this corpus.
Search patents in B01D- Granted patents
- 331
- Published applications
- 342
- Assignees
- 112
- Inventors
- 744
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 3 |
| 2002 | 14 | 3 |
| 2003 | 11 | 13 |
| 2004 | 5 | 17 |
| 2005 | 7 | 7 |
| 2006 | 11 | 11 |
| 2007 | 7 | 5 |
| 2008 | 8 | 6 |
| 2009 | 7 | 5 |
| 2010 | 5 | 12 |
| 2011 | 4 | 13 |
| 2012 | 11 | 15 |
| 2013 | 9 | 13 |
| 2014 | 17 | 23 |
| 2015 | 16 | 17 |
| 2016 | 15 | 18 |
| 2017 | 15 | 21 |
| 2018 | 26 | 21 |
| 2019 | 24 | 22 |
| 2020 | 30 | 23 |
| 2021 | 18 | 13 |
| 2022 | 10 | 15 |
| 2023 | 7 | 10 |
| 2024 | 9 | 12 |
| 2025 | 7 | 7 |
| 2026 | 5 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat integration via heat pump on bottom dividing wall column6 Oct 2026US 12,752,216 B2Sulzer Management AG
- Method for purifying a feedstock resulting from a method for depolymerizing styrene compounds11 Aug 2026US 12,703,670 B2Compagnie Generale Des Etablissements Michelin
- Separation process for the production of C5 or C6 alkanediol26 May 2026US 12,637,401 B2Johnson Matthey Davy Technologies Limited
- Integration of naphtha to ethane and propane fractionation section with ethane steam cracker12 May 2026US 12,623,981 B2Uop LLC
- Process to prepare feed by using dividing wall column and/or conventional column for catalytic cracking unit targeting olefin production13 Jan 2026US 12,522,769 B2Kellogg Brown & Root LLC
- A method and plant for purifying ethylene carbonate8 Oct 2026US 2026/0308138 A1Sulzer Management AG
- Application of a bottom divided wall column (bdwc) with and without vapor recompression (vrc) to separate aromatic rich streams from the pyrolysis gasoline hydrogenation reactor1 Oct 2026US 2026/0297434 A1Lummus Technology Inc.
- Simplified ethylene oxide purification methods10 Sep 2026US 2026/0265210 A1Dow Global Technologies LLC
- Dimethyl ether (dme) synthesis13 Aug 2026US 2026/0234086 A1Lummus Technology Inc.
- Method for purifying isopropyl alcohol13 Aug 2026US 2026/0234087 A1LG Chem.Ltd.
Most cited
By later US patents
- Fractionation method and apparatus109US 4,230,533 APhillips Petroleum Company · 1980
- Carbon dioxide recovery process66US 5,335,504 AThe M. W. Kellogg Company · 1994
- Preparation of propene59US 6,646,172 B1BASF SE · 2003
- Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process57US 6,240,744 B1Air Products and Chemicals, Inc. · 2001
- Preparation of olefins49US 6,166,279 ABASF SE · 2000