B01D 3/32
Other features of fractionating columns
Official title: Other features of fractionating columns {; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30}
B01D3/32 (Other features of fractionating columns) appears on 716 US grants and 646 published applications in this corpus.
Search patents in B01D- Granted patents
- 716
- Published applications
- 646
- Assignees
- 339
- Inventors
- 1,534
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 10 | 0 |
| 1978 | 9 | 0 |
| 1979 | 10 | 0 |
| 1980 | 7 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 11 | 0 |
| 1998 | 18 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 2 |
| 2002 | 11 | 11 |
| 2003 | 17 | 11 |
| 2004 | 8 | 24 |
| 2005 | 11 | 18 |
| 2006 | 12 | 10 |
| 2007 | 13 | 10 |
| 2008 | 10 | 7 |
| 2009 | 14 | 29 |
| 2010 | 4 | 10 |
| 2011 | 14 | 17 |
| 2012 | 9 | 21 |
| 2013 | 15 | 23 |
| 2014 | 19 | 36 |
| 2015 | 19 | 30 |
| 2016 | 19 | 31 |
| 2017 | 39 | 43 |
| 2018 | 34 | 42 |
| 2019 | 51 | 55 |
| 2020 | 42 | 30 |
| 2021 | 37 | 41 |
| 2022 | 28 | 40 |
| 2023 | 36 | 33 |
| 2024 | 27 | 31 |
| 2025 | 21 | 16 |
| 2026 | 10 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recovering mono-ethylene glycol8 Sep 2026US 12,729,173 B2Changchun Meihe Science and Technology Development Co., Ltd.
- Method for purifying a feedstock resulting from a method for depolymerizing styrene compounds11 Aug 2026US 12,703,670 B2Compagnie Generale Des Etablissements Michelin
- Integrated stabilizer in deisobutanizer for isomerization of hydrocarbons and product separation4 Aug 2026US RE50,978 E1Kellogg Brown & Root LLC
- System and method for enhanced ethanol production14 Jul 2026US 12,679,794 B2ICM, Inc.
- Apparatuses and processes for distillation and distillation column assembly5 May 2026US 12,616,950 B2Air Prodcuts and Chemicals, Inc.
- 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.
- Process for fractionating a stream10 Sep 2026US 2026/0263962 A1Uop LLC
- Simplified ethylene oxide purification methods10 Sep 2026US 2026/0265210 A1Dow Global Technologies LLC
- Methods for optimization of distillation column for reduction of energy consumption27 Aug 2026US 2026/0249208 A1Sabic Global Technologies B.V.
Most cited
By later US patents
- Hydrous alcohol distillation method and apparatus148US 4,306,942 ARaphael Katzen Associates International, Inc. · 1981
- Distillative separations of gas mixtures containing methane, carbon dioxide and other components129US 4,462,814 AKoch Process Systems, Inc. · 1984
- Cryogenic distillative separation of acid gases from methane111US 4,318,723 AKoch Process Systems, Inc. · 1982
- Apparatus for separating organic liquid solutes from their solvent mixtures103US 4,375,387 ACritical Fluid Systems, Inc. · 1983
- Fractionation process with power generation by depressurizing the overhead vapor stream95US 4,471,619 AUop LLC · 1984