B01D 3/14
Fractional distillation or use of a fractionation or rectification column
Official title: Fractional distillation {or use of a fractionation or rectification column}
B01D3/14 (Fractional distillation or use of a fractionation or rectification column) appears on 3,369 US grants and 3,225 published applications in this corpus.
Search patents in B01D- Granted patents
- 3,369
- Published applications
- 3,225
- Assignees
- 1,288
- Inventors
- 7,072
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 28 | 0 |
| 1978 | 22 | 0 |
| 1979 | 37 | 0 |
| 1980 | 33 | 0 |
| 1981 | 53 | 0 |
| 1982 | 44 | 0 |
| 1983 | 36 | 0 |
| 1984 | 33 | 0 |
| 1985 | 29 | 0 |
| 1986 | 29 | 0 |
| 1987 | 17 | 0 |
| 1988 | 18 | 0 |
| 1989 | 27 | 0 |
| 1990 | 16 | 0 |
| 1991 | 19 | 0 |
| 1992 | 27 | 0 |
| 1993 | 37 | 0 |
| 1994 | 35 | 0 |
| 1995 | 33 | 0 |
| 1996 | 40 | 0 |
| 1997 | 40 | 0 |
| 1998 | 50 | 0 |
| 1999 | 44 | 0 |
| 2000 | 45 | 0 |
| 2001 | 51 | 25 |
| 2002 | 58 | 41 |
| 2003 | 56 | 48 |
| 2004 | 32 | 104 |
| 2005 | 41 | 59 |
| 2006 | 51 | 61 |
| 2007 | 53 | 50 |
| 2008 | 41 | 76 |
| 2009 | 45 | 84 |
| 2010 | 40 | 77 |
| 2011 | 64 | 79 |
| 2012 | 62 | 92 |
| 2013 | 75 | 103 |
| 2014 | 80 | 116 |
| 2015 | 97 | 141 |
| 2016 | 107 | 146 |
| 2017 | 111 | 177 |
| 2018 | 172 | 229 |
| 2019 | 246 | 252 |
| 2020 | 228 | 217 |
| 2021 | 186 | 223 |
| 2022 | 158 | 212 |
| 2023 | 167 | 183 |
| 2024 | 144 | 183 |
| 2025 | 122 | 153 |
| 2026 | 69 | 94 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 3/143By two or more of a fractionation, separation or rectification step1,524
- B01D 3/16Fractionating columns in which vapour bubbles through liquid752
- B01D 3/32Other features of fractionating columns716
- B01D 3/141Where at least one distillation column contains at least one dividing wall331
- B01D 3/26Fractionating columns in which vapour and liquid flow past each other, or134
- B01D 3/30Fractionating columns with movable parts or in which centrifugal movement is caused61
Recent patents
- Heat integration via heat pump on bottom dividing wall column6 Oct 2026US 12,752,216 B2Sulzer Management AG
- System and method for substantially horizonal rotating reflux distillation apparatus6 Oct 2026US 12,752,217 B2Development Technologies, LLC
- Methods of dewatering of alcoholic solutions via forward osmosis and related systems6 Oct 2026US 12,752,239 B2Porifera, Inc.
- Upgrading bio-waste in FCC29 Sep 2026US 12,747,397 B2ExxonMobil Technology and Engineering Company
- Dual reactor system for simultaneous decontamination and cracking of plastic derived oil to circular chemicals22 Sep 2026US 12,742,125 B2Saudi Arabian Oil Company
- Systems and methods for using facilitated transport membranes to separate olefins and paraffins8 Oct 2026US 2026/0308087 A1
- A method and plant for purifying ethylene carbonate8 Oct 2026US 2026/0308137 A1Sulzer Management AG
- A method and plant for purifying ethylene carbonate8 Oct 2026US 2026/0308138 A1Sulzer Management AG
- Method for producing bioethanol and device for producing bioethanol8 Oct 2026US 2026/0308643 A1ARKHE Co., Ltd.
- Process for starting up a carbon capture process1 Oct 2026US 2026/0295494 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Methods for recovering acrylic acid353US 6,252,110 B1Nippon Shokubai Co., Ltd. · 2001
- Distillation process for ethanol209US 5,124,004 ATrustees of Dartmouth College · 1992
- Overland petroleum processor173US 4,983,259 A1991
- Apparatus for producing ethanol161US 4,678,543 AHuftung Fried Krupp Gesellschaft mit beschrankter · 1987
- Process for producing ethanol161US 4,692,218 AFried. Krupp Gesellschaft mit beschrankter Haftung · 1987