C07C 7/08
By extractive distillation
Official title: by extractive distillation
C07C7/08 (By extractive distillation) appears on 326 US grants and 231 published applications in this corpus.
Search patents in C07C- Granted patents
- 326
- Published applications
- 231
- Assignees
- 94
- Inventors
- 583
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 1 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 15 | 0 |
| 1993 | 9 | 0 |
| 1994 | 3 | 0 |
| 1995 | 10 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 2 |
| 2003 | 5 | 10 |
| 2004 | 1 | 4 |
| 2005 | 3 | 4 |
| 2006 | 0 | 4 |
| 2007 | 4 | 6 |
| 2008 | 5 | 6 |
| 2009 | 5 | 6 |
| 2010 | 4 | 8 |
| 2011 | 5 | 5 |
| 2012 | 7 | 6 |
| 2013 | 10 | 11 |
| 2014 | 9 | 19 |
| 2015 | 12 | 10 |
| 2016 | 7 | 12 |
| 2017 | 15 | 24 |
| 2018 | 22 | 20 |
| 2019 | 22 | 12 |
| 2020 | 13 | 7 |
| 2021 | 5 | 7 |
| 2022 | 8 | 15 |
| 2023 | 6 | 11 |
| 2024 | 16 | 9 |
| 2025 | 8 | 7 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- α-olefin extractant and method for separating an alkane and an α-olefin6 Oct 2026US 12,753,133 B2Inner Mongolia Yitai Coal-based New Materials Research Institute Co., Ltd.
- Processes and apparatuses for separating aromatic and non-aromatic hydrocarbons6 Jan 2026US 12,516,004 B2Uop LLC
- Use of polyamines in the pretreatment of biomass9 Dec 2025US 12,492,155 B2National Technology & Engineering Solutions of Sandia, LLC
- Process for removing butenes from C4-hydrocarbon streams and two-stage evaporation18 Nov 2025US 12,473,245 B2Evonik Oxeno GmbH
- Methods for converting C2+ olefins to higher carbon number olefins14 Oct 2025US 12,441,945 B2ExxonMobil Technology and Engineering Company
- Energy-efficient process for separating butenes from c4-hydrocarbon streams30 Jul 2026US 2026/0217631 A1Evonik Oxeno GmbH
- Method for purifying linear alpha olefins with stage-heated distillation column23 Jul 2026US 2026/0208066 A1Sabic Global Technologies B.V.
- Energy-efficient process for separating butenes from c4-hyrocarbons streams9 Jul 2026US 2026/0193156 A1Evonik Oxeno GmbH
- Use of polyamines in the pretreatment of biomass23 Apr 2026US 2026/0109657 A1National Technology & Engineering Solutions of Sandia, LLC
- Processes and apparatuses for separating aromatic and non-aromatic hydrocarbons2 Apr 2026US 2026/0092025 A1Uop LLC
Most cited
By later US patents
- Method for producing 1-butene87US 7,485,761 B2BASF SE · 2009
- Extractive distillation45US 4,053,369 APhillips Petroleum Company · 1977
- Extractive distillation43US 4,371,427 APhillips Petroleum Company · 1983
- Inhibiting catalyst coke formation in the manufacture of an olefin40US 6,657,022 B2ExxonMobil Chemical Patents Inc. · 2003
- Recovery and re-use of waste energy in industrial facilities29US 9,851,153 B2Saudi Arabian Oil Company · 2017