C07C 45/83
By extractive distillation
Official title: by extractive distillation
C07C45/83 (By extractive distillation) appears on 101 US grants and 42 published applications in this corpus.
Search patents in C07C- Granted patents
- 101
- Published applications
- 42
- Assignees
- 53
- Inventors
- 228
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 2 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 3 | 5 |
| 2020 | 4 | 7 |
| 2021 | 5 | 3 |
| 2022 | 1 | 2 |
| 2023 | 2 | 3 |
| 2024 | 2 | 3 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Removal of acetals from process streams17 Mar 2026US 12,577,189 B2Celanese International Corporation
- Process for producing methacrylic acid or methacrylic acid esters20 Feb 2024US 11,905,239 B2Rohm Co., Ltd.
- Process for producing methacrylic acid or methacrylic acid esters9 Jan 2024US 11,866,387 B2Rohm Co., Ltd.
- Process for preparing C5 aldehydes12 Dec 2023US 11,840,506 B2Evonik Operations GmbH
- Methods for separation of azeotrope or azeotrope-like compositions of trifluoroiodomethane (CF3I) and trifluoroacetyl chloride (CF3COCI)31 Jan 2023US 11,565,992 B2Honeywell International Inc.
- Process for production of propylene oxide and styrene monomer31 Jul 2025US 2025/0243142 A1Lyondell Chemical Technology, L,P.
- Process for the hydroformylation of diisobutene with preceding distillation19 Dec 2024US 2024/0417355 A1Evonik Oxeno GmbH
- Process for the purification of vanillin or a vanillin derivative obtained by a biotechnological process2 May 2024US 2024/0140896 A1Specialty Operations France
- Process for separating heavy by-products and catalyst ligan from a vapour stream comprising aldehyde15 Feb 2024US 2024/0051908 A1Johnson Matthey Davy Technologies Limited
- Process for preparing c5 aldehydes9 Nov 2023US 2023/0357117 A1Evonik Operations GmbH
Most cited
By later US patents
- Process for production of phenol and cyclohexanone58US 4,021,490 APhillips Petroleum Company · 1977
- Separation of acetone from methanol by extractive distillation15US 4,584,063 A1986
- Separation of phenol-cyclohexanone azeotrope by extractive distillation with adipic acid diester12US 4,016,049 APhillips Petroleum Company · 1977
- Separation of phenol, cyclohexanone, and cyclohexylbenzene containing mixtures employing dialkyl and dicycloalkyl phthalates11US 4,019,965 APhillips Petroleum Company · 1977
- Process for preparing .beta.,.gamma.-unsaturated aldehydes11US 4,110,403 ATeijin Limited · 1978