C07C 29/84
By extractive distillation
Official title: by extractive distillation
C07C29/84 (By extractive distillation) appears on 195 US grants and 147 published applications in this corpus.
Search patents in C07C- Granted patents
- 195
- Published applications
- 147
- Assignees
- 102
- Inventors
- 396
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 13 | 0 |
| 1988 | 6 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 0 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 11 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 2 | 11 |
| 2012 | 3 | 6 |
| 2013 | 8 | 9 |
| 2014 | 6 | 9 |
| 2015 | 13 | 5 |
| 2016 | 2 | 3 |
| 2017 | 2 | 4 |
| 2018 | 2 | 0 |
| 2019 | 6 | 8 |
| 2020 | 9 | 12 |
| 2021 | 7 | 12 |
| 2022 | 8 | 15 |
| 2023 | 9 | 23 |
| 2024 | 11 | 14 |
| 2025 | 12 | 7 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for enhanced ethanol production14 Jul 2026US 12,679,794 B2ICM, Inc.
- Method for the preparation of 1,2-propanediol, dipropylene glycol and tripropylene glycol7 Jul 2026US 12,673,912 B2Evonik Operations GmbH
- Process for producing glycols from carbohydrates and burning waste16 Jun 2026US 12,655,081 B2Avantium Knowledge Centre B.V.
- Process for purifying a mixture of diols28 Apr 2026US 12,612,348 B2Novamont S. p. A.
- Method for producing 1,3-butylene glycol, and 1,3-butylene glycol product25 Nov 2025US 12,478,568 B2Daicel Corporation
- Method for purification of ethanol using extractive distillation24 Sep 2026US 2026/0285790 A1Air Company Holdings, Inc.
- Process for distillative recovery of 1,1,1,3,3,3-hexafluoro-2-propanol (hfip) from mixtures with 4- substituted 1,2,3,4-tetrahydroquinolines28 May 2026US 2026/0146013 A1Bayer Aktiengesellschaft
- Process for evaporating water from stillage28 Aug 2025US 2025/0269296 A1ICM, Inc.
- Systems and methods for rehabilitating alcohol compositions and rehabilitated alcoholic products7 Aug 2025US 2025/0249378 A1True Essence Foods Inc.
- Process for production of propylene oxide and styrene monomer31 Jul 2025US 2025/0243142 A1Lyondell Chemical Technology, L,P.
Most cited
By later US patents
- Separation of 1-pentanol from cyclopentanol by extractive distillation258US 5,320,715 A1994
- Process for the preparation of ethanol161US 4,395,576 AShell Oil Company · 1983
- Alcohol distillation process154US 3,990,952 ARaphael Katzen Associates International, Inc. · 1976
- Low energy extractive distillation process for producing anhydrous ethanol152US 5,035,776 AUniversity of Massachusetts · 1991
- Separation of ethanol mixtures by extractive distillation105US 6,375,807 B12002