C07C 29/82
By azeotropic distillation
Official title: by azeotropic distillation
C07C29/82 (By azeotropic distillation) appears on 156 US grants and 98 published applications in this corpus.
Search patents in C07C- Granted patents
- 156
- Published applications
- 98
- Assignees
- 76
- Inventors
- 305
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 9 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 13 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 14 |
| 2009 | 2 | 2 |
| 2010 | 1 | 7 |
| 2011 | 5 | 3 |
| 2012 | 5 | 6 |
| 2013 | 11 | 10 |
| 2014 | 6 | 2 |
| 2015 | 5 | 6 |
| 2016 | 3 | 4 |
| 2017 | 3 | 4 |
| 2018 | 3 | 2 |
| 2019 | 7 | 6 |
| 2020 | 5 | 2 |
| 2021 | 3 | 3 |
| 2022 | 3 | 1 |
| 2023 | 1 | 7 |
| 2024 | 0 | 5 |
| 2025 | 4 | 4 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Recovering mono-ethylene glycol8 Sep 2026US 12,729,173 B2Changchun Meihe Science and Technology Development Co., Ltd.
- Method for extracting alcohols from an initial mixture comprising alcohols in aqueous phase16 Dec 2025US 12,497,345 B2Ifp Energies Nouvelles
- Method for purifying (hydro)halocarbon by reduced pressure distillation from azeotropic or azeotropic-like composition21 Oct 2025US 12,448,343 B2Central Glass Company, Limited
- Methods for separating the binary azeotropic mixture of ethylene glycol and ethylene glycol diacetate with sulfolane entrainer30 Sep 2025US 12,428,367 B2Changzhou University
- Method for refining bio-based propylene glycol29 Apr 2025US 12,286,393 B2Changchun Meihe Science and Technology Development Co., Ltd.
- Dimethyl ether (dme) synthesis13 Aug 2026US 2026/0234086 A1Lummus Technology Inc.
- Method for purifying isopropyl alcohol13 Aug 2026US 2026/0234087 A1LG Chem.Ltd.
- Method for preparing isopropyl alcohol13 Aug 2026US 2026/0234088 A1LG Chem.Ltd.
- Method for preparing isopropyl alcohol13 Aug 2026US 2026/0234089 A1LG Chem.Ltd.
- Azeotropic extractive distillation for enhanced methanol refinement13 Aug 2026US 2026/0234090 A1Lummus Technology Inc.
Most cited
By later US patents
- 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
- Separation of ethyl acetate from ethanol by azeotropic distillation95US 5,993,610 A1999
- Separation of ethanol from isopropanol by azeotropic distillation86US 5,415,741 A1995
- Separation of ethanol from isopropanol by azeotropic distillation86US 5,437,770 A1995