C07C 51/48
By liquid-liquid treatment
Official title: by liquid-liquid treatment
C07C51/48 (By liquid-liquid treatment) appears on 471 US grants and 431 published applications in this corpus.
Search patents in C07C- Granted patents
- 471
- Published applications
- 431
- Assignees
- 280
- Inventors
- 1,300
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 12 | 0 |
| 2001 | 9 | 2 |
| 2002 | 12 | 8 |
| 2003 | 10 | 17 |
| 2004 | 10 | 14 |
| 2005 | 6 | 16 |
| 2006 | 9 | 11 |
| 2007 | 12 | 9 |
| 2008 | 12 | 10 |
| 2009 | 8 | 19 |
| 2010 | 12 | 12 |
| 2011 | 13 | 19 |
| 2012 | 8 | 17 |
| 2013 | 13 | 36 |
| 2014 | 24 | 24 |
| 2015 | 26 | 25 |
| 2016 | 18 | 34 |
| 2017 | 19 | 16 |
| 2018 | 24 | 19 |
| 2019 | 26 | 24 |
| 2020 | 17 | 10 |
| 2021 | 16 | 17 |
| 2022 | 8 | 14 |
| 2023 | 7 | 13 |
| 2024 | 3 | 19 |
| 2025 | 4 | 16 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Catalytic and continuous thermochemical process of production of valuable derivatives from organic materials and/or waste6 Oct 2026US 12,753,141 B2Instituto Superior Tecnico
- Method of producing carboxylic acid18 Aug 2026US 12,709,763 B2Toray Industries, Inc.
- Method of extracting carbonic acid, aliphatic acids, esters and alcohols from an aqueous medium21 Jul 2026US 12,686,694 B2Evonik Operations GmbH
- Method for preparing acrylic acid24 Mar 2026US 12,583,812 B2LG Chem.Ltd.
- Process for recovering oxidation by-products17 Mar 2026US 12,577,193 B2Ineos US Chemicals Company
- Method for separating depolymerization product17 Sep 2026US 2026/0274782 A1Honda Motor Co., Ltd.
- Acetonitrile compositions and methods of making the same16 Jul 2026US 2026/0200835 A1Nitto Denko Corporation
- Method for extraction and transformation by hydrolysis of phtalates contained in pvc plastics9 Jul 2026US 2026/0193439 A1Ifp Energies Nouvelles
- Bio-based succinic acid composition, preparation method therefor, and polyester prepared therefrom28 May 2026US 2026/0146129 A1Liaoning Kingfa Biomaterial Co., Ltd.
- Acetonitrile compositions and methods of making the same23 Apr 2026US 2026/0109666 A1Safion Renewables Inc.
Most cited
By later US patents
- Removal of permanganate reducing compounds and alkyl iodides from a carbonylation process stream197US 6,143,930 ACelanese International Corporation · 2000
- Microbial process for the preparation of acetic acid as well as solvent for its extraction from the fermentation broth148US 6,368,819 B1Bioengineering Resources, Inc. · 2002
- Extraction process for removal of impurities from terephthalic acid filtrate142US 4,939,297 AEastman Kodak Company · 1990
- Recovery of acids from aqueous solutions113US 4,275,234 AImi Tami Institute for Research and Development Ltd. · 1981
- Process for producing highly purified benzenedicarboxylic acid isomers91US 5,359,133 AJoint-Stock Company of Research and Design Institute of Monomers (AO NIPIM) · 1994