C07C 7/00
Purification
Official title: Purification; Separation; Use of additives (working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G70/00)
C07C7/00 (Purification) appears on 4,321 US grants and 3,377 published applications in this corpus.
Search patents in C07C- Granted patents
- 4,321
- Published applications
- 3,377
- Assignees
- 1,077
- Inventors
- 7,713
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 70 | 0 |
| 1977 | 90 | 0 |
| 1978 | 70 | 0 |
| 1979 | 53 | 0 |
| 1980 | 56 | 0 |
| 1981 | 69 | 0 |
| 1982 | 57 | 0 |
| 1983 | 78 | 0 |
| 1984 | 103 | 0 |
| 1985 | 93 | 0 |
| 1986 | 69 | 0 |
| 1987 | 70 | 0 |
| 1988 | 60 | 0 |
| 1989 | 58 | 0 |
| 1990 | 65 | 0 |
| 1991 | 63 | 0 |
| 1992 | 63 | 0 |
| 1993 | 57 | 0 |
| 1994 | 49 | 0 |
| 1995 | 82 | 0 |
| 1996 | 51 | 0 |
| 1997 | 44 | 0 |
| 1998 | 58 | 0 |
| 1999 | 73 | 0 |
| 2000 | 54 | 0 |
| 2001 | 59 | 9 |
| 2002 | 72 | 72 |
| 2003 | 62 | 67 |
| 2004 | 53 | 94 |
| 2005 | 37 | 76 |
| 2006 | 54 | 77 |
| 2007 | 51 | 66 |
| 2008 | 67 | 84 |
| 2009 | 51 | 88 |
| 2010 | 66 | 113 |
| 2011 | 70 | 91 |
| 2012 | 73 | 109 |
| 2013 | 97 | 179 |
| 2014 | 119 | 241 |
| 2015 | 144 | 232 |
| 2016 | 159 | 190 |
| 2017 | 166 | 178 |
| 2018 | 190 | 199 |
| 2019 | 198 | 172 |
| 2020 | 170 | 183 |
| 2021 | 139 | 173 |
| 2022 | 172 | 155 |
| 2023 | 112 | 149 |
| 2024 | 119 | 142 |
| 2025 | 110 | 136 |
| 2026 | 56 | 102 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C07C 7/04Purification: by distillation1,223
- C07C 7/12Purification: by adsorption, i.e. purification or separation of hydrocarbons with the aid1,159
- C07C 7/148Purification: by treatment giving rise to a chemical modification of at least902
- C07C 7/005Processes comprising at least two steps in series776
- C07C 7/11Purification: by absorption, i.e. purification or separation of gaseous hydrocarbons with the353
- C07C 7/20Use of additives338
- C07C 7/144Purification: using membranes292
- C07C 7/10Purification: by extraction, i.e. purification or separation of liquid hydrocarbons with the252
Recent patents
- Heat integration via heat pump on bottom dividing wall column6 Oct 2026US 12,752,216 B2Sulzer Management AG
- 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.
- Gas separation system and method for producing methane-enriched gas15 Sep 2026US 12,734,474 B2Ube Corporation
- Dehydrogenation and pyrolysis product recovery with heat integration8 Sep 2026US 12,728,378 B2Uop LLC
- Method for purifying 1-hexene8 Sep 2026US 12,729,170 B2Sabic Global Technologies B.V.
- Method for treating a fluid, fluid discharge device for a fluid and associated system8 Oct 2026US 2026/0306992 A1
- Gas separation method, method for producing purified gas, and gas separation apparatus8 Oct 2026US 2026/0306996 A1Asahi Kasei Kabushiki Kaisha
- Systems and methods for using facilitated transport membranes to separate olefins and paraffins8 Oct 2026US 2026/0308087 A1
- Selective hydrodechlorination of liquid and gas streams from plastics pyrolysis processes8 Oct 2026US 2026/0308088 A1BASF SE
- Process for the preparation of polyisobutene from olefins from isobutanol obtained from mixed guerbet reaction of ethanol and methanol8 Oct 2026US 2026/0308287 A1BASF SE
Most cited
By later US patents
- Crystalline silica263US 4,061,724 AUnion Carbide Corporation · 1977
- Process for removing mercury from a gas or a liquid by absorption on a copper sulfide containing solid mass253US 4,094,777 AInstitut Francais du Petrole · 1978
- High efficiency continuous separation process212US 4,402,832 AUop LLC · 1983
- Zeolite ITQ-1169US 6,077,498 AConsejo Superior Investigaciones Cientificas · 2000
- Catalytic distillation process146US 4,232,177 AChemical Research & Licensing Company · 1980