C07C 7/14
Purification: by crystallisation
Official title: by crystallisation; Purification or separation of the crystals
C07C7/14 (Purification: by crystallisation) appears on 150 US grants and 113 published applications in this corpus.
Search patents in C07C- Granted patents
- 150
- Published applications
- 113
- Assignees
- 83
- Inventors
- 328
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 7 |
| 2003 | 5 | 0 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 4 |
| 2008 | 2 | 2 |
| 2009 | 1 | 4 |
| 2010 | 2 | 8 |
| 2011 | 5 | 2 |
| 2012 | 5 | 7 |
| 2013 | 5 | 9 |
| 2014 | 5 | 4 |
| 2015 | 3 | 7 |
| 2016 | 10 | 6 |
| 2017 | 1 | 6 |
| 2018 | 2 | 2 |
| 2019 | 6 | 4 |
| 2020 | 5 | 13 |
| 2021 | 11 | 6 |
| 2022 | 8 | 2 |
| 2023 | 4 | 8 |
| 2024 | 5 | 3 |
| 2025 | 5 | 3 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for producing high purity aromatics from a mixed aromatic feed stream4 Nov 2025US 12,459,879 B2Virent, Inc.
- System and method for production of synthetic fatty acids16 Sep 2025US 12,415,772 B1Savor Foods Limited
- Method for separating 2-alkylanthracenes and use thereof for producing hydrogen peroxide19 Aug 2025US 12,391,633 B2China Petroleum & Chemical Corporation
- Methane separation system and method1 Jul 2025US 12,344,580 B2Bennamann Services Ltd
- Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit24 Jun 2025US 12,338,215 B2Sulzer Management AG
- Zeolitic adsorbent for high productivity xylene separation30 Jul 2026US 2026/0216691 A1
- Methods and systems for improving ethylene yield from iso-pentane feed by reverse isomerization and separation18 Jun 2026US 2026/0167589 A1Sabic Global Technologies B.V.
- System and method for recovering naphthalene from a rerun column bottom sample12 Feb 2026US 2026/0042719 A1
- Methods for producing monocyclic aromatic hydrocarbon, terephthalic acid, and polyethylene terephthalate, and management methods therefor25 Dec 2025US 2025/0388822 A1Eneos Corporation
- System and method for production of synthetic fatty acids11 Dec 2025US 2025/0376433 A1Savor Foods Limited
Most cited
By later US patents
- Gas separation process114US 4,609,388 ACNG Research Company · 1986
- Gas separation process99US 4,270,937 ACNG Research Company · 1981
- Process and apparatus for heat treating halogenated compounds53US 5,401,890 AAlbemarle Corporation · 1995
- Process for separating paraxylene comprising at least two crystallization stages at high temperature53US 6,147,272 AInstitut Francais du Petrole · 2000
- Process and apparatus for the separation of p-xylene in C.sub.8 aromatic hydrocarbons with a simulated moving bed absorption and a crystallization49US 5,284,992 AInstitut Francais du Petrole · 1994