C01D 7/22
Purification
C01D7/22 (Purification) appears on 97 US grants and 87 published applications in this corpus.
Search patents in C01D- Granted patents
- 97
- Published applications
- 87
- Assignees
- 77
- Inventors
- 235
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 1 |
| 2002 | 5 | 1 |
| 2003 | 4 | 5 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 2 | 5 |
| 2010 | 3 | 6 |
| 2011 | 0 | 7 |
| 2012 | 2 | 4 |
| 2013 | 4 | 3 |
| 2014 | 5 | 4 |
| 2015 | 2 | 4 |
| 2016 | 4 | 5 |
| 2017 | 3 | 4 |
| 2018 | 6 | 4 |
| 2019 | 2 | 4 |
| 2020 | 3 | 2 |
| 2021 | 4 | 3 |
| 2022 | 1 | 3 |
| 2023 | 2 | 5 |
| 2024 | 2 | 2 |
| 2025 | 3 | 8 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Lithium carbonate production process and apparatus30 Jun 2026US 12,668,497 B2U. S. Borax Inc.
- Crystallization of salts from high pressure reverse osmosis concentrate16 Jun 2026US 12,655,040 B2Saltworks Technologies Inc.
- Resource-oriented utilization method for high-salt salt mud containing sodium chloride and sodium sulfate19 May 2026US 12,630,453 B2Dongjiang Enviromental Company Limited
- Lithium carbonate recovery process12 May 2026US 12,623,912 B2Cornish Lithium PLC
- Process for treating a sodium carbonate purge7 Oct 2025US 12,434,976 B1Solvay SA
- Process for extracting metals from lithium-ion batteries13 Aug 2026US 2026/0234749 A1Arabat S.R.L.
- Method for the extraction of lithium30 Jul 2026US 2026/0217549 A1Primero Group Limited
- Lithium recovery by leaching from waste cationic materials and method for preparation of lithium carbonate28 May 2026US 2026/0145956 A1Cosmochemical Co., Ltd.
- Pond System for Effective Sodium Carbonate Separation from Sodium Chloride6 Nov 2025US 2025/0340446 A1Genesis Alkali Wyoming, LP
- Selective lithium extraction for cathode materials16 Oct 2025US 2025/0323337 A1
Most cited
By later US patents
- Apparatus and process for electrodialysis of salts67US 6,221,225 B1Archer Daniels Midland Company · 2001
- Production of sodium carbonate from solution mine brine59US 5,955,043 ATg Soda Ash, Inc. · 1999
- Production of feed liquors for sodium carbonate crystallization processes40US 6,428,759 B1FMC Wyoming Corporation · 2002
- Solution mining of carbonate/bicarbonate deposits to produce soda ash38US 5,766,270 ATg Soda Ash, Inc. · 1998
- Enhanced recovery of sodium carbonate from NaCl-containing sodium carbonate solutions28US 4,288,419 AIntermountain Research & Develop. Corp. · 1981