C01D 5/16
Purification
Official title: Purification {(C01D5/145 takes precedence)}
C01D5/16 (Purification) appears on 51 US grants and 51 published applications in this corpus.
Search patents in C01D- Granted patents
- 51
- Published applications
- 51
- Assignees
- 58
- Inventors
- 155
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 3 | 0 |
| 2010 | 0 | 3 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 2 |
| 2014 | 4 | 2 |
| 2015 | 2 | 0 |
| 2016 | 1 | 3 |
| 2017 | 1 | 2 |
| 2018 | 2 | 3 |
| 2019 | 3 | 6 |
| 2020 | 3 | 2 |
| 2021 | 2 | 3 |
| 2022 | 3 | 3 |
| 2023 | 2 | 4 |
| 2024 | 2 | 5 |
| 2025 | 1 | 3 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Crystallization of salts from high pressure reverse osmosis concentrate16 Jun 2026US 12,655,040 B2Saltworks Technologies Inc.
- Method for forming insoluble solute adducts using an acidic medium17 Mar 2026US 12,577,119 B2Crystaphase Products, Inc.
- Leaching-seepage process of sodium sulfate in thenardite tailing stack24 Feb 2026US 12,559,378 B2SC Hongya Qingyijiang Sodium Sulphate Co., Ltd.
- Method of concentrating lithium-containing solutions and recovering lithium therefrom20 Jan 2026US 12,528,053 B2UT-Battelle, LLC
- Process and system for recovering lithium from lithium-ion batteries6 Jan 2026US 12,516,399 B2Green Li-Ion Pte. Ltd.
- Method For Recovering Rare Earths And Coproducts From Phosphogypsum And Phosphoric Acid Sludge10 Sep 2026US 2026/0265867 A1Universite Mohammed VI Polytechnique
- Method for forming insoluble solute adducts using an acidic medium28 May 2026US 2026/0145955 A1Crystaphase Products, Inc.
- Recovery system for preparing magnesium sulfate from sulfuric acid waste solution and method thereof12 Mar 2026US 2026/0070801 A1Mg Chem Co., Ltd.
- Method for producing potassium sulfate by metathesis process, potassium sulfate product and potash fertilizer26 Feb 2026US 2026/0055001 A1MiGao Century Engineering Technology (Chengdu) Limited Company
- Method of collecting anhydrous sodium sulfate from fly ash19 Jun 2025US 2025/0197233 A1Industrial Technology Research Institute
Most cited
By later US patents
- Recovery of inorganic salt during processing of lignocellulosic feedstocks52US 7,585,652 B2Iogen Energy Corporation · 2009
- Method of reforming soluble salts to effect purification and increase crystal size thereof20US 5,300,123 A1994
- Methods for treating agricultural drainage water and the like19US 7,501,065 B12009
- Recovery of inorganic salt during processing of lignocellulosic feedstocks17US 8,247,203 B2Iogen Energy Corporation · 2012
- Fixed-resin bed technologies for the treatment of the chlorine dioxide generator effluent and feeds stream13US 5,792,441 AEco-Tec Limited · 1998