C01F 7/04
Preparation of alkali metal aluminates
Official title: Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence)
C01F7/04 (Preparation of alkali metal aluminates) appears on 474 US grants and 293 published applications in this corpus.
Search patents in C01F- Granted patents
- 474
- Published applications
- 293
- Assignees
- 271
- Inventors
- 1,102
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 20 | 0 |
| 1978 | 11 | 0 |
| 1979 | 9 | 0 |
| 1980 | 7 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 6 | 0 |
| 1984 | 12 | 0 |
| 1985 | 11 | 0 |
| 1986 | 16 | 0 |
| 1987 | 12 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 3 | 0 |
| 1991 | 12 | 0 |
| 1992 | 14 | 0 |
| 1993 | 5 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 17 | 2 |
| 2002 | 7 | 3 |
| 2003 | 12 | 10 |
| 2004 | 6 | 8 |
| 2005 | 4 | 8 |
| 2006 | 2 | 12 |
| 2007 | 2 | 10 |
| 2008 | 5 | 9 |
| 2009 | 6 | 14 |
| 2010 | 12 | 14 |
| 2011 | 10 | 9 |
| 2012 | 6 | 13 |
| 2013 | 5 | 15 |
| 2014 | 15 | 17 |
| 2015 | 15 | 10 |
| 2016 | 7 | 17 |
| 2017 | 10 | 22 |
| 2018 | 14 | 12 |
| 2019 | 17 | 10 |
| 2020 | 10 | 11 |
| 2021 | 7 | 10 |
| 2022 | 5 | 12 |
| 2023 | 8 | 15 |
| 2024 | 9 | 11 |
| 2025 | 6 | 10 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01F 7/06By treating aluminous minerals or waste-like raw materials with alkali hydroxide242
- C01F 7/14Aluminium oxide or hydroxide from alkali metal aluminates193
- C01F 7/043Lithium aluminates32
- C01F 7/08By treating aluminous minerals with sodium carbonate12
- C01F 7/046Stabilisation of aluminates4
- C01F 7/10By treating aluminous minerals with alkali sulfates and reducing agents3
- C01F 7/12Alkali metal aluminates from alkaline-earth metal aluminates1
Recent patents
- Strontium-catalyzed boehmite formation14 Jul 2026US 12,679,738 B2BASF SE
- Alumina modified with a short chain carboxylic acid for use as a coating and a method for producing the same10 Mar 2026US 12,570,538 B2
- Heat exchanger3 Feb 2026US 12,540,775 B2
- Acid wash of red mud (bauxite residue)20 Jan 2026US 12,528,709 B2Worcester Polytechnic Institute
- Bauxite processing method5 Aug 2025US 12,378,632 B2
- Comprehensive utilization method for steel making slag13 Aug 2026US 2026/0234753 A1Yuanchu Technology (Beijing) Co., Ltd.
- Method for resource recovery from a bauxite residue6 Aug 2026US 2026/0225111 A1Ermafa Environmental Technologies GmbH
- Method for digesting bauxite slurry25 Jun 2026US 2026/0176151 A1Zhengzhou Non-Ferrous Metals Research Institute Co. Ltd of Chalco
- Method for treating high-iron bauxite30 Apr 2026US 2026/0116771 A1Zhengzhou Non-Ferrous Metals Research Institute Co. Ltd of Chalco
- Purification of mineral ores using cationic copolymers12 Mar 2026US 2026/0070069 A1Ecolab USA Inc.
Most cited
By later US patents
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Crystalline lithium aluminates66US 4,348,297 AThe Dow Chemical Company · 1982
- Crystalline lithium aluminates62US 4,348,296 AThe Dow Chemical Company · 1982
- Polymers containing hydroxamic acid groups for reduction of suspended solids in bayer process streams62US 4,767,540 AAmerican Cyanamid Company · 1988
- Crystalline lithium aluminates61US 4,348,295 AThe Dow Chemical Company · 1982