C01F 7/06
By treating aluminous minerals or waste-like raw materials with alkali hydroxide
Official title: by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F7/14)
C01F7/06 (By treating aluminous minerals or waste-like raw materials with alkali hydroxide) appears on 242 US grants and 158 published applications in this corpus.
Search patents in C01F- Granted patents
- 242
- Published applications
- 158
- Assignees
- 121
- Inventors
- 575
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 13 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 2 |
| 2002 | 4 | 1 |
| 2003 | 9 | 6 |
| 2004 | 4 | 7 |
| 2005 | 1 | 5 |
| 2006 | 2 | 7 |
| 2007 | 2 | 5 |
| 2008 | 2 | 5 |
| 2009 | 4 | 8 |
| 2010 | 6 | 7 |
| 2011 | 5 | 4 |
| 2012 | 4 | 10 |
| 2013 | 1 | 10 |
| 2014 | 9 | 9 |
| 2015 | 10 | 9 |
| 2016 | 4 | 14 |
| 2017 | 7 | 8 |
| 2018 | 10 | 3 |
| 2019 | 8 | 6 |
| 2020 | 3 | 7 |
| 2021 | 4 | 2 |
| 2022 | 2 | 6 |
| 2023 | 3 | 5 |
| 2024 | 5 | 6 |
| 2025 | 2 | 2 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01F 7/0646Separation of the insoluble residue75
- C01F 7/066Treatment of the separated residue57
- C01F 7/062Digestion55
- C01F 7/0606Making-up the alkali hydroxide solution from recycled spent liquor25
- C01F 7/0613Pretreatment of the minerals23
- C01F 7/0686From sulfate-containing minerals15
- C01F 7/0693From waste-like raw materials11
- C01F 7/0666Process control or regulation5
All 10 subgroupsShow fewer
Recent patents
- 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
- Use of calcium fluoride in the bayer process29 Jul 2025US 12,371,337 B2Rio Tinto Alcan International Limited
- Purification of ores using boronic acid-functional compounds19 Nov 2024US 12,145,856 B2Ecolab USA Inc.
- 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.
- The production method of lithium carbonate used in the cathode material of lithium-ion batteries from buxite ore6 Nov 2025US 2025/0340449 A1Eti AlüMinyum Anonim Sirket
Most cited
By later US patents
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Polymers containing hydroxamic acid groups for reduction of suspended solids in bayer process streams62US 4,767,540 AAmerican Cyanamid Company · 1988
- Rheology modification of settled solids in mineral processing44US 6,365,116 B1Nalco Chemical Company · 2002
- Recovery of alumina from bauxite43US 5,008,089 AAllied Colloids Limited · 1991
- Plasma whirl reactor apparatus and methods of use43US 8,324,523 B2Foret Plasma Labs, LLC · 2012