C01F 7/47
Of aluminates
Official title: of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
C01F7/47 (Of aluminates) appears on 137 US grants and 58 published applications in this corpus.
Search patents in C01F- Granted patents
- 137
- Published applications
- 58
- Assignees
- 66
- Inventors
- 296
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 2 | 3 |
| 2004 | 3 | 7 |
| 2005 | 0 | 1 |
| 2006 | 3 | 2 |
| 2007 | 4 | 4 |
| 2008 | 0 | 1 |
| 2009 | 2 | 3 |
| 2010 | 4 | 1 |
| 2011 | 4 | 4 |
| 2012 | 2 | 4 |
| 2013 | 2 | 7 |
| 2014 | 1 | 2 |
| 2015 | 4 | 0 |
| 2016 | 2 | 2 |
| 2017 | 0 | 4 |
| 2018 | 4 | 1 |
| 2019 | 2 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 3 |
| 2022 | 0 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Acid wash of red mud (bauxite residue)20 Jan 2026US 12,528,709 B2Worcester Polytechnic Institute
- Waste battery treatment method28 Oct 2025US 12,456,767 B2LG Energy Solution, Ltd.
- Use of calcium fluoride in the bayer process29 Jul 2025US 12,371,337 B2Rio Tinto Alcan International Limited
- Bayer process11 Jun 2024US 12,006,225 B2Rio Tinto Alcan International Limited
- Systems and methods for alumina production21 Feb 2023US 11,584,657 B2Solenis Technologies, L.P.
- Composition comprising lithium-containing compound, and battery disposal method10 Jul 2025US 2025/0223183 A1Posco
- Bayer Process22 Aug 2024US 2024/0279075 A1Rio Tinto AIcan International Limited
- Method of processing bauxites to produce alumina11 Jan 2024US 2024/0010508 A1Obshchestvo S Ogranichennoy Otvetstvennost'yu "Obedinennaya Kompaniya Rusal Inzhenemo-Tekhnolo
- Acid wash of red mud (bauxite residue)16 Feb 2023US 2023/0051612 A1Worcester Polytechnic Institute
- Methods for recovering organic salts from industrial process streams12 Jan 2023US 2023/0011640 A1Cytec Industries Inc.
Most cited
By later US patents
- Polymers containing hydroxamic acid groups for reduction of suspended solids in bayer process streams62US 4,767,540 AAmerican Cyanamid Company · 1988
- Recovery of alumina from bauxite43US 5,008,089 AAllied Colloids Limited · 1991
- Process for liquid/liquid extraction of gallium31US 3,971,843 ARhone-Poulenc Industries · 1976
- Method for the removal of organic substances from alkali metal aluminate solution29US 4,215,094 ASumitomo Aluminum Smelting Company, Ltd. · 1980
- Use of dextran as a filtration aid for thickener overflow filtration in Kelly filters in the Bayer process29US 5,091,159 ANalco Chemical Company · 1992