Metals recovery from spent supported catalyst
US-12577125-B2 · Mar 17, 2026 · US
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from spent catalysts
from spent catalysts · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C22B34/225 |
| Official title | {from spent catalysts} |
| Display label | from spent catalysts |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 2 |
| 2021 | 3 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the selective recovery of transition metals from organic residues
US-12392011-B2 · Aug 19, 2025 · US
Method for selective recovery of valuable metal from waste denitrification catalyst through alkali fusion
US-12037659-B2 · Jul 16, 2024 · US
Selective recovery method of vanadium and cesium from waste sulfuric acid vanadium catalyst, and high-quality vanadium aqueous solution and cesium alum produced thereby
US-11807544-B2 · Nov 7, 2023 · US
Metals recovery from spent supported catalyst
US-2023257280-A1 · Aug 17, 2023 · US
Metals recovery from spent catalyst
US-2023160037-A1 · May 25, 2023 · US
Selective recovery method of vanadium and cesium from waste sulfuric acid vanadium catalyst, and high-quality vanadium aqueous solution and cesium alum produced thereby
US-2023138828-A1 · May 4, 2023 · US
Metals recovery from spent catalyst
US-2022259696-A1 · Aug 18, 2022 · US
Process for the selective recovery of transition metals from organic residues
US-2021388462-A1 · Dec 16, 2021 · US
Method for selective recovery of valuable metal from waste denitrification catalyst through alkali fusion
US-2021130928-A1 · May 6, 2021 · US
Method for leaching precious metals contained in waste denitrification catalyst using pressure leaching process
US-10913989-B2 · Feb 9, 2021 · US
Method for recovering vanadium and tungsten from leach solution of waste denitrification catalyst
US-10415117-B2 · Sep 17, 2019 · US
Method for recovering target materials from source materials
US-10323298-B2 · Jun 18, 2019 · US
Method for recovering target materials from source materials
US-2018223391-A1 · Aug 9, 2018 · US
Method for leaching valuable metals contained in waste denitrification catalyst by using roasting and water leaching
US-10017839-B2 · Jul 10, 2018 · US
Process for separating and recovering metals
US-9809870-B2 · Nov 7, 2017 · US
Method for leaching precious metals contained in waste denitrification catalyst using pressure leaching process
US-2017073795-A1 · Mar 16, 2017 · US
Process for recovering metals from a stream rich in hydrocarbons and carbonaceous residues
US-9157033-B2 · Oct 13, 2015 · US
Method for leaching valuable metals contained in waste denitrification catalyst by using roasting and water leaching
US-2015203938-A1 · Jul 23, 2015 · US
Process for the selective removal of molybdenum from a solution containing it
US-9045813-B2 · Jun 2, 2015 · US