Process for the removal of heavy metals from a phosphoric acid containing composition using a flocculating agent
US-12545582-B2 · Feb 10, 2026 · US
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Cationic impurities {, e.g. arsenic compounds}
Cationic impurities {, e.g. arsenic compounds} · 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 | C01B25/238 |
| Official title | Cationic impurities {, e.g. arsenic compounds} |
| Display label | Cationic impurities {, e.g. arsenic compounds} |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2019 | 1 |
| 2020 | 1 |
| 2023 | 4 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for the removal of heavy metals from a phosphoric acid containing composition using an ionic polymeric surfactant and use of said surfactant in the precipitation of heavy metals in a phosphoric acid containing composition
US-12545584-B2 · Feb 10, 2026 · US
Process for the removal of heavy metals from a phosphoric acid containing composition
US-12545583-B2 · Feb 10, 2026 · US
Method for treating solid hazardous heavy metal-containing compositions
US-12508636-B2 · Dec 30, 2025 · US
Method for separating and purifying phosphoric acid and phosphogypsum from wet-process phosphoric acid slurry, and phosphoric acid and phosphogypsum prepared thereby
US-12434977-B2 · Oct 7, 2025 · US
Method for producing phosphoric acid
US-2025162870-A1 · May 22, 2025 · US
Fertilizer and manufacturing method thereof
US-2025162955-A1 · May 22, 2025 · US
Method for separating and purifying phosphoric acid and phosphogypsum from wet-process phosphoric acid slurry, and phosphoric acid and phosphogypsum prepared thereby
US-2025162899-A1 · May 22, 2025 · US
Process for the removal of heavy metals from a phosphoric acid containing composition using an ionic polymeric surfactant and use of said surfactant in the precipitation of heavy metals in a phosphoric acid containing composition
US-2023234847-A1 · Jul 27, 2023 · US
Process for the removal of heavy metals from a phosphoric acid containing composition using a flocculating agent
US-2023227311-A1 · Jul 20, 2023 · US
Process for the removal of heavy metals from a phosphoric acid containing composition
US-2023219817-A1 · Jul 13, 2023 · US
Method for treating solid hazardous heavy metal-containing compositions
US-2023218940-A1 · Jul 13, 2023 · US
Compositions and processes for removing heavy metals from phosphoric acid solutions
US-10865110-B2 · Dec 15, 2020 · US
Compositions and processes for removing heavy metals from phosphoric acid solutions
US-2019106324-A1 · Apr 11, 2019 · US
Method for removing metal ions in phosphoric acid solution
US-2016016799-A1 · Jan 21, 2016 · US