C01B 25/232
Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently
Official title: Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently lixiviating the obtained mass, e.g. clinker process
C01B25/232 (Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently) appears on 9 US grants and 8 published applications in this corpus.
Search patents in C01B- Granted patents
- 9
- Published applications
- 8
- Assignees
- 11
- Inventors
- 27
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
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| 1976 | 1 | 0 |
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| 2016 | 0 | 1 |
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| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 3 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for producing technical grade phosphoric acid from sewage sludge ash25 Aug 2026US 12,715,771 B2Tecnicas Reunidas S. A.
- Integrated method for the commercial and industrial utilisation of calcium sulphate whilst obtaining rare earth elements from the production of phosphoric acid28 Apr 2026US 12,612,309 B2thyssenkrupp AG
- Method for producing phosphoric acid and calcium sulphate quality suitable for a clinker process for the commercial and industrial utilization of calcium sulphate24 Mar 2026US 12,583,747 B2thyssenkrupp AG
- Integrated method for producing sulphur dioxide quality suitable for a sulphuric acid process from calcium sulphate/phosphogypsum from phosphoric acid production19 Dec 2023US 11,845,657 B2thyssenkrupp AG
- Method for removing iron in the manufacture of phosphoric acid29 Aug 2017US 9,745,193 B2Jacobs Engineering Group Inc.
- Process for producing phosphate products and sulfate products1 Oct 2026US 2026/0296906 A1Susphos B.V.
- Process for the production of a purified phosphoric acid solution and/or dicalcium phosphate salts11 Jun 2026US 2026/0159391 A1Takhim for Technology and Business Services
- Process for producing technical grade phosphoric acid from sewage sludge ash6 Mar 2025US 2025/0074772 A1Tecnicas Reunidas S. A.
- Method for producing phosphoric acid and calcium sulphate quality suitable for a clinker process for the commercial and industrial utilization of calcium sulphate23 Nov 2023US 2023/0373789 A1thyssenkrupp AG
- Integrated method for producing sulphur dioxide quality suitable for a sulphuric acid process from calcium sulphate/phosphogypsum from phosphoric acid production27 Apr 2023US 2023/0126633 A1thyssenkrupp AG
Most cited
By later US patents
- Process for the treatment of a calcium aluminophosphate15US 4,321,244 AGroupement Franco-Senagalais d'Etudes et de Recherches Industrielles · 1982
- Process for the preparation of phosphoric acid13US 3,935,298 AMizusawa Kagaku Kogyo Kabushiki Kaisha · 1976
- Process of producing phosphates and phosphoric acid5US 4,154,800 AClimax Chemical Company · 1979
- Process for production of phosphoric acid from dry matrix by SO.sub.3 treatment and extraction2US 4,714,600 AMobil Oil Corporation · 1987