Preparation of phosphoric acid
US11702338B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 9, 2018 |
| Grant date | Jul 18, 2023 |
| Priority date | — |
| Expiry date | Mar 19, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/329
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a method for the industrial preparation of phosphoric acid from an aqueous suspension comprising water and particles of at least one phosphate material dispersed in the presence of at least one additive of the anionic polymer type. Phosphoric acid is obtained by treating this suspension with at least one strong acid. The polymer is obtained by polymerization reaction of at least one acid selected from acrylic acid, methacrylic acid and salts thereof.The invention relates to the use of this anionic polymer as well as the method for improving the rheology of the suspension and the hydrodynamics of the reaction medium in which the reactions for the manufacture of phosphoric acid take place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.