Method of clarifying phosphoric acid using high charge sulfonic-type polymers
US5173280A · kind A · utility
5Cited by
6References
5Claims
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Key dates
| Filing date | Oct 15, 1921 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 1941 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/235
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for clarifying phosphoric acid by flocculation or coagulation of solids wherein an effective amount of a polymer having a predominantly sulfonic functionality is used as the clarification aid. Preferred polymers are high molecular weight acrylamide/acrylamido methylpropyl sulfonic acid-type (AM/AMPSA) polymers which are predominantly AMPSA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.