Method of clarifying phosphoric acid
US5318707A · kind A · utility
3Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Aug 28, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for clarifying phosphoric acid by flocculation or coagulation of solids wherein an effective amount of a carboxylic-type polymer having a portion of sulfonic functionality is used as the clarification aid. Preferred polymers are high molecular weight acrylic acid/acrylamido methylpropyl sulfonic acid-type polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.