Cleaning of filter surfaces
US4857211A · kind A · utility
11Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1987 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | May 7, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/223
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Encrusted filter surfaces that have been used for filtering wet process phosphoric acid slurries are effectively cleaned, e.g., of crystalline deposits, by washing same with a solution of fluosilic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.