Production of phosphates
US4228140A · kind A · utility
0Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/2343
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Various stages of the process of producing phosphates are subject to a vacuum produced by a liquid ring pump in various materials of construction using relatively high concentrations of sulfuric acid as the compressant liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.