Phosphoric acid purification
US3947499A · kind A · utility
5Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Jan 30, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/234
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A solid anhydrous 1:1 molar compound of phosphoric acid and diisopropyl ether is prepared from a mixture of the ether and phosphoric acid in a molar ratio (R:1) of 0.6:1 to 1.4:1 at a temperature at least as low as the crystallization temperature (T.degree.C) governed by the relationship T = 25(1.2-R). Treatment of the compound with water or a base produces purified acid or a phosphate respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.