Process for working up nitric acid
US4344827A · kind A · utility
2Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1980 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Jun 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/19
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for working up aqueous nitric acid which is of a concentration above the azeotropic concentration and contains organic compounds in solution for suspension wherein said nitric acid of a concentration about the azeotropic concentration is distilled off in one or more rectification steps until the azeotropic nitric acid is obtained. In the process, certain specified ratios of nitric acid and water to organic constituents must be maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.