Process for preparing a substantially pure aqueous solution of hydrogen peroxide
US5705040A · kind A · utility
Inventors
Key dates
| Filing date | Feb 15, 1996 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Feb 15, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/15
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing a substantially pure aqueous solution of hydrogen peroxide is described. An impure hydrogen peroxide solution is vaporized in a vaporizer to form a vapor containing hydrogen peroxide and a concentrated hydrogen peroxide solution in equilibrium therewith. The solution also contains impurities. A substantially pure hydrogen peroxide solution is obtained by a partially condensing the vapor containing hydrogen peroxide. In addition to the solution, a residual vapor, in equilibrium with the solution and having a lower hydrogen peroxide concentration, can be condensed in a separate condenser. The concentration of the hydrogen peroxide solution obtained by the process can be regulated, for example, by regulating the condensation efficiency of the partial condensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.