Process for the preparation of an ultra pure hydrogen peroxide solution by ion exchange in the presence of acetate ions
US6001324A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Jun 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B15/0135
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a process for the preparation of an ultrapure hydrogen peroxide solution to be purified through at least one bed of anion-exchange adsorbents and at least one bed of cation-exchange adsorbents. The at least one bed of anion-exchange adsorbents contains carboxylate ion of formula R--COO.sup.- in which R represents a hydrogen atom, an aryl radical containing from 6 to 10 carbon atoms or an alkyl radical containing from 1 to 4 carbon atoms. The aryl and alkyl radicals are either unsubstituted or substituted by one or more fluorine atoms. A first bed of the at least one bed of anion-exchange adsorbents through which the solution to be purified passes is a bed containing carboxylate ions of formula R--COO.sup.-. Also provided is a plant for the implementation of the inventive process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.