Catalyst and process for direct catalystic production of hydrogen peroxide, (H2O2)
US6168775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Aug 26, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0211
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A particulate supported noble metal phase-controlled catalyst material having 5-1000 .mu.m surface area of 50.mu.500 m.sup.2 /gm is provided for use in direct catalytic production of hydrogen peroxide (H.sub.2 O.sub.2) product from hydrogen and oxygen-containing feedstreams. The catalyst is made by depositing phase controlled crystals of a noble metal such as palladium on a suitable particulate support material such as carbon black, by utilizing a precursor solution of the metal and a suitable control ionic polymer having molecular weight of 300-8000 such as sodium polyacrylate in a selected metal to polymer molar ratio of 1:0.1 to 1:10, which procedure provides desired phase control of the noble metal atoms to form widely dispersed minute noble metal crystals on the support material. The invention includes methods for making the catalyst, and also a process for utilizing the catalyst to directly produce high yields of hydrogen peroxide (H.sub.2 O.sub.2) product from hydrogen and oxygen-containing gaseous feedstreams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.