Catalyst for anthraquinone hydrogen peroxide process
US4521531A · kind A · utility
7Cited by
1References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 15, 1983 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Aug 15, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A palladium-on-silica catalyst for the anthraquinone-hydroquinone method of preparing hydrogen peroxide is prepared by adding acid solutions of a palladium compound and of an additive metal salt to an aqueous slurry of silica particles, lowering the pH of the slurry to about 0.8-1.0, then incrementally raising the pH of the slurry to 2.3-2.7, to 3.8-4.2, then to 6.8-7.2, and then reducing the palladium compound to palladium metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.