Method for producing a catalyst for oxidizing carbon monoxide
US4490482A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Oct 25, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/036
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for recombining oxygen and carbon monoxide in a sealed CO.sub.2 laser includes a stannic oxide base and a coating of at least one metal selected from the group consisting of platinum, palladium, ruthenium, gold and rhodium. The stannic oxide base is produced by preparing a mixture of a stannous salt such as stannous chloride and stannic acid, adding a base to the mixture to produce a mixture of stannic and stannous hydroxide, and adding an oxidizing agent such as hydrogen peroxide to the hydroxide mixture to yield a precipitate of stannic oxide. The stannic oxide is mixed with a catalyst metal salt such as the chloride of one of the metals mentioned hereinbefore, and a reducing agent, e.g. formic acid is added to the oxide and salt mixture to produce the salt, whereby the catalyst metal is deposited on the stannic oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.