| PATENT ASSIGNEE'S COUNTRY | Japan |
| UPDATE | 02.00 |
| PATENT ASSIGNEE | Showa Denko |
| PATENT CLAIMS | Contacting feed gas contg said compd (0.01-50%), water vapor (20-70%) & O (0-30%) in gas phase with Al oxide catalyst at 300-1000C |
| PATENT PHOTOCOPY | Available on request |
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