| 摘要 |
<p>A fluoro-aromatic compound, particularly a fluorobenzene, is prepared by contacting a chloro-aromatic compound, particularly a chlorobenzene, with hydrogen fluoride in the vapour phase in the presence of a zinc-promoted fluorination catalyst. A preferred catalyst is a chromium-containing catalyst such as chromia, chromium fluoride and/or chromium oxyfluoride.</p> |
