| 摘要 |
<p>PURPOSE:To maintain the activity of a catalyst for a long period by supplying raw gas to a fluidized bed by a specified method when chlorine is produced by the reaction of hydrogen chloride with oxygen by using a chromium oxide catalyst in the fluidized-bed reactor. CONSTITUTION:The salt of trivalent chromium is precipitated by a basic compd. to obtain chromium hydroxide, and the chromium hydroxide is baked to prepare the catalyst consisting essentially of chromium oxide. Hydrogen chloride is allowed to react with oxygen in the fluidized-bed reactor wherein the catalyst is packed, and chlorine is produced. In such a case, the raw materials are separated into the raw gas to be supplied to the fluidized bed as oxygen source and the gas to be used as the hydrogen chloride source, and the former is supplied to the lower part of the latter.</p> |
