| 摘要 |
<p>RECOVERY OF HYDROGEN CHLORIDE IN CARBO-CHLORINATION OF METAL OXIDES In the conversion of a metal oxide to a metal chloride by reaction with chlorine and carbon monoxide wherein hydrogen chloride is produced as byproduct, the byproduct hydrogen chloride is contacted with a molten salt mixture containing the higher and lower valent chlorides of a multivalent metal and with oxygen to recover the hydrogen chloride by enriching the salt in the higher valent metal chloride. Essentially all of the chlorine values are recovered from the salt by direct contact with all or a portion of the carbon monoxide fresh feed to the metal chloride production, with such carbon monoxide stripping gaseous chlorine from the salt, as well as combining with the chlorine to produce phosgene. The carbon monoxide, chlorine and phosgene are employed in the metal chloride production.</p> |
