Industrial aluminas and hexahydrated aluminum chloride chlorinations by phosgene in LiClKCl eutectic melt at 470°C
✍ Scribed by F. Seon; G. Picard; B. Tremillon
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 641 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The variations of p02during the chlorination by phosgene of industrial aluminas and hexahydrated aluminium chloride were observed by means of an yttria-stabilized zirconia electrode. The curves obtained showed that chlorinations carried out in a continuous flow reactor, take place rapidly (30 min with a phosgenerate offlow of 157 cm3 min-' and a simple bubbler). Transformation of oxychloride to tetrachloroaluminate is the slow step: its specific rate constant k, and its order o[ have been determined (k, = 0.19 mol-I kg s-'; GL = 2). The latter value is interpreted by postulating the involvement of the complex Al,OCl;.
The catalytic effect of the presence of aluminum chloride on the chlorination of the alumina has also been Illustrated.