| 摘要 |
<p>1287349 Producing aluminium APPLIED ALUMINIUM RESEARCH CORP 23 Sept 1970 [29 Sept 1969] 45236/70 Heading C7D Aluminium is produced by the reaction of aluminium trichloride and manganese, contacted in counter-current flow. AlCl 3 may be introduced as a gas and Mn as a liquid, liquid Al and a gaseous mixture of AlCl 3 and MnCl 2 being recovered. Some of the liquid Al may be recycled to the liquid Mn inlet to lower the fusion point of the liquid Mn. MnCl 2 may be condensed from the gaseous mixture and the remaining AlCl 3 recycled. The contact may take place in a packed column, a tray column, a spray column, or a wetted wall column. Alternatively, the reaction may take place in a series of reactors containing molten Mn through which AlCl 3 gas is bubbled; the excess AlCl 3 from each reactor being passed into the next in the series, after MnCl 2 vapour present is condensed out. The process is continued until the first reactor contains Mn-free Al; this reactor is then removed, and a reactor containing liquid Mn is added to the end of the series.</p> |
