KINETICS OF THE 2 Al(1) plus AlCl3(g) equals 3AlCl(g) REACTION IN THE SUBHALIDE PROCESS OF ALUMINUM.

The kinetics of the reaction was studied by the flow method under a reduced pressure of trichloride at 900 to 1100 degree C. On the basis of the results, reaction rate is expressed in an equation. The apparent activation energy of this reaction was 11. 8 kcal/mol. The reaction ratio of AlCl//3 increased with rising temperature and decreasing trichloride pressure. Aluminum was deposited mostly as small spherical particles in the high temperature zone and dendrites in the lower temperature zone.