Process for preparing an ambient temperature molten salt using thionyl chloride

摘要

There are disclosed a process for preparing an ambient temperature molten salt, which comprises treating an ambient temperature molten salt consisting essentially of 20 to 50 mole % of an aluminum halide and 80 to 50 mole % of an onium halide, containing oxygen-containing impurities originating from water with thionyl chloride and a process for preparing an ambient temperature molten salt for effecting aluminum electroplating, which comprises treating mixed ambient temperature molten salts consisting essentially of 30 to 50 mole % of an aluminum halide and 70 to 50 mole % of an onium halide, containing oxygen-containing impurities originating from water with thionyl chloride, and then adding aluminum halide to the molten salt to prepare an ambient temperature molten salt composition consisting essentially of 50 to 80 mole % of an aluminum halide and 50 to 20 mole % of an onium halide.