Refining Bismuth by Distillation and Chlorination

The experiments described show that crude bismuth metal containing up to 5 percent lead, 0.14 per cent s1lver, 0.015 per cent copper, 0.02 per cent iron, .and small amounts of antimony, nickel, and tm may be refined to a bismuth content of 9 .98 per cent by distillation followed by chlorination. It also is shown that bismuth trichloride of high, purity may be produced by passing chlorine over hot crude bismuth metal and allowing the resulting vapours to condense in a cooler .part of the system.
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