Some Basic Experiments of Acetylene Purifier (Report 2)

Nickel Chloride, Zinc Chloride, Sodium Chloride and Calcium Chloride

Abstract

As stated in a previous report, when we used liquid purifiers consisting of ferric chloride or cupric chloride, chemical reaction to fix the phosphine was done by self catalizing action of mercuric chloride.
Regeneration is made completely by dissolving the precipitate. Like these metals, tin has two valency, but if stannic chloride is used, purifying power is distinctly inferior to ferric chloride owing to insoluble H₂SnO₃ is formed.
In this report, we determined the powers of nickel and zinc chloride which have one valency.
According to our experiments, it is cleared that both chlorides have same purifying action. Oxidation and reduction of chloride can not be reported, but these powers are superior to mercuric chloride solution. When passing crude acetylene through the nickel or zinc chloride, we suggest the following chemical reaction may be proceeded.
MCl₂+PH₃→M₃P₂+HCl
Regeneration of power is regarded as following reaction.
M₃P₂+HCl→H₃PO₄+MCl₂+HCl
The aqueous solution of alkaline earth metal salts is more stable than other salts, so that it is scarcely attacked by phosphine.