Other organic bodies containing sulphur are
decomposed in the same fashion, and it has been suggested by Ditz that if
carbide could be obtained at a suitable price, the process might be made
useful in removing sulphur (_i.e._, carbon bisulphide and thiophen)
from crude benzol, in purifying the natural petroleum oil which contains
sulphur, and possibly in removing "sulphur compounds" from coal-gas.
COMPOUNDS WITH COPPER. By far the most important chemical reactions of
acetylene in connexion with its use as an illuminant or fuel are those
which it undergoes with certain metals, notably copper. It is known that
if acetylene comes in contact with copper or with one of its salts, in
certain conditions a compound is produced which, at least when dry, is
highly explosive, and will detonate either when warmed or when struck or
gently rubbed. The precise mechanism of the reaction, or reactions,
between acetylene and copper (or its compounds), and also the character
of the product, or products, obtained have been studied by numerous
investigators; but their results have been inconclusive and sometimes
rather contradictory, so that it can hardly be said that the conditions
which determine or preclude the formation of an explosive compound and
the composition of the explosive compound are yet known with certainty.
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