Glycerol and spent lye clarification - Illinois Institute of Technology

circumstances. The problem ia complicated "by
the fact that solutions of glycerol can not be
highly concentrated (see elsewhere) without
serious loss from volatilization, and that the
presence of glycerol naturally increases the
solubility of many substances in aqueous and
alcoholic solutions.
In general the first step in the estima-
tion of glycerol consists in separating it
from other substances with which it is mixed
or combined so as to obtain it in a state of
approximate purity. This can often be effect-
ed qualitatively in a very satisfactory
manner, but it too often happens that the
evaporations which are necessary steps in the
process cause such a loss of glycerol by
volatilization as to render the result of
little value for quantitative purposes.
Proteins and some other foreign substances
may be separated from a solution containing
glycerol by adding a solution of basic lead
acetate and then filtering them out of the
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