Glycerol and spent lye clarification - Illinois Institute of Technology
Glycerol and spent lye clarification - Illinois Institute of Technology
Glycerol and spent lye clarification - Illinois Institute of Technology
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properties <strong>of</strong> an aldehyde, e.g., <strong>of</strong> reducing<br />
armnonlacal silver nitrate, with the fonnation<br />
<strong>of</strong> a mirror <strong>of</strong> metallic silver.<br />
The following test is recommended by<br />
Griinhut (Zeit. Anal. Ohem. , 1899, 37, 38,) as<br />
the best qualitative test for glycerol :-<br />
The substance supposed to contain glycerol is<br />
mixed with twice its weight <strong>of</strong> potassium<br />
hydrogen sulphate <strong>and</strong> strongly heated until it<br />
foams; the vapors are lead into a test-tube<br />
cooled with a freezing mixture. The distil-<br />
late smells strongly <strong>of</strong> acrolein if glycerol<br />
Is present. To confirm, add a few drops <strong>of</strong> a<br />
mixture <strong>of</strong> solutions <strong>of</strong> three grams silver<br />
nitrate in thirty grams <strong>of</strong> ammonia sp. gr«<br />
.923 <strong>and</strong> three grams <strong>of</strong> sodium hydroxide in<br />
thirty grams <strong>of</strong> water. The silver mirror<br />
should form in the cold.<br />
The accurate estimation <strong>of</strong> glycerol in a<br />
complex mixture with other neutral organic<br />
substances <strong>and</strong> with inorganic material, has not<br />
received a satisfactory solution under all<br />
is
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