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Glycerol and spent lye clarification - Illinois Institute of Technology

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sulphate, also <strong>of</strong> nickel, cobalt, <strong>and</strong> copper<br />

sulphates is explained by the fact that those<br />

salts combine with three molecules <strong>of</strong> glycerol<br />

to form complex compounds <strong>of</strong> the general<br />

formula (M . 3 C H )S0 . HO. For these<br />

3 O o 4- c<br />

compounds Grxin <strong>and</strong> Bookish proposed the name<br />

glycerinates, to distinguish them from the<br />

metallic glycerides (glyoeroxidee) mentioned<br />

above. The glycerinates are precipitated<br />

from their aqueous solutions by alcohol as<br />

amorphuouB substances.<br />

It has been pointed out that glycerol o<br />

is able to form mono-acid <strong>and</strong> di-acid esters.<br />

These are usually described as monoglyceridee<br />

or diglycerides. They do not occur in nature.<br />

The most important esters <strong>of</strong> glycerol<br />

are those resulting from the combination <strong>of</strong><br />

glycerol with fatty acids.<br />

<strong>Glycerol</strong> also forms esters with inorganic<br />

acids, the most important being those formed<br />

with carbonic, sulphuric, nitric, phosphoric,<br />

boric, <strong>and</strong> arsenious acids. Some <strong>of</strong> these<br />

36

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