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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glycerol <strong>and</strong> water are mieclble in all pro-<br />
portions, the composition <strong>of</strong> the escaping<br />
vapors cannot be calculated according to<br />
Dalton's well known law, but lEust be derived<br />
from actual observations. Gerlach determined,<br />
with the aid <strong>of</strong> a vaporirceter, in which the<br />
pressure <strong>of</strong> the vapor was measured by a column<br />
<strong>of</strong> mercury, the vapor pressures as given in<br />
the appendix.<br />
Prom the table an approximate measure<br />
can be derived aa to the losses that may be<br />
inctirred on evaporating dilute solutions <strong>of</strong><br />
glycerol.<br />
Experiments showed that up to a con-<br />
centration <strong>of</strong> about 50 ^ no glycerol escapes<br />
with the water vapors, even if the dilute<br />
solutions be kept boiling for some little<br />
time. At a concentration <strong>of</strong> about 70 ^<br />
traces <strong>of</strong> glycerol escape from the boiling<br />
solution. (Hehner.) The boiling point <strong>of</strong><br />
such a solution is 11S.6° C. (See table.)<br />
Above this concentration notable amounts <strong>of</strong><br />
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