The preparation of salicylic acid from phenol
The preparation of salicylic acid from phenol
The preparation of salicylic acid from phenol
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<strong>acid</strong> are: <strong>phenol</strong>, creosotic <strong>acid</strong> due to impure<br />
<strong>phenol</strong>, para-hydroxy-benzoic <strong>acid</strong> and a-hydroxy-<br />
Iso-phthalic <strong>acid</strong> due to the presence <strong>of</strong> caustic<br />
BOda and to a too high or too low temperature<br />
in the manufacture.<br />
<strong>The</strong> presence <strong>of</strong> a small amount <strong>of</strong> Jm-<br />
puritiee causes the <strong>acid</strong> to crystallize <strong>from</strong><br />
dilute alcohol in the form <strong>of</strong> a mass <strong>of</strong> inter-<br />
laced crystals instead <strong>of</strong> well defined large<br />
prisms.<br />
It is quite clear that with proper<br />
conditions present, the yield depends on the<br />
pressure. However, the highest pressure ob-<br />
tainahle with the equipment on hand v.as 75 lbs.<br />
per sq. in. , therefore no further runs were<br />
attem'oted.<br />
37.
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