Laboratory Methods of Organic Chemistry - Sciencemadness Dot Org

CHAPTBE I
THE REPLACEMENT OF HYDROXYL AND HYDROGEN
BY HALOGEN
ALCOHOLS AND OLEFINES
1. ETHYL BROMIDE FROM ETHYL ALCOHOL
ALCOHOL (110 c.c. ; 90 g. of 95 per cent) is rapidly poured with
continuous shaking but without cooling into a round-bottomed flask
(capacity about 1 1.) containing 200 g. (110 c.c.) of concentrated
sulphuric acid ; the warm mixture is then cooled to room temperature,
75 g. of ice-water are cautiously added with continued cooling,
FIG. 46
and finally 100 g. of finely powdered potassium bromide are dropped
in. The reaction mixture is then heated on a small sand bath over
a powerful flame so that a fairly rapid distillation takes place.
Since the ethyl bromide has a low boiling point the longest condenser
available is used along with an adapter or else a coil condenser
(Kg. 46), and a really rapid current of water is passed through.
Before the distillation is begun sufficient water is poured into the
receiver to submerge the end of the adapter and a few pieces of ice
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