298         Apparatus  for  Preparing  Ethyl  Bromide,  {"^""•jine^'isso!''"'" 
APPARATUS  FOR  PREPARING  ETHYL  BROMIDE. 
By  Joseph  P.  Remington. 
The  accompanying  cut  represents  the  apparatus  used  in  preparing 
ethyl  bromide  (see  page  248,  May  number  of  this  journal).  It  consists 
of  a  four-liter  flask,  connected  by  a  bent  glass  tube  with  a  condenser. 
The  cork  is  perforated  to  accommodate  a  thermometer  and  a  small 
glass  tube  for  the  introduction  of  the  alcohol. 
The  diluted  sulphuric  acid  is  introduced,  the  potassium  bromide 
added,  and,  after  making  the  connections  tight,  heat  is  applied  until  the 
contents  of  the  flask  show  the  temperature  of  ii6°C.  The  alcohol^ 
contained  in  a  bottle,  is  elevated  above  the  flask,  and,  by  means  of  a 
siphon  tube  and  pinchcock,  is  slowly  fed  into  the  flask,  care  being 
taken  to  adjust  the  flow  of  liquid  and  the  heat  so  that  the  temperature 
range  between  100°  and  ii6°C.  The  advantage  of  this  process  is  that 
the  decomposition  takes  place  at  a  temperature  that  can  be  controlled 
with  ease,  and  the  formation  of  ethyl  bromide  goes  on  regularly  and 
without  danger  or  risk.  This  apparatus  may  doubtless  be  serviceable 
for  making  other  ethyl  compounds. 
