The synthetic dyestuffs and the intermediate products from which they are derived (1920)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872- · London : C. Griffin · leaf 241
ion of solids a flask fitted with a wide curved tube is used (fig. 7). Die Destination unter vermindertem Druck im Labor atorium, Anschiitz. 2l6 SYNTHETIC DYESTUFFS. In order to observe the pressure in the distillation apparatus a manometer isinserted at a convenient point (fig. 8). The difference… … Fig. 8. corks, however, may be made quite tight by coating them when in position withcollodion. The flask, which should not be of more than 250 c.c. capacity, isbest heated by either a metallic air-bath (iron crucible) or a metal bath. Thelowering of the boiling-point by a reduction of pressure to…
Dyes and dyeing
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