A Manual of Inroganic Chemistry Arranged to Facilitate the Experimental Demonst
A Manual of Inroganic Chemistry Arranged to Facilitate the Experimental Demonst
Eliot Charles William
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Knead into the mixture enough oil to render it plastic, and from the* thick paste thus formed make a number of small balls or pellets ; roll these pellets in powdered charcoal, place them in a Hessian crucible, cover the crucible, and heat in a strong fire until all the oil has been distilled off or decomposed. The mixture of silicic acid and charcoal is thus left in an open porous condition, well adapted for the action of the chlorine. Place the dry pellets in a porcelain tube about 2 c. M. In... diameter, connect one end of the porcelain tube with a U-tube sur- rounded with a freezing mixture of ice and salt, and to the other end attach a flask in which to generate chlorine, taking care to interpose between this flask and the porcelain tube one U-tube filled with pumice- stone, soaked in oil of vitriol, and another filled with chloride of cal- cium, in order that the gas may be thoroughly dried. Place the porcelain tube in a suitable stove or furnace ; pass into it a slow current of chlorine, in order to expel the air, and then build around it a hot fire of charcoal or coke ; finally, when the tube has become heated to intense redness, pass in the chlorine as fast as it is absorbed.
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