乙醇提纯 的工艺和方法==(2)

清理实验现场。

( For water bath pot, heat on pot on the metal will baths, iron ring down alcohol lamp, alcohol lamp to adjust devolved wood, fire height, will distillation unit installed, will water is put to round bottom flasks sphere 2/3 place.

Take down the thermometer casing, with long neck funnel will inject round bottom 60ml industrial alcohol, join in a flask 2-3 grain of zeolite, and add a little lime, mount reflux condenser pipe, the top pick calcium chloride dry tube

Start with small fire when heated, observation of liquid, and note the thermometer readings, when steam rising to thermometer mercury department, thermometer readings sharply reduce a little flame, appropriate.

When the thermometer readings rise to 64.. 5 degrees or so, change a clean, dry accept bottle dry after liquid pipe, control heating temperature, collect fractions, thermometer water during distillation has arguably, keep Ames points droplets out per second for speed 1-2 drop. Continue to heating, when the thermometer readings went up to 78 degrees or so and stable, another a clean, dry accept bottle dry after liquid pipe, control heating temperature, collect 79 degrees distillate fractions of 77, when the temperature suddenly slumps or flask to stop when the little liquid in the heat, cold, closed after a fraction of condensed water collected from industrial alcohol.

Clean up the scene. )