Organic chemical reaction heating method

    Organic chemical reaction heating method

    Organic reactions are the most commonly used is heated by asbestos online, cannot be directly heated by fire. Otherwise the instrument easy to heat non-uniform rupture. If to control the heating temperature, increasing the heating area, the reaction material is heated evenly, avoid local overheating and decomposition, asbestos net heating is not uniform, so in the reduced pressure distillation or refluxing low boiling point flammable etc. operation can’t be applied, it is best to use a proper heating of the heat bath.
     (1) water bath: applicable to the heating temperature is not more than 100 DEG C reaction. If the heating temperature at 90 DEG C, soaked in water heating. If the heating temperature 90-100 degrees available boiling water bath or sauna heating.
    (2) oil bath: heating temperature at 100 DEG C to 250 DEG C, available oil bath. Bath oil has the advantage that is through a temperature control instrument for temperature control in a certain range, reaction material in the container is heated evenly. The reaction temperature in the container generally about 20 DEG C lower than the temperature of the oil bath. Commonly used oil with liquid paraffin, vegetable oil, hydrogenated oil, silicone oil and vacuum pump oil, both in more than 250 DEG C is still stable.
    (3) sand bath: when heating temperature must be reached more than the number of Baidu, often using a sand bath. Clean and clean sand tile on the iron plate, the reaction vessel buried in the sand, heating the iron plate, liquid reaction indirectly heated.
    (4) molten salt bath: when the reaction temperature to several hundred degrees above, but also by a molten salt bath heating. Molten salt at 700 DEG C is stable, but use must be careful prevent splashing to the skin caused by severe burns.
    (5) the electric jacket: heating has become a commonly used laboratory heating device. Especially in the inflammable organic heating and distillation, because it is not open, so it has the advantages of not easy to cause a fire, high thermal efficiency. Through the voltage regulator control in heating temperature, the highest temperature can up to about 400 DEG C.