Fluidized molten salt bath

The Beckmann rearrangement in superheated and SCH2O was performed at temperatures of 250-400 °C at fixed densities of 0.35 and 0.50 g/mL. The experiments were conducted using a batch reactor system. The reactor vessel was made from a piece of SUS 316 tubing, providing an internal volume of 10 cm A predetermined amount of reactant solution (cyclohexanone-oxime of 0.44 mmol and water of 0.20 or 0.28 mol) was loaded into the reactor in N2 atmosphere. The reactor vessel was immersed and vigorously shaken in a fluidized molten salt bath. The heating time to raise the reactor temperature from 20 °C to 400 °C was within 30 s and the temperature was controlled within 2°C. After a preselected reaction time of 3 min, the reactor was removed from the bath, and then quenched in a water bath. 

The above reactions, which arc highly Exothermic, take place in the presence of a catalyst This catalyst may be in a fixed bed in multi-tube reactors with 5,000 to 20,000 tubes. Heat is removed by means of a coolant fluid consisting either of a bath of molten salts (nitrate/nitrite), or the sodium potassium eutectic opmating between 360 and 420 C. The catalyst may also be used in a fluidized bed traversed by cooling systems (coils, etc.). The heat generated is used to produce high-pressure steam. 

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