Heating Rates

The amount of heat applied to the pot flask (boiler) through the heating mantle is called the heating rate. The heating rate is a percentage (%) of the total heating capacity of the heating mantle.

So if the heating rate is set for 50% and the heating mantle has 1000 watts then then 500 watts of heat is being applied to the pot flask.

Normally, the heating rate is controlled by turning power to the heating mantle on and off. So for a 50% heating rate the heating mantle will be on 50% of the time.

Choosing a heating rate is a balance between purity and distillation speed. Slow distillation rates give higher purity but slower throughput. Fast distillation rates give lower purity but higher throughput. The key is to find the heating rate that gives the required purity of the distillate while having an acceptable throughput.

The The M690 microprocessor allows the heating rate to be preprogrammed for the start up of the distillation, and each temperature fraction. This allows maximum flexibility in optimizing each solvent recycling protocol.

Equilibration Time Reflux Ratio
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Auto Shut Down Temperature
M690 Parameters