You know the deal - you're doing a distillation in the lab, but want a fraction that comes over at a very specific temperature. I find it very hard to control the temperature in my air-cooled reflux column. For anyone that's ever had to wrap their reflux column in aluminum foil, you know what I'm talking about.

Is there a piece of laboratory equipment that controls the temperature of the reflux column within a degree or so of an arbitrary setpoint? I'm thinking something like a condenser column (Liebig, Graham, etc) where the water (or other working fluid) that circulates through the jacket also passes through some sort of temperature controller so that the water/fluid keeps the walls of the condenser at a tightly controlled temperature. Any tips on where to find this kind of device?

I know of vacuum-jacketed reflux columns, but I'd prefer something where I didn't need to use a very long tube in order to separate close fractions.

  • $\begingroup$ Back in the day spinning band distillation stills had controls for the pot, column and head. $\endgroup$
    – user55119
    Nov 9, 2020 at 20:05
  • $\begingroup$ Yes, there are (were) electrical patches or bands, similar to thermal blankets in operating principle. $\endgroup$
    – Alchimista
    Nov 10, 2020 at 7:58


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.