For the large size columns above 220g, the thermal effect is obvious in the process of pre-equilibrium. It is recommended to set the flow rate at 50-60% of the suggested flow rate in pre-equilibrium process to avoid obvious thermal effect.
The thermal effect of mixed solvent is more obvious than single solvent. Take the solvent system cyclohexane/ethyl acetate as an example, it is suggested that use 100% cyclohexane in the pre-equilibrium process. When pre-equilibration is completed, the separation experiment could be performed according to the preset solvent system.
Post time: Jul-13-2022