One of the primary techniques for separating the constituent parts of a solution based on their differing thermodynamic properties is short-path distillation. This process involves the selective heating to encourage separation, when housed in a flask at low pressure. These vapors then travel a short distance, through extraction feeds concentrating distinct compounds based on distillation temperature. Thus, this enables the achievement of distillate purity levels of up to 99%.
To selectively separate the fluid’s compartments through short-path distillation, what is required is a robust understanding of the thermomechanical properties of the compounds. The measurement of vapor temperatures in real-time using a vapor monitor is the most reliable and quantitative method for establishing short-path distillation experiment parameters that are reproducible. Vapor monitoring is a more qualitative technique, preferred over the assessment of performance levels by the distillate’s colorimetric properties.
Vapor Monitors in a Short-Path Array
Using a type J thermocouple input jack, a vapor monitor is attached to the primary solution flask in a short-path distillation array. Once the iron—constantan junction of the thermocouple reaches the temperature values of vapors in the flask, these are then converted into an electrical value that is displayed in real-time.
Naturally, this is one of the most critical aspects of short-path distillation, since the vapor temperature is a fundamental component in the success of extraction.
A compact instrument, Glas-Col’s vapor monitor is equipped with a user-friendly LED display. Moreover, the device features an adjustable grid bracket that enables its integration into bespoke distillation packages. Nevertheless, the entire component weighs just 2 lbs and is thus ideal for mounting the vapor monitor prominently – either at eye-level or above.
What’s more, the vapor monitor’s digital functionalities include setpoint inputs for low or high temperatures across a broad temperature span.
The Glas-Col vapor monitor is also equipped with an audible alarm, thus allowing fine-tuning of the experiment conditions and simultaneously improving process automation. Needless to say, this is a critical feature that ensures experiments are carried out safely, reliably, and under reproducible conditions.
Glas-Col Vapor Monitors
Glas-Col specializes in developing and supplying advanced process monitoring equipment for a wide variety of applications. The firm offers a comprehensive catalog of solutions for short-path distillation – including a TM stir mantle, heating tops, sensors, splash guards, temperature controls, and a high-sensitivity vapor monitor.