What is a Rotary Evaporator?

The rotary evaporator, commonly called rotary evaporator, is a equipment used in organic chemical laboratories, and indispensable for the efficient and smooth removal of solvents from evaporative samples. Usually, in laboratories the equipment is applied to perform examinations, experiments and chemical, medical and biological procedures. Likewise, they are used in different areas and institutions such as: chemical industry, pharmaceutical industry, laboratories and hospital sector.

Rotary evaporators are the ideal way to have intelligent evaporation in the laboratory. They are perfect for all standard distillations, as well as more complex applications and automated distillations.

Rotary Evaporator Functions

Rotary evaporators are based on a modular concept and allow you to create your own customized system, combining the rotary evaporator with the vacuum pump and refrigerator of your choice. They are designed to be safe and comfortable to use, as well as reduce the cost of use and maintenance, which is reflected in a number of unique advantages to this product.

It has the main components of a rotary evaporator, which are:

  • Motor unit, which rotates the evaporative flask or the vial containing the user sample.
  • Steam duct, which is the axis for sample rotation, and is a vacuum-proof duct for steam to be extracted from the sample.
  • Vacuum system, to substantially reduce pressure within the evaporator system.
  • Heated fluid bath, (usually water) to heat the sample.
  • Condenser with a coil that passes refrigerant, in which mixtures of refrigerant such as dry ice and acetone are placed.
  • Condensate collection flask at the bottom of the condenser to trap the distillation solvent after it is re-condensed.
  • Mechanical or motorized mechanism to quickly lift the evaporative flask from the heating bath.

The rotary evaporator is designed to achieve maximum distillation efficiency with an excellent level of safety, because it agrees to operate at low temperatures, clarity that reaches due to its ability to work, with adequate levels of vacuum, achieved with state-of-the-art seals and a condenser of great efficiency on its condensing surface.

In addition, it allows a flexible use adapted to the needs of the user with a variety of tasks, through the principle of automated operation and control of pre-programmed processes.

Applications and use of the Rotary Evaporator

The rotary evaporator allows the solvent to be efficiently separated from a sample without damaging it and is carried out at low temperatures. This process is often described as โ€œevaporating the sample at reduced pressureโ€.

In addition, it allows the separation and purification of solutes. As well as fractionated distillations of solvent mixtures, quantification of solid-liquid or liquid-liquid mixtures, organic synthesis and solvent evaporation.

Such equipment is widely used in various industries and institutions, such as:

  • Chemical industry.
  • Pharmaceutical industry.
  • Food industry.
  • Laboratories.
  • Hospitals.

The purpose of the rotary evaporator is to separate solutes and solvents by evaporation. The rotation of the balloon allows the product to be extracted to generate a very thin film on the glass walls, which contributes to the evaporation rate. It is operated with a vacuum pump, to operate at reduced pressure, allowing to work at lower temperatures.

Kalstein Rotary Evaporators

At Kalstein, we are manufacturers of the most comprehensive technology in trained laboratory equipment, to meet all the demands of our customers. In this case, we offer you the Rotary Evaporators belonging to the YR series, with general, attractive features, such as; patented technology of double Teflon Sealing (PTFE) and FV rubber ensures the level of negative pressure. Automatic switching valve for continuous collection, without affecting the vacuum degree and without stopping distillation. Teflon discharge valve, corrosion resistant and pollution free. Water bath jacket, which protects the operator from burns by hot liquid.

In addition, we offer extensive advice, with the best experts, so that your purchase is ideal and at excellent prices. To learn more about our catalog, visit HERE

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