Drying – Processes and Procedures

Wet Chemical Products and Drying Processes

Drying processes cover the removal of undesirable liquid components from a product – by evaporation, drying agents or other technical and chemical processes. The challenge is to strike a balance between drying as effectively as possible and the protection of the product. Increased temperatures speed up drying, while excessive heat can damage the targeted product properties.

After synthesis, our wet chemical products are usually available in dissolved form and must be dried in order to achieve the required purities or to be available as a solid for final use. Another important aspect is the easier handling of powders and the reduced weight after drying, which makes shipping much cheaper. In the case of BNT, the component to be removed is usually water.

Drying Technology and Processes

At BNT you will find technology for the various drying processes required to work with wet chemical syntheses and (wet) powders. With IBU-tec, however, our company group still offers extensive capacities in the drying and thermal treatment of bulk materials: At the sites in Weimar and Bitterfeld, you will find an extensive plant park of rotary kilns and pulsation reactors for development projects and production.

Contact Dryer

The product is dried by contact with a heated surface: The liquid portion evaporates, leaving behind a powder.

  • Paddle dryer
  • Screw dryer
  • Drum dryer
  • Roller dryer

Vacuum Dryer

  • Efficient drying times at low temperatures
  • Pressure is reduced so that liquid evaporates, the resulting vapor is sucked off and the material is dried homogeneously
  • Vacuum reduces the required temperature

Spray Dryer

  • For processing suspensions, solutions or emulsions into powders
  • Material is atomized and swirled in hot air.
  • Particle size can be influenced
  • Very fast and homogeneous drying without any loss of quality

Drying Technology

  • Centrifugal dryer
  • Fluidized Bed
  • Conical dryer
  • filter presses