Definition Reacting

The term reaction is defined as being the interaction at microscopic level (i.e. between molecules and atoms) between chemical elements and/or chemical compounds, leading up to a material transformation (RÖMPP Chemical Lexicon).

Range of application of Lodige reactors

The Lodige reactors are used for products of liquid, pasty, lumpy or free flowing consistency. Reactions in both homogeneous and heterogeneous phases can be carried out in any combination of solid/liquid/gas.

Mode of operation of Lodige reactors

Lodige reactors operate in the same way as Lodige ploughshare® mixers. Ploughshare® shovels rotate on a horizontal shaft in a cylindrical drum creating in this way a mechanically generated fluid bed. This results in very intensive interaction of the reactants and intensive contact with the jacketed drum surface.

The aim of a chemical reaction is to obtain a 100 % transformation of the reaction agents. This practically occurs automatically if the reaction agents have a high chemical affinity for each other. However, other reactions require specific operating or reaction conditions.
Parameters like temperature and pressure are well known, but the influence of dispersivity or dispersion is less known. Tests in Lodige DRUVATHERM® reactors compared to classical autoclaves clearly prove that reactors are more effective due to defined, homogeneous mixing of the product. Reactions in a DRUVATHERM® DVT are carried out more rapidly, ensure gentle treatment of the product and provide higher yield. The transformation is therefore more successful and entails less undesirable by-products, which means that the process is more effective and the end product of higher purity. This is also proven by catalyst assisted reactions. The use of auxiliary chemicals, solvents and energy can be considerably reduced in many cases and the production process made more economic.

Reaction process

Lodige Reactors are particularly suitable for reactions in which one or more solid components are present. The DRUVATHERM® Reactors are designed for a temperature range up to 600°C and a pressure range up to 50 bar.

During exothermic reactions the heat can be removed by means of the temperature jacket (cooling) or via evaporation of the liquids. Endothermic reactions are carried out quicker due to the effective heat exchange. Drying or cooling for further processing can be carried out straight away in the same machine during or after the reaction.

Advantages of Druvatherm® Reactors

  • High speed mixing of reactants
  • Prevention of local over concentration
  • No temperature gradients in the reaction field
  • Excellent control of process parameters
  • Additional processes possible (cooling, heating, drying, granulation, mixing, coating)

Machines for Reacting

Lödige reactors are available in different designs and are made according to the customer's product and processes. Please find the appropriate machines for reacting processes below:

Lödige DRUVATHERM® VT Laboratory Shovel Dryer

DRUVATHERM® Vacuum Shovel Dryer


Continuous CGT Granulator Dryer DRUVATHERM


Fluid Bed System

Fluid Bed Processor LFP


Always the right mix

Always the right mix

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