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lab scale – ACR

Coflore ACR  – lab flow reactor

The ACR combines mechanical stirring with a high number of reaction stages. This decouples mixing and orderly flow from residence time providing excellent performance for reaction times from seconds to hours.

  • Working capacity 8 to 80 millilitres
  • Reaction time of 10 seconds to >8 hours
  • Co-current and counter-current flow
  • Slurries, immiscible fluids and gas/liquid mixtures
  • Plug flow equivalent to 10 stirred tanks in series
  • Mass transfer rates 1 -2 orders of magnitude better than large batch reactors.




Freely moving agitators within the reaction cells generate mixing when the body of the reactor is subject to lateral oscillation. This eliminates the need for rotating shafts, baffles and mechanical seals. Unlike passively mixed flow reactors, high shear and fast blending is maintained independently of reaction time.

Orderly flow


The ACR employs ten reaction cells to give a high degree of orderly flow. Each cell has a side addition port for measuring temperature or adding reactants



The reaction cells are arranged in a vertical cascade with short horizontal inter-stage channels. This provides a fully draining  pocket free channel with low hold up volumes between stages. Homogenous fluids can flow up or down through the reactor. Where gas is present either as a reactant or product, up-flow is used to prevent gas accumulation. Down-flow is used where settling solids are present.

Counter current


The counter current reactor block is interchangeable with the standard reactor block and is used when materials need to flow in two directions. This applies to counter current operations such as extraction or counter current reactions. It can also be used with three phase mixtures with solids and liquids flow down but allowing gas to flow up.

Multi step


The ACR can be used as single 10 stage system or multiple unit operations in series with intermediate addition points.

Heat transfer


The heat transfer plate mounted on the back of the reactor block uses discrete heat transfer cells aligned with the reaction cells. Mechanical stirrers within the heat transfer cells generate excellent heat transfer even with low powered heat transfer fluid pumps.

Temperature control


The heating/cooling load in a flow reactor varies through the system as the reaction rate changes. Compensating for the varying heating or cooling load can add considerable complexity to the control system. The ACR provides a uniquely simple solution by means of flow regulated temperature control. This is made possible by virtue of multiple mixed stages.


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