Plate type reactor for heat exchange

Reactor structure comprise a stack of heat conducting plate elements (1a-1d) running on two closed side regions in a U-shape and arranged with its U-side edges lying over each other in the stack. The reactor layers are formed as tempering layers (3). Preferred Features: The plate elements have planar main surfaces and run in a curved manner on the closed side regions so that the inner side edges (6a) and the outer side edges (6b) are displaced from the main plate main surface.