Abstract: A device for carrying out a chemical reaction by a continuous method has a reactor with at least two reactor sections which define a direction of flow. The reactor has plug flow properties along the direction of flow. A recirculation line is present to withdraw a partial flow from the reactor at a first point and return it to the reactor at a second point located above the first point in the direction of flow. Means are provided which prevent a temperature increase in the reactor over a predetermined temperature range, for example change of more than approximately 50 K.

Abstract: A static mixing device has a flow duct (10) with at least one mixing element (12) arranged in the flow duct (10). Each mixing element (12) has a multiplicity of webs (14A, 14B) which are arranged in a crossed fashion and which enclose an angle (?) of greater than 0° with the longitudinal axis (x) of the flow duct (10). The webs (14A, 14B) are of waisted design between adjacent crossing points (16), and in the middle between adjacent crossing points (16) the webs (14A, 14B) have their smallest width (b) and mutually adjacent webs (14A, 14B) have their greatest intermediate spacing (a).

Abstract: A static mixing device has a flow duct (10) with at least one mixing element (12) arranged in the flow duct (10). Each mixing element (12) has a multiplicity of webs (14A, 14B) which are arranged in a crossed fashion and which enclose an angle (?) of greater than 0° with the longitudinal axis (x) of the flow duct (10). The webs (14A, 14B) are of waisted design between adjacent crossing points (16), and in the middle between adjacent crossing points (16) the webs (14A, 14B) have their smallest width (b) and mutually adjacent webs (14A, 14B) have their greatest intermediate spacing (a).