Basf Aktiengesellschaft

Christoph Gahn

Heinz-Walter Schneider

Thomas Fetzer

Matthias Rauls

Christopher William Rieker

Bernhard Otto

Siegfried Bechtel

Richard Van Gelder

Peter Mark Allen

Udo Setzer

Joachim Borgwart

Robert Wagner

An apparatus and a process for crystallizing substances from solutions or dispersions containing these substances, in a crystallizer containing a classifying zone (), comprise The novel apparatus has the special feature that a line () connecting the outer and inner circulation systems () to one another and intended for transporting (recycling) dispersion and/or a line () for transporting (recycling) dispersion are additionally present, in which both its entrance and its exit are connected to the inner circulation system ().

Process for producing crystals

In a process and an apparatus for avoiding encrustations in reactors or crystallizers ( ), such as industrial crystallizers for suspensions ( ), points of incidence ( ) for the excitation of ultrasonic oscillations by sonotrodes ( ) which are connected to electromechanical converters ( ) are provided on the walls ( ) and on the base ( ) of the crystallizer ( ). The ultrasonic frequency is generated at high-frequency generators ( ).

Reduction of encrustation of crystallization processes

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Speyer, Germany

Christoph Gahn