Abstract:
Vorgeschlagen wird ein Reaktor (R) zur Durchführung einer Dreiphasenreaktion einer flüssigen Phase (1) und einer gasförmigen Phase (2) an einem Katalysatorfestbett (F), wobei das Katalysatorfestbett (F) horizontal im Reaktor (R) angeordnet ist und die flüssige Phase (1) und die gasförmige Phase (2) im Gleichstrom von oben nach unten über eine Misch- und Verteileinrichtung (MV) über das Katalysatorfestbett (F) durch den Reaktor (R) geleitet werden, der dadurch gekennzeichnet ist, dass die Misch- und Verteileinrichtung (MV) einen Trogverteiler (TV) für die flüssige Phase (1) umfasst, mit trogförmigen Kanälen (K), und Ablaufröhrchen (A) in den trogförmigen Kanälen (K) für die flüssige Phase (1), sowie einen unterhalb des Trogverteilers (TV), von diesem beabstandet angeordneten Verteilerboden (B), in den vertikal Tüllen (T) eingebracht sind, mit einer oder mehreren Öffnungen (P1) für den Eintritt der gasförmigen Phase (2) und einer oder mehreren Öffnungen (P2), die unterhalb der Öffnungen (P1) für den Eintritt der gasförmigen Phase angeordnet sind, für den Eintritt der flüssigen Phase (1) in die Tüllen (T), und wobei die Anzahl und die Größe der Öffnungen (P2) für den Eintritt der flüssigen Phase (1) so ausgelegt sind, dass sich bei vorgegebenen Flüssigkeitszulauf der Flüssigkeitsspiegel auf dem Verteilerboden (B) unterhalb der Öffnungen (P1) für den Eintritt der gasförmigen Phase (2) und oberhalb der Öffnungen (P2) für den Eintritt der flüssigen Phase (1) einstellt.
Abstract:
The invention relates to a reactor (R) for performing a three-phase reaction of a fluid phase (1) and a gaseous phase (2) on a packed bed catalyst (F), the packed bed catalyst (F) being disposed horizontally in the reactor (R) and the fluid phase (1) and the gaseous phase (2) being fed through the reactor (R) from the bottom to the top, using a mixing and distributing device (MV) across the packed bed catalyst (F), characterized in that the mixing and distributing device (MV) comprises a trough distributor (TV) for the fluid phase (1) having trough-shaped channels (K) and drain tubes (A) in the trough-shaped channels (K) for the fluid phase (1), and a distributor floor (B) disposed below and at a distance from the trough distributor (TV) in which vertical spouts (T) are disposed, having one or more openings (P1) for the inlet of the gaseous phase (2) and one or more openings (P2) disposed below the openings (P1) for the inlet of the gaseous phase, for the inlet of the fluid phase (1) into the spouts (T), and the number and size of the openings (P2) for the inlet of the fluid phase (1) being designed such that the fluid level on the distribution floor (B) is adjusted to be below the openings (P1) for the inlet of the gaseous phase (2) and above the openings (P2) for the inlet of the fluid phase (1) for a prescribed inlet flow of fluid.
Abstract:
The invention relates to a method for the catalytic production of melamine by the decomposition of urea in particular on solid catalysts using a main and post reactor. A catalyst of low Lewis acidity is employed in the main reactor and in the post reactor a catalyst is employed with the same or preferably a greater Lewis acidity.
Abstract:
The invention relates to a reactor (R) for performing a three-phase reaction of a fluid phase (1) and a gaseous phase (2) on a packed bed catalyst (F), the packed bed catalyst (F) being disposed horizontally in the reactor (R) and the fluid phase (1) and the gaseous phase (2) being fed through the reactor (R) from the bottom to the top, using a mixing and distributing device (MV) across the packed bed catalyst (F), characterized in that the mixing and distributing device (MV) comprises a trough distributor (TV) for the fluid phase (1) having trough-shaped channels (K) and drain tubes (A) in the trough-shaped channels (K) for the fluid phase (1), and a distributor floor (B) disposed below and at a distance from the trough distributor (TV) in which vertical spouts (T) are disposed, having one or more openings (P1) for the inlet of the gaseous phase (2) and one or more openings (P2) disposed below the openings (P1) for the inlet of the gaseous phase, for the inlet of the fluid phase (1) into the spouts (T), and the number and size of the openings (P2) for the inlet of the fluid phase (1) being designed such that the fluid level on the distribution floor (B) is adjusted to be below the openings (P1) for the inlet of the gaseous phase (2) and above the openings (P2) for the inlet of the fluid phase (1) for a prescribed inlet flow of fluid.