Catalytic synthesis of triazine compounds using a flexible technology |
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Authors: | Kurylev A Yu Beskov V S Pravdin A I Golosman E Z |
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Affiliation: | 1.Novomoskovsk Institute, Mendeleev University of Chemical Technology of Russia, Novomoskovsk, Russia ;2.Mendeleev University of Chemical Technology of Russia, Moscow, Russia ;3.OOO NIAP-KATALIZATOR, Novomoskovsk, Russia ; |
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Abstract: | Based on laboratory pilot studies, we have developed a flow sheet for the catalytic synthesis of triazine compounds from carbamide
using a flexible technology and a catalyst for this process. The main process parameters are as follows: a carbamide melt
is fed into the reactor under a pressure of 0.8 MPa at 140–160°C; the volume rate of feeding the circulating gas into the
reactor is 500–750 h−1, its temperature is 350–500°C, and the melt-to-gas mass ratio is 1: (7–9). The temperature of synthesis in the reactor is
350–450°C; the pressure in the reactor is 0.1–0.2 MPa. The sublimation temperature is 180–200°C. The conversion of carbamide
is ∼98%. The content of the target component in the product is ∼98.8%. Depending on the composition of the circulating gas,
it is possible to obtain products of melamine, cyanuric acid, or melamine cyanurate. A catalyst in the form of promoted active
aluminum oxide with an inner surface of 300 to 400 m2/g and a technique for its preparation have been developed. |
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