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AssigneeEvonik Operations GmbH
InventorsUlf Bindernagel, Catrin Dorothee Becker, Thomas Müller, Martin Köstner, Zhen Li
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It is an object of the invention to specify an electrically heatable reactor for hydrogen cyanide production and the production of other nitriles that enables a differentiated temperature profile and requires no more than inexpensive standard components. The core of the inventive apparatus (0) is a chamber (1) made of gas-permeable, thermally insulating material that constitutes the actual reaction space. Electrical heating elements (5) project into the chamber (1), such that the chamber (1) can be heated from the inside by the heating elements (5). The electrical terminals of the heating elements are outside the reaction space but within the surrounding shell. Unlike in the industrially implemented BMA process, the heat is thus not transported into the reaction space from the outside, but rather generated in the reaction space. The heat is generated by conversion of electrical energy by means of the heating elements (5) by the principle of resistance heating. In order to ensure the gas-tightness of the apparatus (0), a shell (9) is provided, which surrounds the chamber (1) in a gas-tight manner.
Apparatus (0) for production of at least one product gas from at least one reactant gas, especially for the production of nitriles, comprising the following features:
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Apparatus (0) according to any of the preceding claims, characterized in that the electrical heating element (5)
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Apparatus (0) according to any of the preceding claims, characterized by a multitude of electrical heating elements (5) that are electrically interconnected in series and/or parallel connection.
Apparatus (0) according to any of the preceding claims, characterized in that the catalyst has been applied to the surface of at least one electrical heating element (5) in the form of a catalytically active coating.
Apparatus (0) according to any of the preceding claims, characterized in that the thermally insulating wall (2) of the chamber (1) has a multilayer design or wherein the thermally insulating wall (2) of the chamber (1) has a multilayer design and comprises at least two layers that differ with regard to their specific thermal conductivity.
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Apparatus (0) according to any of the preceding claims, characterized in that the heating elements (5), viewed in main flow direction (V), are arranged in succession or arranged offset from another.
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Apparatus (0) according to any of the preceding claims, characterized in that the catalyst contains platinum (Pt).
Apparatus (0) according to any of the preceding claims, characterized in that the heating element (5) comprises a core of silicon carbide or molybdenum silicide, with a protective coating applied to the core and a catalytically active coating applied to the protective coating.
Process according to any of claims 30 to 33, characterized in that the filling gas is selected from the group consisting of the following filling gases:
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Dependencies are inferred from the claim text.