Abstract:
The invention relates to a reactor for carrying out heterogeneously catalysed gas phase reactions, comprising an in-built element (11, 35) or multiple in-built elements (11, 35) arranged behind one another in the flow direction of the gas mixture of the heterogeneously catalysed gas phase reaction through the reactor (10), wherein the in-built elements extend over the entire reactor cross-section, characterised in that the one or multiple in-built elements (11, 35) are formed at least partially from a fibre-composite ceramic material.
Abstract:
The invention relates to a reactor (R) with a device (D) containing a gas and/or liquid-permeable base (B) in whose edge region a lateral boundary (W) is arranged which entirely surrounds the base (B) and forms a volume (V), said volume containing catalytic and/or non-catalytic moulded bodies (F), wherein at least one mesh made of noble metal and/or non-noble metal is located on the side opposing the base (B) in the upstream direction, and the catalytic and/or non-catalytic moulded bodies (F) are selected from (i) moulded bodies (F1) in the form of straight prisms whose base surface is selected from a triangle, rectangle, hexagon or fragments of these polygons, or (ii) a combination of the moulded bodies (F1) with moulded bodies (F2) that are smaller than the moulded bodies (F1), characterised in that groups of m to n moulded bodies (F1), where m/n is a whole number between 3-30 and n > m, are bound to form modules (M) in a metal cassette that is open upstream and closed with a gas-permeable base in the downstream direction, with their lateral surfaces side by side practically without a gap and with their longitudinal axis oriented in the vertical direction, such that the cross-section of the base is practically entirely covered, and which modules (M) are joined to one another in a mosaic-like manner practically without a gap, with the vertical orientation of the longitudinal axis of the moulded bodies (F1), optionally with the cooperation of a joint filling material.
Abstract:
The invention relates to a material for sealing cavities between components that are constituted of materials with different temperature behaviors, the material containing an expanding mat. The invention is characterized in that the expanding mat is completely laminated in plastic film and that vacuum conditions are created in the interior space delimited by the plastic film and containing the expanding mat.
Abstract:
The present invention relates to a process for preparing at least one polyisocyanate from a solid material W. The present invention further relates to a production unit for carrying out the aforementioned process as well as a polyisocyanate obtainable or obtained according to the aforementioned process.
Abstract:
The invention relates to a method for removing small quantities of water and other possible components from alkali metal amalgam. Said alkali metal amalgam is brought into contact with an element which is not soluble in mercury and the reaction of the water with the alkali metal amalgam and the other possible components is catalysed to form hydroxides and hydrogen. The catalytically active element is selected from, for example, iron, nickel, cobalt, titanium, chrome, molybdenum, stainless steel, tungsten carbide and graphite.
Abstract:
The invention relates to a device (D), which is accommodated in a reactor (R) and which contains a gas- and/or liquid-permeable bottom (B), in the edge region of which a lateral boundary (W) is arranged, which completely surrounds the bottom (B) and forms a volume (V), which is partially or completely filled with catalytic and/or non-catalytic shaped bodies, at least one network made of noble metal and/or non-noble metal possibly being located on the side lying opposite the bottom (B) upstream, characterized in that a thermally insulating layer (S) is located at least on a part of the surface of the inside of the lateral boundary (W) of the device (D), the material for the thermally insulating layer (S) being selected from the group comprising ceramic material, microporous material, and silicate fibers.