Abstract: A method for producing a shell catalyst is provided which comprises a porous catalyst support shaped body with an outer shell in which at least one transition metal in metal form is contained, comprising: providing catalyst support shaped bodies; applying a transition-metal precursor compound to an outer shell of the catalyst support shaped bodies; and converting the metal component of the transition-metal precursor compound into the metal form by reduction in a process gas at a temperature of from 50 to 500° C., wherein the temperature and the duration of the reduction are chosen such that the product of reduction temperature in ° C. and reduction time in hours lies in a range of from 50 to 5000, more preferably 80 to 2500, further preferably 80 to 2000, and more preferably 100 to 1500.

Abstract: A shell catalyst for the preparation of vinyl acetate monomer, comprising an oxidic porous catalyst support with an outer shell, containing metallic Pd and Au, wherein the framework structure of the porous catalyst support contains hafnium oxide units. This shell catalyst is suitable for the preparation of VAM and is characterized by a relatively high activity and VAM selectivity and maintains this activity and selectivity over relatively long service lives. Also, processes for the preparation and use of the shell catalyst.

Abstract: A method for producing a shell catalyst which comprises, in the outer shell, one or more of the following metals: Pd, Pt, Ag and Au. Also the use of the shell catalyst produced using the method according to the invention for the production of vinyl acetate monomer, in the hydrogenation of hydrocarbons, in particular the selective hydrogenation of polyunsaturated hydrocarbon compounds, or in the oxidation of alcohols to ketones/aldehydes/carboxylic acids.

Abstract: An open-pore catalyst support comprising a material that comprises a natural sheet silicate and ZrO2. In order to provide a catalyst support, by means of which alkenyl acetate catalysts can be prepared which are characterized by a high level of alkenyl acetate activity over a relatively long period, the catalyst support comprises a material that comprises a natural sheet silicate and ZrO2 in the tetragonal modification.

Abstract: A shell catalyst for the preparation of vinyl acetate monomer, comprising an oxidic porous catalyst support with an outer shell, containing metallic Pd and Au, wherein the framework structure of the porous catalyst support contains hafnium oxide units. This shell catalyst is suitable for the preparation of VAM and is characterized by a relatively high activity and VAM selectivity and maintains this activity and selectivity over relatively long service lives. Also, processes for the preparation and use of the shell catalyst.

Abstract: A shell catalyst for producing vinyl acetate monomer (VAM), comprising an oxidic porous catalyst support, formed as a shaped body, with an outer shell in which metallic Pd and Au are contained. To provide a shell catalyst for producing VAM which has a relatively high activity and can be obtained at relatively low cost, the catalyst support is doped with at least one oxide of an element selected from the group consisting of Li, P, Ca, V, Cr, Mn, Fe, Sr, Nb, Ta, W, La and the rare-earth metals.

Abstract: The present invention relates to a process for the production of a shell catalyst which comprises a catalyst support shaped body with an outer shell in which metallic Pd and/or Au is contained.

Abstract: The present invention relates to a method for producing a shell catalyst which comprises a porous shaped catalyst support body with an outer shell in which at least one catalytically active species is present.

Abstract: A shell catalyst for the production of vinyl acetate monomer (VAM), comprising a porous catalyst support based on a natural sheet silicate, in particular based on an acid-treated calcined bentonite, said catalyst support being loaded with Pd and Au and being designed as a shaped body. In order to provide a shell catalyst for the production of VAM, which shell catalyst is characterized by a relatively high VAM selectivity and also a high activity, it is proposed that the catalyst support has a surface area of less than 130 m2/g.

Abstract: A method for producing a shell catalyst comprising a porous catalyst support shaped body with an outer shell containing at least one transition metal in metal form. To provide a shell catalyst with a relatively small shell thickness, a device is set up to circulate the catalyst support shaped bodies by means of process gases with a reductive effect. The device is charged with catalyst support shaped bodies that are circulated by means of a process gas with a reductive effect, an outer shell of the catalyst support shaped bodies is impregnated with a transition-metal precursor compound by spraying the circulating catalyst support shaped bodies with a solution containing the transition-metal precursor compound, the metal component of the transition-metal precursor compound is converted into the metal form by reduction by means of the process gas, and the catalyst support shaped bodies sprayed with the solution are dried.

Abstract: The present invention relates to a porous catalyst support, consisting of a material comprising a natural sheet silicate, wherein ZrO2 is contained distributed in the material. The present invention also relates to a process for the preparation of the catalyst support according to the invention and to a shell catalyst containing the catalyst support according to the invention and also the use of the catalyst according to the invention in particular for the preparation of vinyl acetate monomer (VAM).

Abstract: An apparatus for preferably automatic handling and/or processing of objects (1), in particular in the field of medical technology, having at least one processing station (3) and one object carrier (2) for bringing the object (1) to the processing station (3), optionally through the processing station (3), and away from the processing station (3), is characterized in that the object carrier (2) has a code; that data concerning the object (1) and/or the handling or processing of the object (1) can be assigned to the code; and that the data can be read or retrieved by way of the code.

Abstract: A method of forming a hand tool by providing a mold having at least two sections injecting a material for forming the hand tool into the mold, and forming a sharpened edge surface on the hand tool along a surface formed by the parting line of the mold. The hand tool may be a dental tool having a working surface for contacting a patient's teeth. The working surface is formed of a substantially a flat curved section extending from a distal end of the dental tool. The distal end of the curved section having a facet extending substantially parallel to a longitudinal axis of the dental tool and having a sharpened surface formed on a proximal edge surface of the facet.

Abstract: A cryostat (1), having a cryostat chamber (2) in which a microtome for cutting frozen specimens is arranged, is described. An illumination device (4) for illuminating the cryostat chamber (2) is provided, the illumination device (4) comprising at least one LED (5).

Abstract: A microtome (1) having a motorized feed drive system (2) for generating a relative movement between an object (7) that is to be cut and a cutting knife (4). A control circuit (8) and a pressure-sensitive sensor (9) are provided for detecting a position between the cutting knife (4) and the object (7). The motorized feed drive system (2) is switched via the control circuit (8) when the sensor (9) responds. The sensor (9) is equipped with a sensor surface (14) that is at least exactly as large as the surface (16) of the object (7). The sensor surface (14) is arranged parallel to the cutting plane (17).

Abstract: An apparatus for treating objects, in particular cytological or histological specimens, having multiple processing stations (3) arranged in a housing (2) and having a transport device (5) for delivering the objects, or the object carriers (4) carrying the objects, into and out of the processing stations (3), is characterized by a region, coordinated with the processing stations (3), for the reception of modular treatment stations (10) having permanently definable functions.

Abstract: An apparatus for preferably automatic handling and/or processing of objects (1), in particular in the field of medical technology, having at least one processing station (3) and one object carrier (2) for bringing the object (1) to the processing station (3), optionally through the processing station (3), and away from the processing station (3), is characterized in that the object carrier (2) has a code; that data concerning the object (1) and/or the handling or processing of the object (1) can be assigned to the code; and that the data can be read or retrieved by way of the code.

Abstract: The invention relates to a microtome (1) for producing thin slices for microscopy, which is provided with a base (2), a blade holder (3) for holding a cutting blade (4) and an object holder (5) for holding the object (6) to be cut. Cutting occurs in a plane by a relative movement between the object (6) and the cutting blade (4) To produce the relative movement, a rotating component (7) is provided with a drive motor (17), wherein the rotating axis of the rotating component (7) is arranged obliquely to the base (2), and a feed slide (9) is provided with a linear guide for setting the slice thickness. The structure of said feed slide (9) is such that it is removable via a feed motor (17) and a control circuit (14) connected thereto.