Abstract: A digital spirit level has an at least substantially cuboid or prismatic housing, wherein at least one surface of the housing is designed as a supporting surface for placing the digital spirit level on a workpiece which is to be oriented with respect to the earth's gravitational field. A digital display unit, which is controlled by an electronic control device and is designed to display to a user the orientation of the housing with respect to the earth's gravitational field in an intuitively perceivable manner, is arranged at least in the region of a further surface of the housing.

Abstract: The invention relates to a process for the production of an alkenylaromatic compound comprising the step of: contacting a hydrocarbon stream including an alkylaromatic compound with water vapor in the presence of a dehydrogenation catalyst, suitable for the dehydrogenation of the alkylaromatic compound, in one or more consecutive reactors, wherein the weight ratio between the water vapor and the hydrocarbon (water/hydrocarbon ratio) is from 0.4 to 1.5, wherein the dehydrogenation catalyst comprises three or more of teeth and a body, such that the cross-section of the dehydrogenation catalyst is a toothed-wheel shape, and wherein the dehydrogenation catalyst comprises, based on the total weight of the dehydrogenation catalyst components as oxides, from 30 to 90 weight percent (wt. %) of iron calculated as Fe2O3, from 1 to 50 wt. % of potassium calculated as K2O, from 1 to 50 wt. % of cerium calculated as CeO2, and from 0.01 to 1 wt. % of yttrium calculated as Y2O3.

Abstract: A resistor assembly including at least two connector elements and at least one strip-like or plate-like resistor element arranged between the connector elements. The resistor element has an upper side, a lower side and two longitudinal sides parallel to each other. The at least one resistor element is of a material of which the electrical conductivity is lower than the electrical conductivity of the material of the connector elements. The resistor element has, on at least its upper side or at least its lower side, at least one shaped element as a positioning aid.

Abstract: A resistor arrangement for measuring current strength having connection elements and a resistor element between the connection elements. The connection elements and the resistor element are arranged in a plane and in a row such that the arrangement is strip-shaped and has its smallest spatial extent perpendicular to the current direction. The resistor element has two contact sides and the connection elements each have a contact face connected to the contact sides. When current flows through the arrangement, current flow lines are formed which are deflected at at least one of the contact sides by an angle of at least 5° at the transition from the connection element to the resistor element.

Abstract: The invention relates to a trimming device (21), in particular for a coating device (10) for coating narrow surfaces (12) of planar workpieces (11), having a cutting tool (22) by means of which a cutting movement (S) can be performed in order to trim a narrow-surface coating material (13), wherein the cutting tool (22) comprises a cutting region to which the narrow-surface coating material (13) can be transported in a direction of movement (B), wherein an adjusting device (23) is provided by means of which an adjusting movement (W) of the cutting tool (22) can be controlled in order to trim the narrow-surface coating material (13), wherein the adjusting movement (W) has at least one directional component directed in the direction of movement (B) of the narrow-surface coating material (13), as well as to a coating device (10) for coating narrow surfaces (12) of planar workpieces (11) with a narrow-surface coating material (13), and to a method for trimming a narrow-surface coating material (13) with a trimming

Abstract: A resistor assembly including at least two connector elements and at least one strip-like or plate-like resistor element arranged between the connector elements. The resistor element has an upper side, a lower side and two longitudinal sides parallel to each other. The at least one resistor element is of a material of which the electrical conductivity is lower than the electrical conductivity of the material of the connector elements. The resistor element has, on at least its upper side or at least its lower side, at least one shaped element as a positioning aid.

Abstract: The present invention provides an applicator for thermally activating a functional layer of a coating material, comprising: a base body designed to guide the coating material in a running direction, wherein the base body is able to guide electromagnetic waves in the direction of the guided coating material, wherein a dielectric is arranged inside the base body and the dielectric is formed of granular material. The present invention also provides a device for thermally activating a coating material, a use of a dielectric, and a method for thermally activating a functional layer of a coating material.

Abstract: A catalytic converter arrangement for producing phthalic anhydride by means of a gas phase oxidation of aromatic hydrocarbons, comprising a reactor with a gas inlet side for a reactant gas, a gas outlet side for a product gas, a first catalytic converter layer made of catalytic converter elements, and at least one second catalytic converter layer made of catalytic converter elements. The first catalytic converter layer is arranged on the gas inlet side, and the second catalytic converter layer is arranged downstream of the first catalytic converter layer in the gas flow direction. The catalytic converter elements have an outer layer of an active compound. The invention is characterized in that the active compound content in the first catalytic converter layer and/or in the second catalytic converter layer is below 7 wt.

Abstract: The invention relates to a catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons, which comprises a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas and also a first catalyst zone made up of catalyst bodies and at least one second catalyst zone made up of catalyst bodies, where the first catalyst zone is arranged at the gas inlet end and the second catalyst zone is arranged downstream of the first catalyst zone in the gas flow direction and the length of the first catalyst zone in the gas flow direction is less than the length of the second catalyst zone in the gas flow direction, characterized in that the first catalyst zone has a higher gap content compared to the second catalyst zone.

Abstract: The invention relates to a catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons, which comprises a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas and also a first catalyst zone made up of catalyst bodies and at least one second catalyst zone made up of catalyst bodies, where the first catalyst zone is arranged at the gas inlet end and the second catalyst zone is arranged downstream of the first catalyst zone in the gas flow direction and the length of the first catalyst zone in the gas flow direction is less than the length of the second catalyst zone in the gas flow direction, characterized in that the first catalyst zone has a higher gap content compared to the second catalyst zone.

Abstract: A catalytic converter arrangement for producing phthalic anhydride by means of a gas phase oxidation of aromatic hydrocarbons, comprising a reactor with a gas inlet side for a reactant gas, a gas outlet side for a product gas, a first catalytic converter layer made of catalytic converter elements, and at least one second catalytic converter layer made of catalytic converter elements. The first catalytic converter layer is arranged on the gas inlet side, and the second catalytic converter layer is arranged downstream of the first catalytic converter layer in the gas flow direction. The catalytic converter elements have an outer layer of an active compound. The invention is characterized in that the active compound content in the first catalytic converter layer and/or in the second catalytic converter layer is below 7 wt.

Abstract: A method of operating a horizontal filter well. Water is transported into a well from at least one roughly horizontally arranged train and distributed further from there. Pressurized water is forced through the horizontal filter train in the reverse flow direction, as a means to free the horizontal filter train of blockages. The pressurized water exits through the inlet orifices of the horizontal filter train and passes into the aquifer. A vertical well provided in the vicinity of the horizontal filter train suctions off the water exiting from the horizontal filter train, along with impurities removed from the horizontal filter train.