Abstract: A method for planning local solidification of a layer of powder material with a high-energy beam while manufacturing a three-dimensional object layer by layer includes determining a inskin area and a downskin area, defining an inskin pattern for the inskin area and downskin pattern for the the downskin area independently, by defining geometric progression of inskin vectors in the inskin area and defining geometric progression of downskin vectors in the downskin area, and defining a processing sequence of the inskin vectors and the downskin vectors, by defining inskin vector blocks and downskin vector blocks. Each inskin vector block includes inskin vectors to be processed successively. Each downskin vector block includes downskin vectors to be processed successively. The method further includes defining a vector-block sequence for processing the inskin vector blocks and the downskin vector blocks alternately.

Abstract: A mobile floor cleaning machine is provided having an integrated floor cleaning tool. In order to provide a floor cleaning machine of this kind with improved handling capability, the floor cleaning machine can include an accessory retainer for cleaning accessories, which has at least one accommodating part, which is fastened to the floor cleaning machine, and at least one retaining part, which can be connected to the accommodating part, for retaining the cleaning accessories.

Abstract: A floor cleaning machine is proposed which comprises a handle unit for operating the floor cleaning machine and a dead man's switching device with an actuation unit, wherein the actuation unit is retained on the handle unit by means of a first region, the actuation unit has a second region which is swivelable relative to the first region, and the second region is retained on the first region as a single piece by means of a hinge device, a swivel position of the second region relative to the first region determining whether the dead man's switch is switching or non-switching.

Abstract: A mobile floor cleaning machine is provided having an integrated floor cleaning tool. In order to provide a floor cleaning machine of this kind with improved handling capability, the floor cleaning machine can include an accessory retainer for cleaning accessories, which has at least one accommodating part, which is fastened to the floor cleaning machine, and at least one retaining part, which can be connected to the accommodating part, for retaining the cleaning accessories.

Abstract: The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the hydrogen-containing waste hydrogenation gas generated in the reaction is compressed and then recycled into the hydrogenation reactor. A jet pump is used for the compression of the waste hydrogenation gas and a liquid or gaseous feedstock of the hydrogenation process is used as the motive agent. Preferred motive agents are the hydrogenation gas or a working solution recycled into the process. The process is particularly suitable for performing the hydrogenation step in the anthraquinone process for the production of hydrogen peroxide.

Abstract: The anthraquinone process for producing hydrogen peroxide, including a hydrogenation step, an oxidation step and an extraction step. The oxidation waste gas leaving the oxidation reactor at an excess pressure is passed as a propellant jet to one or more gas jets and whereby a vacuum is produced for auxiliary processes, such as drying of the working solution, distillation of the aqueous hydrogen peroxide solution and drawing off of ventilator gases from solvent storage tanks.

Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.

Abstract: The invention is directed to a continuous hydrogenation process in which a hydrogenable compound is dissolved in a working solution with hydrogen and a heterogeneous catalyst. At least part of the hydrogen-containing waste hydrogenation gas generated in the reaction is compressed and then recycled into the hydrogenation reactor. A jet pump is used for the compression of the waste hydrogenation gas and a liquid or gaseous feedstock of the hydrogenation process is used as the motive agent. Preferred motive agents are the hydrogenation gas or a working solution recycled into the process. The process is particularly suitable for performing the hydrogenation step in the anthraquinone process for the production of hydrogen peroxide.

Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.

Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.

Abstract: The anthraquinone process for producing hydrogen peroxide, including a hydrogenation step, an oxidation step and an extraction step. The oxidation waste gas leaving the oxidation reactor at an excess pressure is passed as a propellant jet to one or more gas jets and whereby a vacuum is produced for auxiliary processes, such as drying of the working solution, distillation of the aqueous hydrogen peroxide solution and drawing off of ventilator gases from solvent storage tanks.

Abstract: A continuous process for oxidation, in which the substance to be oxidized and the oxidizing gas flow countercurrently and the oxidizing gas is mixed with a split stream containing preoxidized substance before it enters the reactor. A Venturi nozzle is particularly suitable as the mixing organ in the reactor.

Abstract: A continuous process for oxidation, in which the substance to be oxidized and the oxidizing gas flow countercurrently and the oxidizing gas is mixed with a split stream containing preoxidized substance before it enters the reactor. A Venturi nozzle is particularly suitable as the mixing organ in the reactor.

Abstract: A continuous catalytic hydrogenation process, in which a reaction mixture containing the substance to be hydrogenated, the hydrogenation product, hydrogen and the hydrogenation catalyst suspended in the reaction mixture is recirculated in a reactor. Part of the hydrogenation product is removed from the reactor and the substance to be hydrogenated and hydrogen are fed into the reaction. In this process the substance to be hydrogenated and the hydrogen are mixed before entering the reactor. A venturi nozzle is particularly suitable as the mixing device.

Abstract: A lighting device has a sealed interior, which communicates with the environment via an upper vent opening and another lower vent opening. The upper vent opening is covered with a mat-like insert, which is air-permeable and water-repellant. The upper vent opening is formed in a wall that points downward. To protect the upper vent opening against splashing water, a shielding device is provided. Communicating with the lower vent opening is a line that discharges on the underside of the vehicle. When the vehicle is in motion, a pressure difference is developed between the upper vent opening and the lower vent opening, so that there is a flow through the interior from top to bottom. The insert prevents dirt and water from the road from entering the interior.