Abstract:
The invention relates to a method for producing chlorosilanes using silicon containing homogeneously distributed copper silicide. The invention especially relates to a method for producing trichlorosilane by reacting said silicon with water, silicon tetrachloride and optionally hydrogen chloride.
Abstract:
A pair of spectacles has lenses (1, 2) that are connected to one another by a bridge element (3). The sides (6) are connected to the lenses (1, 2) by holding elements (5). The holding elements (5) and the bridge element (3) are preferably produced from flexible wire. The bridge element (3) and the holding elements (5) are connected to the two lenses (1, 2) by corresponding angled portions. A holding portion and a pin portion connect with the lenses (1, 2). The pin portion is accommodated in a through-bore of the lenses (1, 2). The holding portion is accommodated in a respective slot of the lens. Variations are possible by providing a simple plug-in connection allowing a selection to be made from a modular system, which enables the purchaser to assemble his/her own individual pair of spectacles.
Abstract:
An inventive device (1) for cordless telephones (4), with which a base station (2) and at least one charging station (3) are associated in order to charge a battery of a cordless telephone (4) via the charging station (3) when the cordless telephone (4) is located in the charging station (3), is characterized by a mechanical connecting device (10, 11, 14, 17) for detachably connecting the charging station (3) and base station (2) to one another. As a result, more flexible possibilities of use for the charging station (3) are obtained.
Abstract:
The present invention relates to fluorinated carboxylic acid esters of phosphono- and phosphinocarboxylic acids containing hydroxyl and/or mercapto groups, their use as waterproofing and/or oil-repellency agents, and a method for their preparation.
Abstract:
The invention relates to a process for the preparation of alkali metal dichromates and chromic acid by the electrolysis of monochromate and/or dichromate solutions in a multi-chamber cell, wherein the anode chamber is shielded from the solution of chromate, dichromate and/or chromic acid by a bipolar ion exchanger membrane.
Abstract:
The invention relates to an electrochemical cell comprising an anode and a cathode compartments separated by a membrane, having corresponding electrodes; said anode and cathode compartments each having an external wall, flanged areas designed like frames in the contact area of the compartments, and a gas diffusion electrode comprising a liquid-permeable carrier coated with a catalyst material; said gas diffusion electrode featuring an area not coated with catalyst at its bottom edge, said area, at the bottom end of the electrochemical cell, protruding between the flanged areas of the external wall of the cathode compartment and the flanged areas of the external wall of the anode compartment in the contact area of the compartments; a porous material arranged parallel between the gas diffusion electrode and the membrane, and devices for the supply and discharge of gas and electrolyte, with a gas space separated from an electrolyte space by appropriate means.
Abstract:
The invention relates to an electrochemical cell comprising an anode and a cathode compartment separated by a membrane, housing corresponding electrodes. The anode and the cathode compartments having external walls with frame-type flanged areas in the contact area of both compartments. The flanged areas having mounting bores marking an inner area and an outer area of the electrochemical cell a, gas-diffusion electrode resting on a support system, a porous material resting on the gas-diffusion electrode, and devices for the inlet and outlet of gas and electrolyte. At least one circumferential gasket frame is in the contact area of both compartments, between the frame-type flanged areas of the external walls of both compartments, said gasket resting on the membrane, with the porous material and the gas-diffusion electrode resting on the frame-type cathodic flanged area and the circumferential gasket frame overlapping in this area with the porous material and the gas-diffusion electrode.
Abstract:
The invention relates to an electrochemical cell comprising an anode and a cathode compartments, separated by a membrane, having corresponding electrodes; said anode and cathode compartments each having an external wall, flanged areas designed like frames in the contact area of the compartments, and a gas diffusion electrode comprising a liquid-permeable carrier coated with a catalyst material; said gas diffusion electrode featuring an area not coated with catalyst at its bottom edge, said area, at the bottom end of the electrochemical cell, protruding between the flanged areas of the external wall of the cathode compartment and the flanged areas of the external wall of the anode compartment in the contact area of the compartments; a porous material arranged parallel between the gas diffusion electrode and the membrane, and devices for the supply and discharge of gas and electrolyte, with a gas space separated from an electrolyte space by appropriate means.
Abstract:
An oscillator with adjustable oscillation frequency includes an active device showing a negative input resistance at a terminal, an oscillator circuit coupled to the terminal of the active device showing the negative input resistance, and an element with adjustable ohmic resistance by which the oscillation frequency of the oscillator is adjustable.