摘要:
In a process for preparing an aqueous and/or alcoholic solution of hydrogen peroxide by reaction of hydrogen and oxygen in a trickle-bed reactor over a supported catalyst including a noble metal, the apparent flow direction of the gas stream and the apparent flow direction of the liquid stream are not parallel to one another. The apparent flow direction of the gas stream preferably runs radially from the longitudinal axis to the circumference of the reactor. The process allows high gas throughputs with a small pressure drop.
摘要:
Catalysts produced by electroless deposition of at least one platinum metal on a nonporous nonmetallic support can be used for the synthesis of hydrogen peroxide from the elements and for the hydrogenation of organic compounds.
摘要:
The present invention relates to a process for the preparation of phosphonomethylglycine, wherein N-phosphonomethyliminodiacetic acid N-oxide is brought into contact with a catalytically effective amount of thiocyanic acid or a salt thereof.
摘要:
The present invention relates to a process for the preparation of phosphonomethylglycine in which N-phosphonomethyliminodiacetic acid N-oxide is brought into contact with a catalytically active quantity of at least one catalyst, selected from amongst a thionyl halide, ammonium dithionite or an alkali metal dithionite, a dialkyl sulfite, sulfur dichloride, sulfur dioxide and sulfurous acid, in a reaction chamber by metering the N-phosphonomethyliminodiacetic acid N-oxide into the reaction chamber in such a way that always at least 50% of the N-oxide metered into the reaction chamber are converted.
摘要:
A heating arrangement, particularly for preventing freezing of pipes for delivering crankcase gas from the crankcase of an internal combustion engine to the air intake, in which a valve (12, 18) is provided which includes at least one metal plate, and a PTC thermistor (20) or a resistance heater is disposed on the metal plate.
摘要:
The present invention relates to a process for the preparation of hydrogen peroxide from oxygen or oxygen-delivering substances and hydrogen or hydrogen-delivering substances in the presence of at least one catalyst containing a metal-organic framework material, wherein said framework material comprises pores and a metal ion and an at least bidentate organic compound, said bidentate organic compound being coordinately bound to the metal ion. The invention further relates to a novel material consisting of said metal organic framework material wherein the material is brought in contact with at least one additional metal.
摘要:
A hydraulic part of a magnet valve is received in a bore of a valve block. The hydraulic part is secured to the valve block with a calked heel of a securing bush that is slipped onto a guide sleeve of the hydraulic part. The securing bush rests on an annular shoulder of the guide sleeve and engages a jacket wall of the guide sleeve with a press fit, and one edge of the securing bush is adapted to a rounded-out throat between the jacket wall and an end wall of the annular shoulder by means of plastic deformation. A valve sleeve engages a portion of the bore of the valve block with a press fit. The calked heel, the plastically deformed edge of the securing bush, and the press fit of the valve bush seals that seal off against fluid are achieved without using additional rubber-elastic sealing means.
摘要:
The invention relates to a brake system for a vehicle having at least one brake circuit which includes at least one wheel brake, one inlet valve, one outlet valve, and one return device. The return device has at least one first pump device and one second pump device, having respective inlet valves and outlet valves. The pump devices have a delivery cycle offset from each other. An additional valve is located in every supply line of every pump device for preventing negative pressure produced in an intake phase of one of the pump devices from being applied to an inlet valve of another pump device.
摘要:
The invention relates to a light comprising a carrier (3) which has at least one lighting means (4) and which is arranged behind a light pane (12). The aim of the invention is to form a light or a carrier which can be produced in a simple and economical manner and which can be mounted in a small space. The lighting means (4) are arranged on the carrier (3) in such a manner that they essentially correspond to the contour of the light pane (2) and the lighting means (4) is placed in a horizontal manner on one side of the carrier (3) so that the carrier (3) and the lighting means (4) require very little space. The carrier (3) and the light are used in motor vehicles.
摘要:
The invention relates to a light comprising a carrier (3) which has at least one lighting means (4) and which is arranged behind a light pane (12). The aim of the invention is to form a light or a carrier which can be produced in a simple and economical manner and which can be mounted in a small space. The lighting means (4) are arranged on the carrier (3) in such a manner that they essentially correspond to the contour of the light pane (2) and the lighting means (4) is placed in a horizontal manner on one side of the carrier (3) so that the carrier (3) and the lighting means (4) require very little space. The carrier (3) and the light are used in motor vehicles.