摘要:
Shaped bodies having catalytic properties which can be obtained by a process comprising the steps: a) production of a shaped body by means of a powder-based rapid prototyping process, b) if appropriate, a heat treatment of the shaped body, c) if appropriate, application of at least one catalytically active component to the shaped body, d) if appropriate, a further heat treatment, where steps b), c) and/or d) can be carried out a number of times, are used as reactor internals in heterogeneously catalyzed chemical reactions.
摘要:
The invention relates to moulded bodies having catalytic properties, obtained due to a method that comprises the following said steps: a) a moulded body is produced by means of a powder-based rapid-prototyping-method, b) said moulded body is optionally heat-treated, c) at least one catalytically active component is optionally applied to the moulded body, d) said moulded body is optionally subjected to another heat-treatment. The steps b, c) and/or d) can be performed several times. Said moulded bodies are used as reactor fittings in heterogeneously catalyzed chemical reactions.
摘要:
The subject of the present invention is an apparatus for the intermixing of a fluid stream with a fluid stream, which comprises a pipe through which the fluid stream is routed, at least two distributors for delivering the fluid stream being arranged inside the pipe, this arrangement of the distributors being made possible by bores in the casing of the pipe, and these distributors having a free flow cross section which is constant or decreases continuously, as seen in the main direction of flow of the fluid, and the distributors having one or more rows of holes for delivering the fluid into the fluid.
摘要:
The subject of the present invention is an apparatus for the intermixing of a fluid stream with a fluid stream, which comprises a pipe through which the fluid stream is routed, at least two distributors for delivering the fluid stream being arranged inside the pipe, this arrangement of the distributors being made possible by bores in the casing of the pipe, and these distributors having a free flow cross section which is constant or decreases continuously, as seen in the main direction of flow of the fluid, and the distributors having one or more rows of holes for delivering the fluid into the fluid.
摘要:
The present invention relates to a process for producing nanoparticles comprising at least one polymer and/or copolymer by providing an aerosol comprising droplets of at least one monomer and at least one photoinitiator in a gas stream, irradiating this aerosol stream with light such that the monomers present polymerize, and removing the nanoparticles formed from the gas stream, to nanoparticles producible by this process and to the use of these inventive nanoparticles in optical, electronic, chemical or biotechnological systems, or for active ingredient administration.
摘要:
A reactor (1) in the form of an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream (2) by means of an oxygen-comprising gas stream (3) to give a reaction gas mixture over a heterogeneous catalyst configured as monolith (4), wherein the interior of the reactor (1) is divided by a detachable, cylindrical or prismatic housing G which is arranged in the longitudinal direction of the reactor (1) and is gastight in the circumferential direction and open at two end faces of the housing into an inner region A having one or more catalytically active zones (5), in which in each case a packing composed of monoliths (4) stacked on top of one another, next to one another and above one another and before each catalytically active zone (5) in each case a mixing zone (6) having solid internals are provided, and an outer region B arranged coaxially to the inner region A, is proposed.
摘要:
A process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a reaction gas mixture input stream comprising the hydrocarbon to be dehydrogenated is conducted through a fixed catalyst bed disposed in a shaft and the reaction gas mixture input stream is obtained in the shaft by metering an input gas II comprising molecular oxygen upstream of the fixed catalyst bed into an input gas stream I which comprises molecular hydrogen and the hydrocarbon to be dehydrogenated and is flowing within the shaft toward the fixed catalyst bed.
摘要:
Distributor device (1) for a gas phase/liquid phase mixture for an apparatus (2) into whose interior a gas phase and a liquid phase are introduced via at least one feed opening (4), wherein the distributor device (1) comprises a horizontal plate (5) and vertical elements (6) which conduct the liquid phase and are arranged thereon and are open in the upstream direction and project outward in the direction of the feed opening (4) through the gas cushion formed, with at least one opening (10) for the gas phase being provided on the circumference of the elements (6) which conduct the liquid phase in the region of the gas cushion formed and at least one opening (11) for the liquid phase.
摘要:
Method of producing a nanoparticle suspension with the steps (i) preparation of an emulsion of a disperse polar phase, where the aqueous phase comprises one or more precursor substances forming the nanoparticles, in a continuous organic phase in the presence of an emulsifier stabilizing the emulsion, (ii) conversion of the one or more precursor substances to nanoparticles in the disperse aqueous phase, (iii) breaking of the emulsion and phase separation, where the nanoparticle suspension is obtained as one phase, (iv) separation off of the nanoparticle suspension, (v) optionally isolation of the nanoparticles from the nanoparticle suspension, wherein the emulsifier is selected from compounds of the general formula (I) in which X is O, NH, Y is C(O), NH, R is a saturated or a mono- or polyunsaturated, linear or branched hydrocarbon radical having 6 to 30 carbon atoms and R1 is hydrogen or C1-C4-alkyl, and R2 is a saturated or a mono- or polyunsaturated, linear or branched hydrocarbon radical having 1 to 30 carbon atoms, preferably 6 to 30 carbon atoms, R3 is C1-C4-alkyl, n is 0 or 1, and the breaking of the emulsion is effected by splitting the emulsifier.
摘要:
A reactor in the form of an essentially horizontal cylinder for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream by means of an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst configured as monolith is disclosed herein. The interior of the reactor is divided by a detachable, cylindrical or prismatic housing which is arranged in the longitudinal direction of the reactor, gastight in the circumferential direction and open at two end faces of the housing into an inner region, having one or more catalytically active zones. In each case, a packing composed of monoliths may be stacked on top of one another, next to one another, and above one another and before each catalytically active zone. Also in each case, a mixing zone having solid internals and an outer region arranged coaxially to the inner region are provided.