摘要:
The invention relates to a method for producing hyper-pure, granular silicon by decomposing a gas containing silicon in a reactor consisting of a silicon carbide-based, carbon-fiber reinforced material; to a corresponding reactor; and to the use of said reactor for producing silicon.
摘要:
Process for the endothermic, catalytic gas phase oxidation of hydrocarbons with steam and carbon dioxide to hydrogen and carbon monoxide (synthesis gas), performed in 5 to 30 series-connected reaction zones under adiabatic conditions.
摘要:
Process for preparing ethylene oxide by catalytic gas phase oxidation of ethylene with oxygen, in which the reaction is performed in 5 to 50 reaction zones connected in series under adiabatic conditions, and reactor system for carrying out the process.
摘要:
The invention relates to a process for producing morphologically uniform and virtually monodisperse metal-containing nanoparticles, characterized in that the separation both in time and space of the nucleation and growth processes is achieved by regulation of the temperature and volume flows, with the reaction and particle formation preferably being initiated and carried out in a suitable microstructured modular reactor system. Modularization of the microreaction plant (micro heat exchanger, residence reactor, micromixer, etc.) allows optimal setting of the respective chemical and process-engineering process parameters and thus the preparation of virtually monodisperse and morphologically uniform nanoparticles.
摘要:
The present invention is based on a “one-pot synthesis process” for preparing thiophenes from thiophene monomers with two leaving groups under metal catalysis.
摘要:
The invention relates to a method for the thermal decarboxylation of dicarboxylic acids, in particular to 3,4-ethylene dioxythiophene-2,5-dicarboxylic acid as an educt. According to said method the educt is used in solid form and/or the reaction is carried out in the presence of a plurality of fluidised bed bodies. No solvents are used in the reaction and the decarboxylation product that is formed during the reaction is carried away from the reaction zone in gaseous form.
摘要:
The invention relates to a process for producing morphologically uniform and virtually monodisperse metal-containing nanoparticles, characterized in that the separation both in time and space of the nucleation and growth processes is achieved by regulation of the temperature and volume flows, with the reaction and particle formation preferably being initiated and carried out in a suitable microstructured modular reactor system. Modularization of the microreaction plant (micro heat exchanger, residence reactor, micromixer, etc.) allows optimal setting of the respective chemical and process-engineering process parameters and thus the preparation of virtually monodisperse and morphologically uniform nanoparticles.
摘要:
The invention relates to a device for electrically heating a vertically erect chamber, for example, a reactor, to high temperatures (≧1000° C.) and/or with high power (30 to 1000 kW per zone), comprising several heating zones arranged vertically one above the other. The components of the de- vice, with the exception of the insulating components, are made from graphite materials. The aim of the invention is to embody and develop the device such that the largest possible degree of stability and functional capability for the whole device is achieved with low constructional complexity. The device should in particular be capable of heating very tall chambers. The above is achieved in that each zone (Z) comprises a number of supports (1), arranged in an essentially even distribution around the chamber (R) for heating, which simultaneously serve as electrical supplies for the heater, and in that the heater for each zone (Z) is arranged such as to be fixed at one end thereof and longitudinally displaceable at the other end thereof.
摘要:
The invention relates to a method for the production of high purity silicon, characterized by the following steps: a) reaction of metallic silicon with silicon tetrachloride (SiCl4), hydrogen (H2) and hydrochloric acid (HCl) at a temperature of 500 to 800° C. and a pressure of 25 to 40 bar to give a trichlorosilane-containing (SiHCl3) feed gas stream, b) removal of impurities from the resultant trichlorosilane-containing feed gas stream by scrubbing with condensed chlorosilanes at a pressure of 25 to 40 bar and a temperature of 160 to 200° C. in a multi-stage distillation column, to give a purified trichlorosilane-containing feed gas stream and a solid-containing chlorosilane suspension and a distillative separation of the purified feed gas stream into a partial stream essentially comprising SiCl4 and a partial stream, essentially comprising SiHCl3, c) disproportionation of the SiHCl3-containing partial stream to give SiCl4 and SiH4, whereby the disproportionation is carried out in several reactive/distillative reaction zones, with a counter-current of vapour and liquid, on catalytic solids at a pressure of 500 mbar to 50 bar and SiHCl3 is introduced into a first reaction zone, the lower boiling SiH4-containing disproportionation product produced there undergoes an intermediate condensation in a temperature range of −25° C. to 50° C., the non-condensing SiH4-containing product mixture is fed to one or more further reactive/distillative reaction zones and the lower boiling product thus generated, containing a high proportion of SiH4 is completely or partially condensed in the head condenser and d) thermal decomposition of the SiH4 to give high purity silicon.
摘要:
Process for preparing bis(para-amino-cyclohexyl)methane by multiphase reaction of methylenedianiline with hydrogen, in which the reaction is performed in 5 to 50 series-connected reaction zones under adiabatic conditions.