Patent application number | Description | Published |
20080197014 | Reactor, Plant And Industrial Process For The Continuous Preparation Of High-Purity Silicon Tetrachloride or High- Purity Germanium Tetrachloride - A reactor, a plant, and a continuous, industrial process carried out therein for preparing high-purity silicon tetrachloride or high-purity germanium tetrachloride by treating the silicon tetrachloride or germanium tetrachloride to be purified, which is contaminated by at least one hydrogen-containing compound, by a cold plasma and isolating purified high-purity silicon tetrachloride or germanium tetrachloride from the resulting treated phase by fractional distillation. The treatment is carried out in a plasma reactor in which longitudinal axes of a dielectric, of a high-voltage electrode, and of a grounded, metallic heat exchanger are oriented parallel to one another and at the same time parallel to the force vector of gravity. | 08-21-2008 |
20080283972 | Silicon Compounds for Producing Sio2-Containing Insulating Layers on Chips - The present invention relates to a process for producing an SiO | 11-20-2008 |
20080289690 | Process For Producing a Silicon Film on a Substrate Surface By Vapor Deposition - The present invention relates to a process for producing a silicon film on a substrate surface by vapor deposition, starting from a silicon-based precursor, characterized in that the precursor used is silicon tetrachloride. The present invention also relates to thin-film solar cells or crystalline silicon thin-film solar cells obtainable by the process according to the invention. The invention also relates to the use of silicon tetrachloride for producing a film deposited on a substrate from the vapor phase. | 11-27-2008 |
20090020413 | Process and apparatus for purifying silicon tetrachloride or germanium tetrachloride containing hydrogen compounds - The invention relates to a process for the purification's of silicon tetrachloride or germanium tetrachloride contaminated with at least one hydrogen-containing compound, in which the silicon tetrachloride or germanium tetrachloride to be purified is treated in a targeted manner by means of a cold plasma and purified silicon tetrachloride or germanium tetrachloride is isolated from the phase which has been treated in this way. The present invention further relates to an apparatus for carrying out the process of the invention, which comprises a stock and vaporization unit for silicon or germanium tetrachloride ( | 01-22-2009 |
20100080746 | METHOD FOR PRODUCING HIGHER SILANES - The invention relates to a method for producing dimeric and/or trimeric silicon compounds, in particular silicon halogen compounds. The claimed method is also suitable for producing corresponding germanium compounds. The invention also relates to a device for carrying out said method to the use of the produced silicon compounds. | 04-01-2010 |
20100266489 | REMOVAL OF FOREIGN METALS FROM INORGANIC SILANES - The invention relates to a method for the treatment of a composition containing inorganic silanes and at least one foreign metal and/or a compound containing a foreign metal, wherein the composition is brought in contact with at least one adsorption agent, and for obtaining the composition, in which the content of foreign metal and/or of a compound containing a foreign metal is reduced, and to a corresponding composition having a reduced foreign metal content, and further to the use of organic resins, activated carbons, silicates, and/or zeolites for the reduction of foreign metals and/or compounds containing foreign metals in compositions of inorganic silanes. | 10-21-2010 |
20100270296 | LARGE CONTAINER FOR HANDLING AND TRANSPORTING HIGH-PURITY AND ULTRA HIGH PURITY CHEMICALS - The invention relates to an empty container ( | 10-28-2010 |
20100274028 | REMOVAL OF POLAR ORGANIC COMPOUNDS AND EXTRANEOUS METALS FROM ORGANOSILANES - The invention relates to a process for treating a composition comprising organosilanes and at least one polar organic compound and/or at least one extraneous metal and/or a compound containing extraneous metal, wherein the composition is contacted with at least one adsorbent and a composition in which the content of the organic polar compound and/or of the extraneous metal and/or of the compound containing extraneous metal is reduced is subsequently obtained, and also to a corresponding composition in which the content of polar organic compounds and/or extraneous metals has been reduced to traces, and to the use of organic resins, activated carbons, silicates and/or zeolites for reducing the amounts of the compounds mentioned. | 10-28-2010 |
20100278706 | METHOD FOR REDUCING THE CONTENT IN ELEMENTS, SUCH AS BORON, IN HALOSILANES AND INSTALLATION FOR CARRYING OUT SAID METHOD - The invention relates to a method for reducing the content in elements of the third main group of the periodic system, especially in boron- and/or aluminum-containing compounds of technically pure halosilanes for producing purified halosilanes, especially high-purity chlorosilanes. The invention further relates to an installation for carrying out said method. | 11-04-2010 |
20100296994 | CATALYST AND METHOD FOR DISMUTATION OF HALOSILANES CONTAINING HYDROGEN - The invention relates to a catalyst, the use thereof, and a method for dismutation of halosilanes containing hydrogen, in particular chlorosilanes containing hydrogen. | 11-25-2010 |
20100320072 | PROCESSING OF CHLOROSILANE FLOWS CONTAINING BORON - The invention relates to a method for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron by means of separation by distillation of a boron-enriched distillation flow. The invention further relate to a device for yielding boron-depleted chlorosilanes from a chlorosilane mixture containing boron. | 12-23-2010 |
20110052474 | INSTALLATION AND METHOD FOR REDUCING THE CONTENT IN ELEMENTS, SUCH AS BORON, OF HALOSILANES - The invention relates to a method for reducing the content in elements of the third main group of the periodic system, especially in boron- and aluminum-containing compounds of technically pure halosilanes for producing high-purity halosilanes, especially high-purity chlorosilanes. The invention further relates to an installation for carrying out said method. | 03-03-2011 |
20110150739 | METHOD FOR REMOVING BORON-CONTAINING IMPURITIES FROM HALOGEN SILANES AND APPARATUS FOR PERFORMING SAID METHOD - The invention relates to a method for reducing the content of boron-containing compounds in compositions I comprising at least one silicon halide, especially of chlorosilanes of the type HnSiCI4-n with n being equal to 0, 1, 2 or 3, by introducing a small amount of moisture into the composition I in a first step and separating the hydrolyzed boron- and/or silicon-containing compounds in a second step in such a way that a pre-purified composition II having a reduced boron content is obtained, wherein, in particular, the first and second steps can be run in at least one or more cycles. Also claimed is an apparatus for performing the method and an overall system into which this apparatus is integrated. | 06-23-2011 |
20110150741 | PRODUCTION OF SILICON BY REACTING SILICON OXIDE AND SILICON CARBIDE, OPTIONALLY IN THE PRESENCE OF A SECOND CARBON SOURCE - The invention relates to a method for producing silicon by reacting silicon oxide at an elevated temperature, silicon carbide and, optionally, a second carbon source being added to the reaction mixture. The invention further relates to a composition that can be used in the disclosed method. The essential part of the invention is the use of silicon carbide as a reaction initiator and/or reaction accelerator during the production of silicon or, alternatively, in nearly equimolar amounts for the production of silicon. | 06-23-2011 |
20110163462 | Universal Infrastructure for Chemical Processes - The invention relates to a plant for carrying out chemical processes comprising at least means for directly carrying out the conversion in the form of means for developing products and/or in the form of at least one reactor for the continuous industrial manufacture of products, devices for receiving and/or providing starting materials and/or products and devices for controlling the conversion, which are combined to a single integrated and transportable functional unit serving as infrastructure, preferably in the form of a standardised transport container. | 07-07-2011 |
20110175024 | METHOD FOR PRODUCING HIGH-PURITY SILICON CARBIDE FROM HYDROCARBONS AND SILICON OXIDE THROUGH CALCINATION - The invention relates to a method for producing silicon carbide through reaction of silicon oxide and a carbon source comprising a hydrocarbon at high temperature, in particular to a technical method for producing silicon carbide or for producing compositions containing silicon carbide. The invention further relates to a high-purity silicon carbide, to compositions containing the same, to the use thereof as a catalyst and for the production of electrodes and other items. | 07-21-2011 |
20110182796 | METHOD FOR THE PYROLYSIS OF CARBOHYDRATES - The present invention relates to methods for the technical pyrolysis of a carbohydrate or carbohydrate mixture at an elevated temperature while adding silicon oxide, to a pyrolysis product obtainable in this way, and to the use thereof as a reducing agent for the production of solar silicon from silicic acid and carbon at a high temperature. | 07-28-2011 |
20110184205 | REMOVAL OF EXTRANEOUS METALS FROM SILICON COMPOUNDS BY ADSORPTION AND/OR FILTRATION - The invention relates to a process for treating a composition containing silicon compounds, especially organosilanes and/or inorganic silanes, and at least one extraneous metal and/or a compound containing extraneous metal, wherein the composition is contacted with at least one adsorbent and/or a first filter and then a composition in which the content of the extraneous metal and/or of the compound containing extraneous metal has been reduced is obtained. The invention further relates to the use of organic resins, activated carbon, silicates and/or zeolites and/or else of at least one filter with small pore sizes to reduce the level of the compounds mentioned. | 07-28-2011 |
20110214425 | ENERGY-EFFICIENT SYSTEM FOR GENERATING CARBON BLACK, PREFERABLY IN ENERGETIC COOPERATION WITH SYSTEMS FOR GENERATING SILICON DIOXIDE AND/OR SILICON - The object of the invention is a more energy-efficient system for utilizing waste heat and residual gases from the engineered generation of carbon compounds, such as carbon black, graphite or from sugar pyrolysis, using a coupling of energy-heat or a thermal heat-generating plant for generating electrical energy, in particular for operating melt furnaces, and/or for utilizing the waste heat in endothermal processes. The invention also relates to the use of waste heat. | 09-08-2011 |
20110236288 | METHOD FOR PRODUCING HIGH-PURITY SIO2 FROM SILICATE SOLUTIONS - The invention relates to a novel method for producing high-purity SiO | 09-29-2011 |
20110236291 | SYSTEM FOR PRODUCING SILICON WITH IMPROVED RESOURCE UTILIZATION - The present invention relates to a system for producing silicon, preferably high-purity silicon, particularly solar silicon, and to a method for producing silicon, preferably high-purity silicon, in particular solar silicon, in each case with particularly effective resource utilization and reduced emission of pollutants. | 09-29-2011 |
20110244238 | METHOD FOR PRODUCING HIGH-PURITY SIO2 FROM SILICATE SOLUTIONS - The invention relates to a novel method for producing high-purity SiO | 10-06-2011 |
20110262336 | PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE - The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a silicon oxide, purified by acidic precipitation from an aqueous solution of a silicon oxide dissolved in an aqueous phase, using one or more pure carbon sources, the purified silicon oxide being obtained, in particular, by the precipitation of a silicon oxide dissolved in an aqueous phase in an acidifier. The invention also relates to a formulation containing an activator and to a device for producing silicon, a reactor and electrodes. | 10-27-2011 |
20110262339 | PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE - The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a purified silicon oxide using one or more pure carbon sources, the purified silicon oxide, which was purified as silicon oxide dissolved in an aqueous phase, having a content of other polyvalent metals or metal oxides, in relation to the silicon oxide, of less than or equal to 300 ppm, preferably less than 100 ppm, especially preferably less than 50 ppm and according to the invention less than 10 ppm of the other metals and being obtained advantageously by gel formation in alkaline conditions. The invention also relates to a formulation containing an activator and to the use of purified silicon oxide together with an activator for producing silicon. | 10-27-2011 |
20120177557 | PROCESS FOR TREATING CATALYST PRECURSORS - The invention relates to a process for treating a substantially water-containing amino-functional, polymeric catalyst precursor while retaining the inner porous structure thereof and the outer spherical form thereof to form a catalyst, in which the catalyst precursor is treated at mild temperatures and under reduced pressure to prepare a catalyst having a water content below 2.5% by weight. The process is preferably integrated into an industrial scale process for preparing dichlorosilane, monosilane, silane, or solar silicon or semiconductor silicon from silanes. | 07-12-2012 |
20120183464 | PROCESS AND USE OF AMINO-FUNCTIONAL RESINS FOR DISMUTATING HALOSILANES AND FOR REMOVING EXTRANEOUS METALS - The invention relates to a process for dismutating at least one halosilane and reducing the content of extraneous metal and/or a compound containing extraneous metal in the at least one halosilane and in the at least one silane obtained, by contacting at least one halosilane of the general formula I, H | 07-19-2012 |
20120195804 | REACTOR AND PLANT FOR THE CONTINUOUS PREPARATION OF HIGH-PURITY SILICON TETRACHLORIDE OR HIGH-PURITY GERMANIUM TETRACHLORIDE - A reactor and a plant containing the reactor for conducting a continuous, industrial process for preparing high-purity silicon tetrachloride or high-purity germanium tetrachloride is provided. The plant contains a plasma reactor having a dielectric, a high voltage electrode and an earthed, metallic heat exchanger, in which the longitudinal axes of the dielectric, of the high-voltage electrode and of the earthed, metallic heat exchanger are oriented parallel to one another and at the same time parallel to the force vector of gravity. | 08-02-2012 |
20120214005 | METHOD FOR PRODUCING HYDRIDOSILANES - The invention relates to a method for producing hydridosilanes from halosilanes by a) reacting i) at least one halosilane of the generic formula Si | 08-23-2012 |
20120230905 | PROCESS FOR PYROLYSIS OF CARBOHYDRATES - The present invention relates to processes for industrial pyrolysis of a carbohydrate or carbohydrate mixture with addition of amorphous carbon, to a pyrolysis product thus obtainable and to the use thereof, especially as a reducing agent in the production of silicon from silica and carbon at high temperature. | 09-13-2012 |
20130015175 | METHOD FOR PRODUCING SILICONAANM Karl; AlfonsAACI GrundauAACO DEAAGP Karl; Alfons Grundau DEAANM Lang; Jurgen ErwinAACI KarlsruheAACO DEAAGP Lang; Jurgen Erwin Karlsruhe DEAANM Rauleder; HartwigAACI RheinfeldenAACO DEAAGP Rauleder; Hartwig Rheinfelden DEAANM Frings; BodoAACI Schloss HolteAACO DEAAGP Frings; Bodo Schloss Holte DE - The present invention relates to an improved process for producing silicon, preferably solar silicon, using novel high-purity graphite mouldings, especially graphite electrodes, and to an industrial process for production of the novel graphite mouldings. | 01-17-2013 |
20130043893 | USE OF SPECIFIC RESISTIVITY MEASUREMENT FOR INDIRECT DETERMINATION OF THE PURITY OF SILANES AND GERMANES AND A CORRESPONDING PROCESS - The invention relates to a method for indirectly determining the purity of silanes and germanes using a device for measuring specific resistance. The invention further relates to a system for industrially producing and/or filling containers with silanes or germanes, including a quality control in which a device is used for measuring specific resistance. | 02-21-2013 |
20130294995 | SELECTIVE SPLITTING OF HIGH ORDER SILANES - The invention relates to a process for preparing monomeric and/or dimeric halogen- and/or hydrogen-containing silicon compounds from oligomeric inorganic silanes having three or more directly covalently interconnected silicon atoms substituted by substituents selected from halogen, hydrogen and/or oxygen by reacting the oligomeric silane over a nitrogen-containing catalyst in the presence of hydrogen halide. | 11-07-2013 |
20130323151 | MONOCHLOROSILANE, PROCESS AND APPARATUS FOR THE PREPARATION THEREOF - The invention relates to a process for preparing monochlorosilane by reaction of monosilane and dichlorosilane in the presence of a catalyst. In the process of the invention, monochlorosilane is formed by comproportionation of monosilane and dichlorosilane. The invention further relates to the use of the monochlorosilane produced and also a plant for carrying out the process. | 12-05-2013 |
20140017155 | PROCESS FOR PREPARING TRICHLOROSILANE - The present invention relates to a process for preparing trichlorosilane and optionally, if required, HCDS and OCTS, by a) in a first step, allowing silicon tetrachloride and silicon to react at a temperature of >800 to 1450° C., b) in a step two, cooling the product stream (PS) thus obtained from step one to obtain a product stream (PG2), c) optionally, in a step three, removing STC and HCDS from the product stream (PG2) to obtain, as a residue or bottom product, a product mixture (PG3), d) optionally, in a step four, removing OCTS from the product stream PG3 from step three, to obtain, as a residue or bottom product, a product mixture (PG4), e) in a step five, reacting the product stream (PG2) originating from step two or the product mixture (PG3) originating from step three or the product mixture (PG4) originating from step four, or a mixture of product streams PG2 and PG3 or a mixture of product streams PG2 and PG4 with hydrogen chloride to obtain a product stream (PHS), and f) in a subsequent step six, removing trichlorosilane from a product stream (PHS) thus obtained, and discharging the remaining STC-containing bottoms or recycling them as a reactant component into step one of the process. | 01-16-2014 |
20140041548 | PROCESS FOR PRODUCING SIO2 MOULDINGS - The present invention relates to a process for producing SiO | 02-13-2014 |
20140042359 | PROCESS FOR PREPARING AQUEOUS COLLOIDAL SILICA SOLS OF HIGH PURITY FROM ALKALI METAL SILICATE SOLUTIONS - The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof. | 02-13-2014 |
20140072497 | PROCESS FOR PREPARING TRISILYLAMINE IN THE GAS PHASE - The invention relates to a method for producing trisilylamine from ammoniac and monochlorosilane in the gas phase. The invention further relates to a plant in which such a method can be performed. | 03-13-2014 |
20140072803 | HIGH-PURITY SILICON DIOXIDE GRANULES FOR QUARTZ GLASS APPLICATIONS AND METHOD FOR PRODUCING SAID GRANULES - It has been found that conventional cheap waterglass qualities in a strongly acidic medium react to give high-purity silica grades, the treatment of which with a base leads to products which can be processed further to give glass bodies with low silanol group contents. | 03-13-2014 |
20140079620 | METHOD FOR THE SEPARATION OF METAL IONS THAT ARE DIVALENT OR HIGHER FROM STRONG ACIDS OR HIGHLY ACIDIC MEDIA - The present invention relates to a method of purifying strong acids or strongly acidic media to remove di- and higher valent metal ions, which can be used within the context of the production of high-purity silica. The invention further relates to the use of special ion exchangers for carrying out the method according to the invention and the resultant high-purity silicas. | 03-20-2014 |
20140124706 | PROCESS FOR PREPARING CHLOROSILANES BY MEANS OF HIGH-BOILING CHLOROSILANES OR CHLOROSILANE-CONTAINING MIXTURES - The invention relates to a process for preparing chlorosilanes of the general formula H | 05-08-2014 |
20140161705 | PROCESS FOR THE PREPARATION OF TRISILYLAMINE FROM MONOCHLOROSILANE AND AMMONIA - The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant in which such a process can be carried out with advantage. | 06-12-2014 |
20140193321 | METHOD FOR PRODUCING HIGHER SILANES - The invention relates to a method for producing dimeric and/or trimeric silicon compounds, in particular silicon halogen compounds. The claimed method is also suitable for producing corresponding germanium compounds. The invention also relates to a device for carrying out said method to the use of the produced silicon compounds. | 07-10-2014 |
20140199227 | PRODUCTION OF TRISILYLAMINE FROM MONOCHLOROSILANE AND AMMONIA BY USE OF INERT SOLVENT - The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant wherein such a process can be carried out with advantage. | 07-17-2014 |
20140341794 | PROCESS FOR THE COUPLED PREPARATION OF POLYSILAZANES AND TRISILYLAMINE - The invention relates to a process for preparing trisilylamine and polysilazanes in the liquid phase, in which ammonia dissolved in an inert solvent is initially introduced in a substoichiometric amount relative to monochlorosilane which is likewise present in an inert solvent. The reaction is carried out in a reactor in which trisilylamine formed according to the following equation | 11-20-2014 |
20150023859 | PRODUCTION OF TRISILYLAMINE FROM MONOCHLOROSILANE AND AMMONIA BY USE OF INERT SOLVENT - The present invention relates to a specific process for producing trisilylamine from monochlorosilane and ammonia in the liquid phase. The invention further relates to a plant wherein such a process can be carried out with advantage. | 01-22-2015 |