Patents by Inventor Johannes-Peter Schafer
Johannes-Peter Schafer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20090032389Abstract: The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.Type: ApplicationFiled: September 9, 2008Publication date: February 5, 2009Applicant: LANXESS DEUTSCHLAND GMBHInventors: Ludwig Deibele, Dieter Heinz, Jan Thomas Leu, Johannes-Peter Schafer, Kai Fahrenkamp, Wolfgang Scheinert, Thomas Schilling, Paul Wagner
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Patent number: 7435319Abstract: The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.Type: GrantFiled: May 12, 2003Date of Patent: October 14, 2008Assignee: LANXESS Deutschland GmbHInventors: Ludwig Deibele, Dieter Heinz, Jan Thomas Leu, Johannes-Peter Schäfer, Kai Fahrenkamp, Wolfgang Scheinert, Thomas Schilling, Paul Wagner
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Patent number: 7323155Abstract: The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper-pure water in one or several steps; b) transferred in the water-moist state to the reactor in which the disproportionation is to proceed; c) treated in the reactor with boiling methanol or rinsed with anhydrous methanol; and d) the methanol is removed from the catalyst by evacuation and/or stripping with inert gas. The invention further relates to a method for treating disproportionation catalysts.Type: GrantFiled: November 9, 2001Date of Patent: January 29, 2008Assignee: Solarworld AktiengesellschaftInventors: Stephan Klein, Hans-Dieter Block, Hans-Joachim Leimkühler, Werner Dick, Dirk Müller, Johannes-Peter Schäfer
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Patent number: 6942844Abstract: Silane is produced in a continuous process by disproportionating trichlorsilane in at least 2 recreation areas for reaction/distillation, which are run through by a countercurrent of steam and liquid in the presence of catalytically active solid under a pressure which ranges between 500 mbar and 50 bar.Type: GrantFiled: March 26, 2001Date of Patent: September 13, 2005Assignee: Solarworld AktiengesellschaftInventors: Dirk Müller, Georg Ronge, Johannes-Peter Schäfer, Hans-Joachim Leimkühler, Ulrike Strauss, Hans-Dieter Block
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Patent number: 6905576Abstract: This invention relates to a continuous process for the preparation of silane by catalytic disproportionation of trichlorosilane in a reactive/distillative reaction zone having a catalyst bed of catalytically active solid.Type: GrantFiled: December 14, 1999Date of Patent: June 14, 2005Assignee: SolarWorld AGInventors: Hans-Dieter Block, Hans-Joachim Leimkühler, Dirk Müller, Johannes-Peter Schäfer, Georg Ronge
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Patent number: 6887448Abstract: 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.Type: GrantFiled: November 21, 2001Date of Patent: May 3, 2005Assignee: SolarWorld AGInventors: Hans-Dieter Block, Leslaw Mleczko, Hans-Joachim Leimkühler, Rainer Weber, Knud Werner, Dietmar Schwanke, Johannes-Peter Schäfer, Gebhard Wagner
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Patent number: 6843972Abstract: The invention relates to a method for removing anhydrous acids and hydrohalogens from trichlorosilane by contacting the trichlorosilane with solid bases. The invention further relates to the use of the trichlorosilane so purified in the production of silane and/or super-pure silicon.Type: GrantFiled: November 6, 2001Date of Patent: January 18, 2005Assignee: Solarworld AktiengesellschaftInventors: Stephan Klein, Hans-Dieter Block, Hans-Joachim Leimkühler, Werner Dick, Johannes-Peter Schäfer
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Publication number: 20040091412Abstract: Silane is produced in a continuous process by disproportionating trichlorsilane in at least 2 recreation areas for reaction/distillation, which are run through by a countercurrent of steam and liquid in the presence of catalytically active solid under a pressure which ranges between 500 mbar and 50 bar.Type: ApplicationFiled: April 16, 2003Publication date: May 13, 2004Inventors: Dirk Muller, Georg Ronge, Johannes-Peter Schafer, Hans-Joachim Leimkuhler, Ulrike Strauss, Hans-Dieter Block
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Publication number: 20040047797Abstract: 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.Type: ApplicationFiled: October 2, 2003Publication date: March 11, 2004Inventors: Hans-Dieter Block, Leslaw Mleczko, Hans-Joachim Leimkuhler, Rainer Weber, Knud Werner, Dietmar Schwanke, Johannes-Peter Schafer, Gebhard Wagner
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Publication number: 20040042949Abstract: The invention relates to a method and a device for separating aluminium from chlorosilanes, in particular for separating aluminium trichloride from silicon tetrachloride or trichlorosilane or from mixtures of silicon tetrachloride or trichlorosilane. According to the invention, aluminium chloride is removed from the chlorosilanes silicon tetrachloride and trichlorosilane in a continuous process, without the addition of admixtures, to obtain a residual content of aluminium that is as low as required, by separating the aluminium trichloride and the chlorosilane by distillation, at a temperature approximately greater than 160° C.Type: ApplicationFiled: May 12, 2003Publication date: March 4, 2004Inventors: Hans-Dieter Block, Rainer Weber, Gunter Olf, Hans-Joachim Leimkuhler, Johannes-Peter Schafer
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Publication number: 20040030171Abstract: The invention relates to a method of producing silane or hydrochlorosilanes by disproportionation of a higher chlorinated hydrochlorosilane or a mixture of said hydrochlorosilanes in the presence of a catalyst. Before the catalyst is used, it is a) washed with hyper-pure water in one or several steps; b) transferred in the water-moist state to the reactor in which the disproportionation is to proceed; c) treated in the reactor with boiling methanol or rinsed with anhydrous methanol; and d) the methanol is removed from the catalyst by evacuation and/or stripping with inert gas. The invention further relates to a method for treating disproportionation catalysts.Type: ApplicationFiled: May 20, 2003Publication date: February 12, 2004Inventors: Stephan Klein, Hans-Dieter Block, Hans-Joachim Leimkuhler, Werner Dick, Dirk Muller, Johannes-Peter Schafer
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Publication number: 20040028594Abstract: The invention relates to a method for removing anhydrous acids and hydrohalogens from trichlorosilane by contacting the trichlorosilane with solid bases. The invention further relates to the use of the trichlorosilane so purified in the production of silane and/or super-pure silicon.Type: ApplicationFiled: May 14, 2003Publication date: February 12, 2004Inventors: Stephan Klein, Hans-Dieter Block, Hans-Joachim Leimkuhler, Werner Dick, Johannes-Peter Schafer
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Publication number: 20040020757Abstract: The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed continuously into a container, and, in a second step, the fraction removed into the container being recycled to the column and being separated again batchwise into different fractions.Type: ApplicationFiled: May 12, 2003Publication date: February 5, 2004Inventors: Ludwig Deibele, Dieter Heinz, Jan Thomas Leu, Johannes-Peter Schafer, Kai Fahrenkamp, Wolfgang Scheinert, Thomas Schilling, Paul Wagner
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Patent number: 6675844Abstract: Method of dispensing moist, sticky or statically charged bulk material into a fluid pervious container having an opening for receiving said bulk material, which comprises conveying a bulk material, as a suspension or dispersion in a fluid, from a reservoir, and introducing said suspension or dispersion into the fluid-pervious container through said opening in the container to pass the fluid component of the suspension or dispersion through and out of the fluid-pervious container while the retaining the bulk material within the container, and recirculating the fluid to the reservoir.Type: GrantFiled: April 30, 2002Date of Patent: January 13, 2004Assignee: Bayer AktiengesellschaftInventors: Lutz Gottschalk, Georg Ronge, Johannes-Peter Schäfer, Dirk Müller, Michael Prein, Werner Verhoeven, Domien Sluyts
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Publication number: 20030017934Abstract: Method of dispensing moist, sticky or statically charged bulk material into a fluid pervious container having an opening for receiving said bulk material, which comprises conveying a bulk material, as a suspension or dispersion in a fluid, from a reservoir, and introducing said suspension or dispersion into the fluid-pervious container through said opening in the container to pass the fluid component of the suspension or dispersion through and out of the fluid-pervious container while the retaining the bulk material within the container, and recirculating the fluid to the reservoir.Type: ApplicationFiled: April 30, 2002Publication date: January 23, 2003Inventors: Lutz Gottschalk, Georg Ronge, Johannes-Peter Schafer, Dirk Muller, Michael Prein, Werner Verhoeven, Domien Sluyts
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Patent number: 4732685Abstract: With the extraction method, a material exchange column with an ordered packing 2a or 2b on the basis of a plurality of layers 3 stacked parallel to the column axis and making point contact with one another is used. The packing 2a, 2b is perfused by a continuous and a dispersed phase in a counter current. The packing has a very large specific surface area of at least 300 m.sup.2 /m.sup.3 of packing volume. At the periphery of the packing 2a, 2b, the two phase streams are re-circulated into the packing at regular intervals through a rim seal composed of an elastic material not wettable by the dispersed phase. The rim seal is placed round the packing in the form of an elastic tube or pipe and seals the intermediate space between the internal column wall and the packing. A further improvement in the separating capacity can be achieved if pulsating operation is adopted.Type: GrantFiled: October 2, 1986Date of Patent: March 22, 1988Assignee: Bayer AktiengesellschaftInventors: Hans-Walter Brandt, Friedhelm Steffens, Johannes-Peter Schafer, Jurgen Schroter