Patents by Inventor Frank Kropfgans
Frank Kropfgans 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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Patent number: 9593021Abstract: The invention provides a method for the processing of finely divided solids during the production of chlorosilanes, which is characterized in that the finely divided solids are hydraulically pressed to give bodies of increased density. Moreover, also provided is the compact obtained by the process according to the invention which is characterized by a filling factor of the finely divided solids to be hydraulically pressed of 3.9 to 4.5.Type: GrantFiled: November 21, 2013Date of Patent: March 14, 2017Assignee: Evonik Degussa GmbHInventors: Janaina Marinas Perez, Ekkehard Mueh, Hartwig Rauleder, Frank Kropfgans
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Publication number: 20150315030Abstract: The invention provides a method for the processing of finely divided solids during the production of chlorosilanes, which is characterized in that the finely divided solids are hydraulically pressed to give bodies of increased density. Moreover, also provided is the compact obtained by the process according to the invention which is characterized by a filling factor of the finely divided solids to be hydraulically pressed of 3.9 to 4.5.Type: ApplicationFiled: November 21, 2013Publication date: November 5, 2015Applicant: Evonik Degussa GmbHInventors: Janaina MARINAS PÉREZ, Ekkeherd MÜH, Hartwig RAULEDER, Frank KROPFGANS
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Publication number: 20110150739Abstract: 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.Type: ApplicationFiled: April 23, 2009Publication date: June 23, 2011Applicant: Evonik Degussa GmbHInventors: Beate Seliger, Norbert Schladerbeck, Ingo Pauli, Andre Mecklenburg, Reinhold Schork, Hartwig Rauleder, Frank Kropfgans, Joachim Diefenbach
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Patent number: 6750361Abstract: An aminofunctional organoalkoxysilane of formula I R2N—(CH2)y—Si(OR1)3−nR2n (I), wherein the R groups bonded to nitrogen are identical or different and each individual R group is hydrogen, an alkyl radical having from 1 to 4 carbon atoms, an aryl radical or an arylalkyl radical, R1 is an alkyl radical having from 1 to 8 carbon atoms or an aryl radical, R2 is an alkyl radical having from 1 to 8 carbon atoms or an aryl radical, y is 2, 3 or 4 and n is 0, 1 or 2, is prepared by a process comprising: reacting a chlorofunctional organoalkoxysilane of formula II Cl—(CH2)y—Si(OR1)3−nR2n (II), wherein R1, R2, y and n are as defined above, with ammonia or an organic amine of formula III HNR2 (III), wherein the two R groups are identical or different and each is defined as described above; separating organic amine hydrochloride or ammonium chloride by-product which is formed in the reaction; distilling the resulting crude product, therebyType: GrantFiled: June 3, 2002Date of Patent: June 15, 2004Assignee: Degussa AGInventors: Frank Kropfgans, Hartwig Rauleder
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Patent number: 6727375Abstract: An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula I (RO)3SiH (I) in which R is an alkyl group having from 1 to 6 carbon atoms, has a main reactor unit (1), at least one metering unit (2, 3, 4) for liquids and/or suspensions, located upstream of the main reactor, and at least one metering unit (5) for gaseous and/or vaporous substances, and also a product workup unit (6) located downstream of the main reactor. A process for preparing substantially halogen-free trialkoxysilanes of the general formula I in which silicon is reacted with alcohols in an inert solvent utilizes at least one organocopper compound catalyst.Type: GrantFiled: March 29, 2002Date of Patent: April 27, 2004Assignee: Degussa AGInventors: Frank Steding, Gerda Grund, Burkhard Standke, Frank Kropfgans, Michael Horn, Albert-Johannes Frings, Jaroslaw Monkiewicz, Hans-Günther Srebny, Claus-Dietrich Seiler, Hans-Joachim Kötzsch
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Publication number: 20030009045Abstract: An aminofunctional organoalkoxysilane of formula IType: ApplicationFiled: June 3, 2002Publication date: January 9, 2003Applicant: Degussa AGInventors: Frank Kropfgans, Hartwig Rauleder
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Publication number: 20020188146Abstract: An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula IType: ApplicationFiled: March 29, 2002Publication date: December 12, 2002Applicant: Degussa AGInventors: Frank Steding, Gerda Grund, Burkhard Standke, Frank Kropfgans, Michael Horn, Albert-Johannes Frings, Jaroslaw Monkiewicz, Hans-Gunther Srebny, Claus-Dietrich Seiler, Hans-Joachim Kotzsch
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Patent number: 6423858Abstract: Aminoalkylsilanes of formula I: R1R2N—(CH2)y—Si(OR3)3−nR4n (I), wherein R1 and R2 are each independently, identical of different, hydrogen, aryl, arylalkyl or C1-4-alkyl; R3 and R4 are each independently, identical or different, C1-8-alkyl or aryl; y is 2, 3 or 4 and n is 0 or 1, 2 or 3, are prepared by a process comprising: reacting an organosilane of formula II: X—(CH2)y—Si(OR3)3−nR4n (II), wherein X is Cl, Br, I or F; and R3, R4, y and n are each as defined above with ammonia or an organic amine compound of the formula: HNR1R2 (III), wherein R1 and R2 are each as defined above with at least one of R1 and R2 not being hydrogen in a liquid phase; evaporating ammonia or organic amine under reduced pressure while ammonium chloride or aminohydrochloride by-products, produced in the reaction of the first step, remains dissolved in the liquid phase; transferring the product mixture after said evaporation to another vessel operateType: GrantFiled: November 26, 2001Date of Patent: July 23, 2002Assignee: Degussa AGInventors: Christoph Schwarz, Frank Kropfgans, Hartwig Rauleder, Hermann-Josef Korte
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Publication number: 20020065428Abstract: Aminoalkylsilanes of formula I:Type: ApplicationFiled: November 26, 2001Publication date: May 30, 2002Applicant: Degussa AGInventors: Christoph Schwarz, Frank Kropfgans, Hartwig Rauleder, Hermann-Josef Korte
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Patent number: 6242628Abstract: Alkoxysilanes are prepared by a process, comprising: (i) reacting a chlorosilane with an alcohol in a water-free and solvent free phase with removal of the liberated hydrogen chloride; (ii) transferring the resultant product mixture into a liquid phase to be distilled and adding a metal alcoholate to the product mixture in the liquid at a temperature in the range from 10-60° C., and thoroughly mixing the neutralized product mixture, said alcoholate being employed in an equimolar amount or in a stoichiometric excess based on the amount of acidic chloride, and (iii) purifying the treated product mixture by distillation under reduced pressure, thereby preparing alkoxysilanes which are low in acidic chloride or essentially free of acidic chloride.Type: GrantFiled: November 8, 1999Date of Patent: June 5, 2001Assignee: Degussa-Huels AktiengesellschaftInventors: Frank Kropfgans, Hartwig Rauleder, Reinhold Schork
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Patent number: 6177584Abstract: The present invention relates to a process for neutralizing and reducing the residual halogen content in alkoxysilanes and alkoxysilane-based compositions, which includes treating an alkoxysilane having a residual content of acidic halide, or a corresponding alkoxysilane-based composition, with metallic magnesium in the presence of an alcohol and separating off the resulting solids.Type: GrantFiled: October 26, 1999Date of Patent: January 23, 2001Assignee: Degussa-Huels AktiengesellschaftInventors: Peter Loewenberg, Frank Kropfgans, Ralf Laven, Roland Edelmann, Albert-Johannes Frings, Michael Horn, Peter Jenkner, Helmut Mack, Jaroslaw Monkiewicz, Burkhard Standke
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Patent number: 6150551Abstract: A process for preparing an alkoxysilane with an acidic chloride content of less than 10 ppm by weight, comprising:reacting a chlorosilane with an alcohol in a water-free and solvent-free phase to form a product mixture containing alkoxysilane and residual acidic chloride, with removal of resultant hydrogen chloride from the product mixture,then adding liquid or gaseous ammonia, in an amount corresponding to a stoichiometric excess, based on the content of acidic chloride, to form an ammonia-containing product mixture,treating the ammonia-containing product mixture at a temperature between 10 and 50.degree. C., wherein the ammonia and acidic chloride undergo neutralization, to form a crude product, and optionally, then separating off a salt formed in the course of neutralization, from the crude product, andrecovering the alkoxysilane by distilling the crude product.Type: GrantFiled: November 3, 1999Date of Patent: November 21, 2000Assignee: Degussa Huels AktiengesellschaftInventors: Frank Kropfgans, Hartwig Rauleder
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Patent number: 5654459Abstract: Alkylhydrogenchlorosilanes of formula I:R.sub.x HSiCl.sub.y (I)wherein R are identical or different alkyl radicals, x is 1 or 2 and y is 1 or 2 and the sum of x and y is equal to 3, are prepared by comproportionating alkylchlorosilanes of formula II:R.sub.a SiCl.sub.n (II)wherein R denotes identical or different alkyl radicals, a is 1 or 2 and n is 2 or 3 and the sum of a and n is equal to 4 with hydrogenchlorosilanes of formula III:R.sub.b H.sub.c SiCl.sub.4-b-c (III)wherein R denotes identical or different alkyl radicals, b is 0, 1, 2 or 3 and c is 1, 2, 3 or 4 and the sum of b and c is equal to or smaller than 4, in the presence of a catalyst saturated with a hydrogen halide.Type: GrantFiled: June 7, 1996Date of Patent: August 5, 1997Assignee: Huels AktiengesellschaftInventors: Frank Kropfgans, Albert Frings, Michael Horn, Peter Jenkner, Hans-Joachim Koetzsch, Jaroslaw Monkiewicz, Claus-Dietrich Seiler, Hans-Guenther Srebny, Burkhard Standke
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Patent number: 5646325Abstract: 3-Acryloyloxypropylalkoxysilanes of formula I:CH.sub.2 .dbd.C(R)C(O)O(CH.sub.2).sub.3 Si(R.sup.1).sub.a (OR.sup.2).sub.3-a (I)are prepared by reacting a hydridosilane of formula II:HSi(R.sup.1).sub.a (OR.sup.2).sub.3-a (II)with an allyl ester of formula III:CH.sub.2 .dbd.C(R)C(O)OCH.sub.2 CH.dbd.CH.sub.2 (III),where R is a hydrogen atom or a methyl group, R.sup.1 and R.sup.2 are each C.sub.1 to C.sub.6 alkyl groups or phenyl groups, and a is 0, 1 or 2, in the presence of a platinum catalyst.Type: GrantFiled: September 25, 1995Date of Patent: July 8, 1997Assignee: Huels AktiengesellschaftInventors: Jaroslaw Monkiewicz, Albert Frings, Michael Horn, Peter Jenkner, Hans-Joachim Koetzsch, Frank Kropfgans, Claus-Dietrich Seiler, Hans-Guenther Srebny, Burkhard Standke
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Patent number: 5629400Abstract: The invention relates to water-based organopolysiloxane containing compositions which are essentially free from organic solvents, have a flash point above 70.degree. C. and essentially liberate no alcohols by hydrolysis on dilution with water. The organopolysiloxane-containing compositions according to the invention are obtainable by mixing M mol of water-insoluble organotrialkoxysilanes with Q mol of water-soluble aminoalkylalkoxysilanes in a molar ratio of 0<M/Q.ltoreq.2, adding water to the mixture, adjusting the pH of the reaction mixture to a value of between 1 and 8 and removing alcohol already present and/or formed during the reaction. The process for the preparation of the organopolysiloxane-containing compositions according to the invention and their use are also disclosed.Type: GrantFiled: December 6, 1995Date of Patent: May 13, 1997Assignee: Huels AktiengesellschaftInventors: Burkhard Standke, Albert Frings, Michael Horn, Hans-Joachim Kotzsch, Frank Kropfgans, Jaroslaw Monkiewicz, Claus-Dietrich Seiler, Jim Steinmetz
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Patent number: 5616762Abstract: 3-Halo- and pseudohalo-alkylsilane esters are prepared by reacting an allyl X compound or a compound containing an allyl X structure with a hydridosilane ester in the presence of an iridium catalyst prepared under specific conditions and/or the reaction medium containing a 0.01-100 mol % excess of the allyl X compound or compound containing the allyl X unit relative to the amount of hydridosilane ester reactant.Type: GrantFiled: October 25, 1995Date of Patent: April 1, 1997Assignee: Huels AktiengesellschaftInventors: Frank Kropfgans, Albert Frings, Michael Horn, Hans-Joachim Koetzsch, Jaroslaw Monkiewicz, Claus-Dietrich Seiler, Hans-Guenther Srebny, Burkhard Standke
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Patent number: 5536860Abstract: Aminopropylalkoxysilanes of formula (I):R.sup.2 R.sup.3 NCH.sub.2 CHR.sup.4 CH.sub.2 Si(OR).sub.3-n (R.sup.1).sub.n(I)are prepared by reacting hydrogensilanes of formula (II):HSi(OR).sub.3n (R.sup.1).sub.n (II)with an amine of formula (III):R.sup.2 R.sup.3 NCH.sub.2 CR.sup.4 .dbd.CH.sub.2 (III),where R and R.sup.1 are alkyl radicals having from 1 to 8 carbon atoms and n is equal to 0, 1 or 2 andR.sup.2 and R.sup.3 are hydrogen, alkyl radicals having from 1 to 8 carbon atoms, .omega.-alkenyl radicals having from 3 to 8 carbon atoms or combinations thereof, andR.sup.4 is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, in the presence of a shaped polymeric rhodium complex catalyst containing organosiloxanemonophenylphosphine ligands.Type: GrantFiled: October 4, 1995Date of Patent: July 16, 1996Assignee: Huels AktiengesellschaftInventors: Jaroslaw Monkiewicz, Albert Frings, Michael Horn, Hans-Joachim Koetzsch, Frank Kropfgans, Claus-Dietrich Seiler, Hans-Guenther Srebny, Burkhard Standke
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Patent number: 5527937Abstract: Hydrogenalkoxysilanes are prepared by direct reaction of finely divided metallic silicon with alcohols in the presence of copper-containing catalysts in a heat-transfer oil comprising tritoluenes, tetratoluenes or mixtures thereof at from 100.degree. to 350.degree. C.Type: GrantFiled: October 4, 1995Date of Patent: June 18, 1996Assignee: Huels AktiengesellschaftInventors: Burkhard Standke, Albert Frings, Michael Horn, Hans-Joachim Koetzsch, Frank Kropfgans, Jaroslaw Monkiewicz, Claus-Dietrich Seiler, Hans-Guenther Srebny