Patents by Inventor Carsten Knoesche
Carsten Knoesche 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: 20120251435Abstract: A process is proposed for preparing isocyanates by phosgenating the corresponding amines in the gas phase, which comprises dividing a phosgene-containing reaction mixture from the gas phase synthesis of carbon monoxide and chlorine to phosgene, which is run with a stoichiometric carbon monoxide excess over chlorine, by means of a thermal separating process and/or of a membrane separating process into two streams, specifically into a first, low-carbon monoxide stream comprising not more than 1% by weight of carbon monoxide, based on the total weight of the first, low-carbon monoxide stream, and into a second, carbon monoxide-rich stream comprising more than 10% by weight of carbon monoxide, based on the total weight of the second, carbon monoxide-rich stream, and using the first, low-carbon monoxide stream as a reactant stream in the phosgenation of amines to isocyanates in the gas phase.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: BASF SEInventors: Vanessa Simone LEHR, Torsten Mattke, Carsten Knösche, Heiner Schelling, Gerhard Olbert
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Patent number: 8258337Abstract: The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use. In the process, an amine and phosgene, both in the gas phase, react in the presence of an inert medium. A number, n, of amine streams are reacted with a number, n +1, of phosgene streams in a reactor. The number n is a positive integer of at least 1. All amine and phosgene streams are introduced into the reactor through annular gaps for mixing.Type: GrantFiled: August 23, 2006Date of Patent: September 4, 2012Assignee: BASF AktiengesellschaftInventors: Andreas Woelfert, Carsten Knoesche, Andreas Daiss, Tsung-Chieh Cheng, Torsten Mattke, Eckhard Stroefer
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Publication number: 20120142959Abstract: A process for preparing diisocyanates by gas-phase phosgenation starting out from a feed stream comprising the corresponding diamines and a phosgene-comprising feed stream, in which the feed streams are separately converted into the gas phase and preheated to the reaction temperature of the gas-phase phosgenation, wherein the waste heat from a plant for preparing chlorine by heterogeneously catalyzed oxidation of hydrogen chloride by the Deacon process is utilized for this purpose, is proposed.Type: ApplicationFiled: August 10, 2010Publication date: June 7, 2012Applicant: BASF SEInventors: Torsten Mattke, Gerhard Olbert, Carsten Knoesche, Heiner Schelling
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Patent number: 8168818Abstract: The invention relates to a process for preparing isocyanates in the gas phase.Type: GrantFiled: November 6, 2007Date of Patent: May 1, 2012Assignee: BASF AktiengesellschaftInventors: Andreas Daiss, Andreas Woelfert, Carsten Knoesche, Eckhard Stroefer
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Publication number: 20120016154Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of an inert medium, in which the amine and the phosgene are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride and leaves the reactor is cooled in a quench space of a quench by adding a quench medium. The quench medium on addition to the quench space has a temperature above the condensation temperature or the desublimation temperature of the reaction gas.Type: ApplicationFiled: October 8, 2009Publication date: January 19, 2012Applicant: BASF SEInventors: Torsten Mattke, Carsten Knoesche
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Publication number: 20120004446Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which phosgene and amine are first evaporated and then superheated further to reaction temperature, and the superheated phosgene and amine are mixed and fed to a reactor in which the phosgene and the amine are converted to the isocyanate, wherein the residence time of the phosgene at temperatures greater than 300° C. is not more than 5 s, and/or the temperature of heat transfer surfaces in contact with phosgene is not more than 20 K above the phosgene temperature to be established. The invention further relates to an apparatus for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase.Type: ApplicationFiled: March 18, 2010Publication date: January 5, 2012Applicant: BASF SEInventors: Torsten Mattke, Carsten Knoesche, Bernd Rumpf, Eckhard Stroefer
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Publication number: 20120004445Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, in which phosgene and amine are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride leaving the reactor is cooled in a quench by adding a liquid quench medium to form a mixture of reaction gas and quench medium as the product stream. The walls of the quench are essentially completely wetted with a liquid.Type: ApplicationFiled: April 7, 2010Publication date: January 5, 2012Applicant: BASF SEInventors: Vanessa Simone Lehr, Carsten Knoesche, Torsten Mattke
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Publication number: 20110301380Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which the amine is evaporated in an evaporator to give an amine-comprising gas stream, the phosgene is mixed into the amine-comprising gas stream, and the amine and the phosgene are converted to the isocyanate in a reactor, wherein the temperature of surfaces in contact with the gaseous amine is kept above the dew point limit of the amine-comprising gas stream.Type: ApplicationFiled: March 4, 2010Publication date: December 8, 2011Applicant: BASF SEInventors: Carsten Knoesche, Torsten Mattke
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Publication number: 20110257428Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, optionally in the presence of an inert medium, in which the amine and the phosgene are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas (1) which comprises isocyanate and hydrogen chloride leaving the reactor is cooled in a quench (3) by adding a liquid quench medium (5) to form a mixture of reaction gas and quench medium as the product stream (7). The quench medium (5) used is a mixture which comprises at least one solvent and isocyanate and which is withdrawn from the preparation process, any solid particles present in the quench medium (5) being removed before addition to the quench (3).Type: ApplicationFiled: November 30, 2009Publication date: October 20, 2011Applicant: BASF SEInventors: Carsten Knoesche, Torsten Mattke, Patric Mueller
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Publication number: 20110213177Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, in the presence or absence of an inert medium, which comprises the following steps: (a) vaporization of the amine in a vaporizer, (b) superheating of the amine, (c) mixing of the gaseous amine with the phosgene and introduction into a reaction zone, (d) reaction of amine and phosgene to give isocyanate in the reaction zone, with a reaction mixture comprising isocyanate and hydrogen chloride being formed, (e) cooling of the reaction mixture comprising isocyanate and hydrogen chloride, wherein the vaporizer comprises a vessel in which tubes through which a heating medium flows are comprised, where number and diameter of the tubes are designed so that the tubes have a specific heat transfer area based on the volume through which the amine flows of at least 300 m2/m3.Type: ApplicationFiled: February 25, 2011Publication date: September 1, 2011Applicant: BASF SEInventors: Torsten Mattke, Ralf Böhling, Carsten Knösche, Vanessa Simone Lehr
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Publication number: 20110213178Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of an inert medium, in which the amine and the phosgene are first mixed and converted to the isocyanate in a reactor, by cooling a reaction gas which comprises isocyanate and hydrogen chloride and leaves the reactor in a quench by adding a liquid quench medium to obtain a mixture of reaction gas and quench medium. The amount of quench medium added is such that the temperature of the mixture of reaction gas and quench medium which is established in the quench is above the dew point of the gas present in the quench.Type: ApplicationFiled: November 4, 2009Publication date: September 1, 2011Applicant: BASF SEInventors: Torsten Mattke, Carsten Knösche
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Patent number: 7994361Abstract: The invention relates to a process for preparing aromatic diisocyanates by reaction of phosgene with diamines in the gas phase, in which the reaction is carried out in a reaction zone at moderate pressures, i.e. the pressure in this reaction zone is more than 3 bar and less than 20 bar.Type: GrantFiled: July 24, 2003Date of Patent: August 9, 2011Assignee: BASF AktiengesellschaftInventors: Andreas Woelfert, Christian Mueller, Eckhard Stroefer, Markus Weber, Joachim Pfeffinger, Carsten Knoesche
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Publication number: 20110105785Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the gas phase, if appropriate in the presence of at least one inert medium, the phosgene being passed into a reactor (21) through a first inlet and the amine through a second inlet of an ejector (1). The first inlet and the second inlet open into a mixing zone (17) in which the phosgene and the amine are mixed to give a reaction mixture. The mixing zone (17) is followed downstream by a diffuser (19) in which pressure and temperature of the reaction mixture composed of phosgene and amine are increased.Type: ApplicationFiled: July 23, 2009Publication date: May 5, 2011Applicant: BASF SEInventors: Carsten Knoesche, Torsten Mattke
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Patent number: 7915444Abstract: The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.Type: GrantFiled: July 31, 2006Date of Patent: March 29, 2011Assignee: BASF AktiengesellschaftInventors: Andreas Woelfert, Carsten Knoesche, Manfred Heilig, Eckhard Stroefer
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Publication number: 20100305356Abstract: The present invention relates to a process for preparing isocyanates.Type: ApplicationFiled: August 13, 2008Publication date: December 2, 2010Applicant: BASF SEInventors: Gerhard Olbert, Torsten Mattke, Carsten Knoesche, Andreas Daiss, Jens Denecke
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Publication number: 20100217035Abstract: The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.Type: ApplicationFiled: September 11, 2008Publication date: August 26, 2010Applicant: BASF SEInventors: Carsten Knoesche, Andreas Woelfert, Torsten Mattke, Eckhard Stroefer, Heinrich-Josef Blankertz, Bernhard Geissler
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Publication number: 20100210870Abstract: The present invention relates to a process for preparing isocyanates.Type: ApplicationFiled: August 13, 2008Publication date: August 19, 2010Applicant: BASF SEInventors: Gerhard Olbert, Torsten Mattke, Carsten Knoesche, Andreas Daiss, Jens Denecke
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Publication number: 20100189623Abstract: The invention relates to a process for recovering acids from product streams of organic syntheses, which comprises the steps a) neutralization of the acid with a base, b) removal of the base by means of adsorption, c) recovery of the acid.Type: ApplicationFiled: June 9, 2008Publication date: July 29, 2010Applicant: BASF SEInventors: Veronika Wloka, Torsten Mattke, Carsten Knoesche, Daniel Breuninger, Nils Bottke
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Publication number: 20100076218Abstract: The invention relates to a process for preparing isocyanates in the gas phase.Type: ApplicationFiled: November 6, 2007Publication date: March 25, 2010Applicant: BASF SEInventors: Andreas Daiss, Andreas Woelfert, Carsten Knoesche, Eckhard Stroefer
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Publication number: 20100056822Abstract: The invention relates to a process for preparing isocyanates in the gas phase.Type: ApplicationFiled: November 6, 2007Publication date: March 4, 2010Applicant: BASF SEInventors: Andreas Daiss, Andreas Woelfert, Carsten Knoesche, Eckhard Stroefer