Patents by Inventor Hans-Juergen Pallasch
Hans-Juergen Pallasch 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: 11274072Abstract: A process for the continuous preparation of 1,2-propylenediamine (1,2-PDA) and dimethyldiethylenetriamine (DMDETA) via reaction of monoisopropanolamine (MIPOA) with ammonia in the presence of hydrogen and a supported heterogeneous hydrogenation catalyst (catalyst), wherein the reaction is effected in the liquid phase at an absolute pressure in the range from 60 to 170 bar.Type: GrantFiled: November 19, 2018Date of Patent: March 15, 2022Assignee: BASF SEInventors: Christian Eidamshaus, Johann-Peter Melder, Joerg Pastre, Hans-Juergen Pallasch
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Publication number: 20200385332Abstract: A process for the continuous preparation of 1,2-propylenediamine (1,2-PDA) and dimethyldiethylenetriamine (DMDETA) via reaction of monoisopropanolamine (MIPOA) with ammonia in the presence of hydrogen and a supported heterogeneous hydrogenation catalyst (catalyst), wherein the reaction is effected in the liquid phase at an absolute pressure in the range from 60 to 170 bar.Type: ApplicationFiled: November 19, 2018Publication date: December 10, 2020Inventors: Christian EIDAMSHAUS, Johann-Peter MELDER, Joerg PASTRE, Hans-Juergen PALLASCH
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Patent number: 10252912Abstract: The invention relates to a method of separating a phosgene- and hydrogen chloride-comprising stream (5), wherein said method comprises conveying the hydrogen chloride- and phosgene-comprising stream (5) into a distillation column (1), withdrawing at the bottom of the distillation column (1) a phosgene-comprising stream (7) and withdrawing at the top of the column an essentially hydrogen chloride-comprising stream (9). At least a portion of the stream (9) withdrawn at the top is compressed and at least partially condensed and at least a portion of the liquid and compressed essentially hydrogen chloride-comprising stream is decompressed and recycled into the top of distillation column (1) as reflux.Type: GrantFiled: March 10, 2016Date of Patent: April 9, 2019Assignee: BASF SEInventors: Heiner Schelling, Torsten Mattke, Hans-Juergen Pallasch, Kai Thiele
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Publication number: 20180044179Abstract: The invention relates to a method of separating a phosgene- and hydrogen chloride-comprising stream (5), wherein said method comprises conveying the hydrogen chloride- and phosgene-comprising stream (5) into a distillation column (1), withdrawing at the bottom of the distillation column (1) a phosgene-comprising stream (7) and withdrawing at the top of the column an essentially hydrogen chloride-comprising stream (9). At least a portion of the stream (9) withdrawn at the top is compressed and at least partially condensed and at least a portion of the liquid and compressed essentially hydrogen chloride-comprising stream is decompressed and recycled into the top of distillation column (1) as reflux.Type: ApplicationFiled: March 10, 2016Publication date: February 15, 2018Applicant: BASF SEInventors: Heiner SCHELLING, Torsten MATTKE, Hans-Juergen PALLASCH, Kai THIELE
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Patent number: 9126904Abstract: The present invention relates to a process for preparing isocyanates by reacting amines with phosgene in the liquid phase, where phosgene, hydrogen chloride and isocyanates are separated with stripping columns operated at different pressures.Type: GrantFiled: October 21, 2013Date of Patent: September 8, 2015Assignee: BASF SEInventors: Torsten Mattke, Markus Hiller, Hans-Juergen Pallasch
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Patent number: 8841480Abstract: The present invention accordingly provides a process for preparing light-colored polyphenylene-polymethylene polyisocyanates comprising the steps (a) providing an amount of chlorine, (b) separating the chlorine provided in the step (a) to obtain a first chlorine fraction having a content of free and bound bromine and iodine of <50 ppm and a second chlorine fraction having an increased content of free and bound bromine and iodine that depends on the original amount of bromine and iodine in the chlorine provided in step (a) and the separation split, (c) reacting carbon monoxide with at least a portion of the first chlorine fraction to form a first phosgene fraction, (d) reacting carbon monoxide with at least a part of the second chlorine fraction to form a second phosgene fraction, (e) reacting at least a portion of a first phosgene fraction with at least one amine of the diphenylmethane diamine series (MDA) to form the corresponding polyphenylene-polymethylene polyisocyanate (PMDI), and (f) reacting at leasType: GrantFiled: July 15, 2010Date of Patent: September 23, 2014Assignee: BASF SEInventors: Heiner Schelling, Hans-Juergen Pallasch, Eckhard Stroefer, Jon S. Speier, Byoung-Yeon Kim
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Patent number: 8759585Abstract: The invention provides a process for preparing diphenylmethanediamine, comprising the steps of: a) reacting aniline with formaldehyde in the presence of an acid, b) neutralizing the predominant part of the acid with ammonia and/or aqueous ammonia solution, c) separating the reaction mixture from step b) into an aqueous phase and an organic phase, d) neutralizing the other part of the acid, present in the organic phase, with aqueous alkali metal hydroxide solution, e) separating the reaction mixture from step d) into an aqueous phase and an organic phase, f) treating the aqueous phase obtained in step c) or optionally the combined aqueous phases from steps c) and e) with at least one oxide or hydroxide of an alkaline earth metal, g) removing the ammonia obtained in step f).Type: GrantFiled: December 13, 2010Date of Patent: June 24, 2014Assignee: BASF SEInventors: Markus Siegert, Torsten Mattke, Tilmann Steinmetz, Hans-Juergen Pallasch, Filip Nevejans
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Publication number: 20140114087Abstract: The present invention relates to a process for preparing isocyanates by reacting amines with phosgene in the liquid phase, where phosgene, hydrogen chloride and isocyanates are separated with stripping columns operated at different pressures.Type: ApplicationFiled: October 21, 2013Publication date: April 24, 2014Applicant: BASF SEInventors: Torsten MATTKE, Markus Hiller, Hans-Juergen Pallasch
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Publication number: 20120232307Abstract: The invention provides a process for preparing diphenylmethanediamine, comprising the steps of: a) reacting aniline with formaldehyde in the presence of an acid, b) neutralizing the predominant part of the acid with ammonia and/or aqueous ammonia solution, c) separating the reaction mixture from step b) into an aqueous phase and an organic phase, d) neutralizing the other part of the acid, present in the organic phase, with aqueous alkali metal hydroxide solution, e) separating the reaction mixture from step d) into an aqueous phase and an organic phase, f) treating the aqueous phase obtained in step c) or optionally the combined aqueous phases from steps c) and e) with at least one oxide or hydroxide of an alkaline earth metal, g) removing the ammonia obtained in step f).Type: ApplicationFiled: December 13, 2010Publication date: September 13, 2012Applicant: BASF SEInventors: Markus Siegert, Torsten Mattke, Tilmann Steinmetz, Hans-Juergen Pallasch, Filip Nevejans
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Publication number: 20120213693Abstract: This invention relates to a process for preparing chlorine from HCl and a method of using liquid HCl to cool and optionally liquefy chlorine in the process. The process involves introducing at least one HCl-containing stream and an oxygen-containing stream into an oxidation zone and catalytically oxidizing the HCl to chlorine, contacting the chlorine with aqueous HCl with partial separation of water and HCl to yield a gas stream, drying the gas stream to yield an essentially water-free gas stream, which is compressed and cooled to give an at least partially liquefied stream, and separating the liquefied stream into a gas stream and a liquid stream which is separated into a chlorine stream, such that cooling and partial liquefaction of the gas stream is effected by indirect heat exchange with a liquid HCl stream, resulting in some of the liquid HCl stream vaporizing to form a gaseous HCl stream.Type: ApplicationFiled: February 13, 2012Publication date: August 23, 2012Applicant: BASF SEInventors: Hans-Jürgen PALLASCH, Heiner SCHELLING, Peter VAN DEN ABEEL, Till EINIG
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Publication number: 20120213692Abstract: The invention relates to a process for separating chlorine from a gas stream I comprising oxygen and chlorine, in which the gas stream I is fed into a lower part of a column K1 and a separately provided liquid, hydrogen chloride stream II is fed into an upper part of the same column and the ascending gaseous stream I is brought into contact with the descending liquid stream II, with chlorine condensing out from the stream I and hydrogen chloride vaporizing from the stream II to give an essentially chlorine-free gas stream III comprising hydrogen chloride and oxygen and a liquid stream IV comprising chlorine.Type: ApplicationFiled: February 1, 2012Publication date: August 23, 2012Applicant: BASE SEInventors: Hans-Jürgen Pallasch, Heiner Schelling, Peter Van den Abeel, Till Einig
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Publication number: 20120130134Abstract: A process for the preparation of polyetherols, comprising the following steps: a) reaction of at least one starter compound with at least one alkylene oxide and a catalyst to give a crude polyetherol and b) removal of low molecular weight byproducts from the crude polyetherol from step a), wherein the crude polyetherol is treated with a stripping gas in a column having internals.Type: ApplicationFiled: July 27, 2010Publication date: May 24, 2012Applicant: BASF SEInventors: Matthias Schopohl, Thomas Ostrowski, Dirk Meckelnburg, Renata Jovanovic, Achim Loeffler, Hans-Juergen Pallasch, Thorsten Friese, Eckard Schauss, Susanne Szeschkus, Vinit Chilekar, Hans Volkmar Schwarz
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Publication number: 20120108843Abstract: The present invention accordingly provides a process for preparing light-coloured polyphenylene-polymethylene polyisocyanates comprising the steps (a) providing an amount of chlorine, (b) separating the chlorine provided in the step (a) to obtain a first chlorine fraction having a content of free and bound bromine and iodine of <50 ppm and a second chlorine fraction having an increased content of free and bound bromine and iodine that depends on the original amount of bromine and iodine in the chlorine provided in step (a) and the separation split, (c) reacting carbon monoxide with at least a portion of the first chlorine fraction to form a first phosgene fraction, (d) reacting carbon monoxide with at least a part of the second chlorine fraction to form a second phosgene fraction, (e) reacting at least a portion of a first phosgene fraction with at least one amine of the diphenylmethane diamine series (MDA) to form the corresponding polyphenylene-polymethylene polyisocyanate (PMDI), and (f) reacting at leaType: ApplicationFiled: July 15, 2010Publication date: May 3, 2012Applicant: BASF SEInventors: Heiner Schelling, Hans-Juergen Pallasch, Eckhard Stroefer, Jon S. Speier, Byoung-Yeon Kim
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Patent number: 8088944Abstract: Isocyanates are prepared by a process in which a product stream from the isocyanate synthesis is purified.Type: GrantFiled: September 20, 2006Date of Patent: January 3, 2012Assignee: BASF SEInventors: Andreas Woelfert, Hans-Juergen Pallasch, Eckhard Stroefer, Heinrich-Josef Blankertz
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Patent number: 7851648Abstract: The invention relates to a process for preparing polyisocyanates by reacting organic amines with phosgene, wherein the reaction is carried out in at least three stages, with the first stage being carried out in a mixing apparatus, the second stage in at least one residence apparatus and the third stage in at least one separation apparatus and the pressure in each successive stage being lower than that in the previous stage.Type: GrantFiled: December 13, 2003Date of Patent: December 14, 2010Assignee: BASF AktiengesellschaftInventors: Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Rene Leuthold, Andreas Brodhagen, Andreas Woelfert, Wolfgang Mackenroth, Markus Maurer
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Patent number: 7709679Abstract: The invention provides a process for the simultaneous preparation of 4,4?-diphenylmethanediamine and also diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanates, which comprises the steps a) preparation of a mixture of diphenylmethanediamine and polyphenylenepolymethylenepolyamines by acid condensation of aniline and formaldehyde and subsequent work-up of the mixture, b) splitting-off of part of the mixture prepared in step a), c) distillation of the mixture separated off in step b) in a column, d) recirculation of the bottom product from step c) to the end product from step a) and condensation of the overhead product from step c), e) distillation of the overhead product from step c) in a column, f) recirculation of the overhead product from step e) to the end product from step a), g) isolation of the 4,4?-diphenylmethanediamine obtained as bottom product in step e), h) reaction of the mixture from step a) with phosgene and subsequent work-up of the reaction product.Type: GrantFiled: January 12, 2007Date of Patent: May 4, 2010Assignee: BASF AktiengesellschaftInventors: Michael Bock, Hans-Juergen Pallasch, Filip Deberdt, Johnny Moors
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Patent number: 7659430Abstract: The invention relates to a process for separating hydrogen chloride and phosgene, which comprises bringing a mixture of hydrogen chloride and phosgene into contact with an ionic liquid in which at least part of the hydrogen chloride is dissolved in a step a) and then separating off the hydrogen chloride dissolved in the ionic liquid in a step b).Type: GrantFiled: September 10, 2005Date of Patent: February 9, 2010Assignee: BASF AktiengesellschaftInventors: Andreas Woelfert, Carsten Knoesche, Hans-Juergen Pallasch, Martin Sesing, Eckhard Stroefer, Hans-Martin Polka, Manfred Heilig
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Publication number: 20090304572Abstract: Process for preparing chlorine from hydrogen chloride, which comprises the steps: a) feeding of a stream a1 comprising hydrogen chloride and of a stream a2 comprising oxygen into an oxidation zone and catalytic oxidation of hydrogen chloride to chlorine, giving a product gas stream a3 comprising chlorine, water, oxygen, carbon dioxide and inert gases; b) contacting of the product gas stream a3 with aqueous hydrochloric acid I in a phase contact apparatus and partial separation of water and of hydrogen chloride from the stream a3, leaving a gas stream b comprising hydrogen chloride, chlorine, water, oxygen, carbon dioxide and possibly inert gases, with at least 5% of the hydrogen chloride comprised in the stream a3 remaining in the gas stream b; c) drying of the gas stream b) to leave a gas stream c which is substantially free of water and comprises hydrogen chloride, chlorine, oxygen, carbon dioxide and possibly inert gases; d) partial liquefaction of the gas stream c by compression and cooling, giving an atType: ApplicationFiled: January 26, 2007Publication date: December 10, 2009Applicant: BASF SEInventors: Martin Sesing, Knud Jacobsen, Klaus-Dieter Reinhardt, Hans-Juergen Pallasch, Peter Van Den Abeel, Heiner Schelling
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Patent number: 7592479Abstract: Isocyanates are prepared by reacting primary amines with phosgene in a reactor by a process in which a reaction discharge is present in the form of a suspension which contains the isocyanate to be prepared, as a liquid, and carbamyl chlorides as a solid, and the suspension is worked up in a film evaporator, and this process is carried out in a production plant.Type: GrantFiled: September 18, 2003Date of Patent: September 22, 2009Assignee: BASF AktiengesellschaftInventors: Eckhard Stroefer, Stephan Scholl, Martin Sohn, Andreas Woelfert, Hans-Juergen Pallasch, Jan Peter Bredehoeft
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Patent number: 7584629Abstract: The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.Type: GrantFiled: December 13, 2003Date of Patent: September 8, 2009Assignee: BASF AktiengesellschaftInventors: Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel, Filip Deberdt, Jan D. Jacobs, Wolfgang Mackenroth