Patents by Inventor Claus Hechler

Claus Hechler 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).

  • Patent number: 10730823
    Abstract: A process for isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation, wherein the process is carried out in a dividing wall column having separation-active internals and a vaporizer and in which a dividing wall is arranged in the longitudinal direction of the column to form an upper joint column region, a lower joint column region, an inflow section having a side feed point, and an offtake section having a side offtake point, where the column has from 20-80 theoretical plates and the ratio of the amount of liquid at the upper end of the dividing wall going to the enrichment section and the stripping section of the column is set in the range from 1:0.2 to 1:5.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: August 4, 2020
    Assignee: BASF SE
    Inventors: Ortmund Lang, Bernd Metzen, Claus Hechler
  • Publication number: 20200239400
    Abstract: A process for continuously preparing a butyl acrylate H2C?CH—C(?O)OR, with R=n-butyl or isobutyl, wherein aqueous 3-hydroxypropionic acid is converted under dehydrating and esterifying conditions in the presence of the corresponding butanol R—OH in a reactor with a rectification column and butyl acrylate formed, unconverted butanol and water used and formed are distilled off overhead as a ternary azeotrope, after separation into a liquid aqueous phase and liquid organic phase each of the aqueous and organic phases is at least partly discharged, and the organic phase comprising the butyl acrylate and the butanol is subjected to distillative separation.
    Type: Application
    Filed: August 13, 2018
    Publication date: July 30, 2020
    Applicant: BASF SE
    Inventors: Ortmund LANG, Tim BLASCHKE, Christian RAITH, Michael SCHAFRANKA, Claus HECHLER
  • Publication number: 20200095185
    Abstract: A process for isolating pure butyl acrylate from crude butyl acrylate, which is carried out in a dividing wall column having separation-active internals and a vaporizer, and in which: a dividing wall is arranged in a longitudinal direction of the column to form an upper joint column region, a lower joint column region, an inflow section having a side feed point and an offtake section having a side offtake point; a ratio of an amount of liquid at an upper end of the dividing wall going to an enrichment section and a stripping section of the column is set in the range from 1:0.2 to 1:5; and a ratio of an amount of vapor streams at a lower end of the dividing wall going to the stripping section and the enrichment section of the column is set in a range from 1:0.5 to 1:2.0.
    Type: Application
    Filed: December 10, 2017
    Publication date: March 26, 2020
    Applicant: BASF SE
    Inventors: Ortmund LANG, Bernd METZEN, Claus HECHLER
  • Publication number: 20200094160
    Abstract: Process for isolating pure 2-ethylhexyl acrylate or pure 2-propylheptyl acrylate from the corresponding crude alkyl acrylate by distillation, wherein the process is carried out in a dividing wall column (1) which has separation-active internals and vaporizer (7) and in which a dividing wall (8) is arranged in the longitudinal direction of the column to form an upper joint column region (9), a lower joint column region (14), an inflow section (10, 12) having a side feed point (2) and an offtake section (11, 13) having a side offtake point (3), the column has a number of theoretical plates in the range from 10 to 60, where the number of theoretical plates of the dividing wall column (1) relates to the sum of the theoretical plates in the joint upper column region (9), the joint lower column region (14) and the inflow section (10, 12), the side feed point (2) for the corresponding crude alkyl acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost
    Type: Application
    Filed: December 11, 2017
    Publication date: March 26, 2020
    Applicant: BASF SE
    Inventors: Ortmund LANG, Bernd METZEN, Claus HECHLER
  • Publication number: 20190330137
    Abstract: Process for isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation, wherein the process is carried out in a dividing wall column (1) which has separation-active internals and vaporizer (7) and in which a dividing wall (8) is arranged in the longitudinal direction of the column to form an upper joint column region (9), a lower joint column region (14), an inflow section (10, 12) having a side feed point (2) and an offtake section (11, 13) having a side offtake point (3), the column has a number of theoretical plates in the range from 20 to 80, where the number of theoretical plates of the dividing wall column (1) relates to the sum of the theoretical plates in the joint upper column region (9), the joint lower column region (14) and the inflow section (10, 12), the side feed point (2) for the crude tert-butyl (meth)acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least
    Type: Application
    Filed: December 11, 2017
    Publication date: October 31, 2019
    Applicant: BASF SE
    Inventors: Ortmund LANG, Bernd METZEN, Claus HECHLER
  • Patent number: 10301252
    Abstract: A process for continuously preparing the tert-butyl ester of an ethylenically unsaturated carboxylic acid, by a) reacting an ethylenically unsaturated carboxylic acid with isobutene in the presence of an acidic catalyst to give an esterification mixture; b) removing the acidic catalyst; c) removing low-boiling components; and d) supplying a tert-butyl ester-comprising liquid to a distillation apparatus and subjecting it to purifying distillation in the distillation apparatus, where d1) in the distillation apparatus the tert-butyl ester-comprising liquid is separated into a tert-butyl ester-comprising gaseous top product and a carboxylic acid-comprising liquid bottom product; d2) the tert-butyl ester-comprising gaseous top product is at least partly condensed and the condensate is recycled partly as reflux to the distillation apparatus; d3) the carboxylic acid-comprising liquid bottom product is recycled at least partly to step a); d4) carboxylic acid-comprising liquid bottom product is drawn off and passed to
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: May 28, 2019
    Assignee: BASF SE
    Inventors: Catharina Horstmann, Claus Hechler, Gregor Grackiewicz, Bernd Schall
  • Publication number: 20190002389
    Abstract: A process for continuously preparing the tert-butyl ester of an ethylenically unsaturated carboxylic acid, by a) reacting an ethylenically unsaturated carboxylic acid with isobutene in the presence of an acidic catalyst to give an esterification mixture; b) removing the acidic catalyst; c) removing low-boiling components; and d) supplying a tert-butyl ester-comprising liquid to a distillation apparatus and subjecting it to purifying distillation in the distillation apparatus, where d1) in the distillation apparatus the tert-butyl ester-comprising liquid is separated into a tert-butyl ester-comprising gaseous top product and a carboxylic acid-comprising liquid bottom product; d2) the tert-butyl ester-comprising gaseous top product is at least partly condensed and the condensate is recycled partly as reflux to the distillation apparatus; d3) the carboxylic acid-comprising liquid bottom product is recycled at least partly to step a); d4) carboxylic acid-comprising liquid bottom product is drawn off and passed to
    Type: Application
    Filed: November 28, 2016
    Publication date: January 3, 2019
    Inventors: Catharina HORSTMANN, Claus HECHLER, Gregor GWACKIEWICZ, Bernd SCHALL
  • Patent number: 10023520
    Abstract: A process for continuously preparing the tert-butyl ester of an aliphatic C1-C4 carboxylic acid comprises: a) the reaction of an aliphatic C1-C4 carboxylic acid with isobutene in the presence of an acidic catalyst to give an esterification mixture (G1); b) the partial evaporation of the esterification mixture (G1), giving a liquid first high boiler phase (SPh1) comprising the acidic catalyst, and a first vapor (B1) comprising tert-butyl ester; c) the fractional condensation of the first vapor (B1) by partially condensing the first vapor (B1) at a first pressure and a first temperature and obtaining a first condensate (K1), partially condensing the uncondensed second vapor (B2) at a second pressure and a second temperature and obtaining a second condensate (K2), the first temperature being 0 to 45° C. below the condensation temperature of the tert-butyl ester at the first pressure and the second temperature being 45 to 80° C.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: July 17, 2018
    Assignee: BASF SE
    Inventors: Catharina Horstmann, Claus Hechler, Gregor Grackiewicz, Bernd Schall
  • Publication number: 20160289159
    Abstract: A process for continuously preparing the tert-butyl ester of an aliphatic C1-C4 carboxylic acid comprises: a) the reaction of an aliphatic C1-C4 carboxylic acid with isobutene in the presence of an acidic catalyst to give an esterification mixture (G1); b) the partial evaporation of the esterification mixture (G1), giving a liquid first high boiler phase (SPh1) comprising the acidic catalyst, and a first vapor (B1) comprising tert-butyl ester; c) the fractional condensation of the first vapor (B1) by partially condensing the first vapor (B1) at a first pressure and a first temperature and obtaining a first condensate (K1), partially condensing the uncondensed second vapor (B2) at a second pressure and a second temperature and obtaining a second condensate (K2), the first temperature being 0 to 45° C. below the condensation temperature of the tert-butyl ester at the first pressure and the second temperature being 45 to 80° C.
    Type: Application
    Filed: March 31, 2016
    Publication date: October 6, 2016
    Applicant: BASF SE
    Inventors: Catharina HORSTMANN, Claus Hechler, Gregor Grackiewicz, Bernd Schall
  • Patent number: 9388118
    Abstract: A continuous process for preparing (meth)acrylates of C10-alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C10-alcohols composed of 2-propylheptanol as the main isomer and at least one of the C10-alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 12, 2016
    Assignee: BASF SE
    Inventors: Ulrich Jaeger, Volker Schliephake, Ortmund Lang, Jochen Petzoldt, Tobias Johannes Korn, Virginie Bette, Claus Hechler
  • Patent number: 8835575
    Abstract: A process for continuously producing water-absorbing polymer particles, wherein the monomer stems from at least two different sources and the monomer from one source differs from the monomer from at least one other source in the content of at least one secondary component.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: September 16, 2014
    Assignee: BASF SE
    Inventors: Wilfried Heide, Claus Hechler, Marc Gerardus Nicolas Grimmon, Filip Mees, Karl J. Possemiers
  • Publication number: 20140135523
    Abstract: A continuous process for preparing (meth)acrylates of C10-alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C10-alcohols composed of 2-propylheptanol as the main isomer and at least one of the C10-alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.
    Type: Application
    Filed: September 27, 2013
    Publication date: May 15, 2014
    Applicant: BASF SE
    Inventors: Ulrich JAEGER, Volker SCHLIEPHAKE, Ortmund LANG, Jochen PETZOLDT, Tobias Johannes KORN, Virginie BETTE, Claus HECHLER
  • Patent number: 8721996
    Abstract: A shell which encloses an interior and has at least one first orifice for feeding at least one gas stream into the interior and at least one second orifice for withdrawing a gas stream fed to the interior beforehand via the at least one first orifice from the interior, the surface of the shell, on its side in contact with the interior, being manufactured at least partly, in a layer thickness of at least 1 mm, from a steel which has a specific elemental composition, and in the interior, a process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated is carried out in a reactor which is manufactured from the steel on its side in contact with the reaction gas.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: May 13, 2014
    Assignee: BASF SE
    Inventors: Claus Hechler, Wilhelm Ruppel, Goetz-Peter Schindler, Catharina Klanner, Hans-Juergen Bassler, Martin Dieterle, Karl-Heinrich Klappert, Klaus Joachim Mueller-Engel
  • Patent number: 8721997
    Abstract: A process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated in a reactor which is manufactured from a composite material which consists, on its side in contact with the reaction chamber, of a steel B with specific elemental composition which, on its side facing away from the reaction chamber, either directly or via an intermediate layer of copper, or of nickel, or of copper and nickel, is plated onto a steel A with specific elemental composition, and also partial oxidations of the dehydrogenated hydrocarbon and the reactor itself.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: May 13, 2014
    Assignee: BASF SE
    Inventors: Claus Hechler, Wilhelm Ruppel, Goetz-Peter Schindler, Catharina Klanner, Hans-Juergen Bassler, Martin Dieterle, Karl-Heinrich Klappert, Klaus Joachim Mueller-Engel
  • Patent number: 8431743
    Abstract: The present invention relates to a process for preparing acrylic acid by two-stage heterogeneously catalyzed partial gas phase oxidation of propylene, in which the propylene source used is a preceding propane dehydrogenation and in which the first oxidation stage is operated with restricted propylene conversion, and unconverted propane and propylene present in the product gas mixture of the second partial oxidation stage are recycled substantially into the preceding propane dehydrogenation.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: April 30, 2013
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Dieterle, Klaus Joachim Mueller-Engel, Claus Hechler, Ulrich Hammon, Armin Diefenbacher
  • Patent number: 7910766
    Abstract: A process for preparing at least one partial oxidation and/or ammoxidation product of a hydrocarbon by partially dehydrogenating at least one saturated hydrocarbon H under heterogeneous catalysis and using the resulting product gas mixture A, which comprises the partially dehydrogenated hydrocarbon H, as such or in modified form for heterogeneously catalyzed partial oxidation and/or ammoxidation of the partially dehydrogenated hydrocarbon present in the product gas mixture A, said process including at least one mechanical separating operation inserted between the product gas mixture A and the heterogeneously catalyzed partial oxidation and/or ammoxidation.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: March 22, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Goetz-Peter Schindler, Otto Machhammer, Klaus Joachim Mueller-Engel, Claus Hechler, Jochen Petzoldt, Christoph Adami, Klaus Harth
  • Publication number: 20110038763
    Abstract: A process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated in a reactor which is manufactured from a composite material which consists, on its side in contact with the reaction chamber, of a steel B with specific elemental composition which, on its side facing away from the reaction chamber, either directly or via an intermediate layer of copper, or of nickel, or of copper and nickel, is plated onto a steel A with specific elemental composition, and also partial oxidations of the dehydrogenated hydrocarbon and the reactor itself.
    Type: Application
    Filed: October 26, 2010
    Publication date: February 17, 2011
    Applicant: BASF SE
    Inventors: Claus Hechler, Wilhelm Ruppel, Götz-Peter Schindler, Catharina Klanner, Hans-Jürgen Bassler, Martin Dieterle, Karl-Heinrich Klappert, Klaus Joachim Müller-Engel
  • Patent number: 7847118
    Abstract: A process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated in a reactor which is manufactured from a composite material which consists, on its side in contact with the reaction chamber, of a steel B with specific elemental composition which, on its side facing away from the reaction chamber, either directly or via an intermediate layer of copper, or of nickel, or of copper and nickel, is plated onto a steel A with specific elemental composition, and also partial oxidations of the dehydrogenated hydrocarbon and the reactor itself.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: December 7, 2010
    Assignee: BASF SE
    Inventors: Claus Hechler, Wilhelm Ruppel, Martin Dieterle, Karl-Heinrich Klappert, Klaus Joachim Mueller-Engel, Goetz-Peter Schindler, Catharina Klanner, Hans-Juergen Bassler
  • Patent number: 7842846
    Abstract: A process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a reaction gas mixture input stream comprising the hydrocarbon to be dehydrogenated is conducted through a fixed catalyst bed disposed in a shaft and the reaction gas mixture input stream is obtained in the shaft by metering an input gas II comprising molecular oxygen upstream of the fixed catalyst bed into an input gas stream I which comprises molecular hydrogen and the hydrocarbon to be dehydrogenated and is flowing within the shaft toward the fixed catalyst bed.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: November 30, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Claus Hechler, Wilhelm Ruppel, Wolfgang Gerlinger, Wolfgang Schneider, Klaus Joachim Mueller-Engel
  • Patent number: RE44822
    Abstract: A process for heterogeneously catalyzed partial dehydrogenation of a hydrocarbon, in which a reaction gas mixture input stream comprising the hydrocarbon to be dehydrogenated is conducted through a fixed catalyst bed disposed in a shaft and the reaction gas mixture input stream is obtained in the shaft by metering an input gas II comprising molecular oxygen upstream of the fixed catalyst bed into an input gas stream I which comprises molecular hydrogen and the hydrocarbon to be dehydrogenated and is flowing within the shaft toward the fixed catalyst bed.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: April 1, 2014
    Assignee: BASF SE
    Inventors: Claus Hechler, Wilhelm Ruppel, Wolfgang Gerlinger, Wolfgang Schneider, Klaus Joachim Mueller-Engel