Patents by Inventor Andreas Perl
Andreas Perl 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: 9637574Abstract: The present invention relates to a process for preparing alkyl methacrylates and their conversion products which can be used in a multitude of chemical synthesis processes which can lead to a wide variety of different further processing products, and to an apparatus for performing this process.Type: GrantFiled: August 31, 2007Date of Patent: May 2, 2017Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Patent number: 9458083Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).Type: GrantFiled: March 6, 2013Date of Patent: October 4, 2016Assignee: EVONIK ROEHM GmbHInventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
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Patent number: 9169194Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: GrantFiled: March 15, 2013Date of Patent: October 27, 2015Assignee: EVONIK RÖHM GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Publication number: 20150045577Abstract: The present invention relates to a process for hydrolysis of acetone cyanohydrin (ACH) by means of sulphuric acid within the ACH sulpho process for preparation of methacrylic acid (MAA) or methyl methacrylate (MMA).Type: ApplicationFiled: March 6, 2013Publication date: February 12, 2015Applicant: Evonik Roehm GmbHInventors: Arndt Selbach, Lorenza Sartorelli, Andreas Perl, Joachim Deinken, Stefanie Sohnemann, Norbert Mnich, Matthias Groemping, Udo Gropp, Thomas Mertz
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Patent number: 8586779Abstract: The present invention relates in general terms to a process for preparing alkyl methacrylates, comprising as steps: providing an acetone cyanohydrin by a process according to one of the preceding claims; contacting the acetone cyanohydrin with an inorganic acid to obtain a methacrylamide; contacting the methacrylamide with an alcohol in the presence of an inorganic acid in a reactor to obtain an alkyl methacrylate; continuously discharging at least a portion of the alkyl methacrylate from the reactor into a distillation column as a vapor stream; the discharge being effected by feeding a discharge stream comprising steam into the reactor, to an apparatus for preparing alkyl methacrylates, to a process for preparing polymers based at least partly on alkyl methacrylates, to the use of the alkyl methacrylates obtainable by the process according to the invention in chemical products, and to chemical products based on alkyl methacrylates obtainable by the process according to the invention.Type: GrantFiled: August 31, 2007Date of Patent: November 19, 2013Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20130211140Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: ApplicationFiled: March 15, 2013Publication date: August 15, 2013Inventors: Lorenza SARTORELLI, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Patent number: 8334399Abstract: The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture by flowing it through a cooling region of a cooler, the cooler including one cooling element or at least two cooling elements; C.Type: GrantFiled: August 31, 2007Date of Patent: December 18, 2012Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Patent number: 8324424Abstract: The invention relates in general terms to a process for preparing to a process for purifying an alkyl methacrylate, comprising the steps of: A. providing an alkyl methacrylate with an impurity: B. adsorbing at least some of the impurity onto a purifying solid to obtain an ultrapure alkyl methacrylate, to a process for preparing an ultrapure alkyl methacrylate, to an apparatus for preparing alkyl methacrylates, to a process for preparing a polymer based at least partly on alkyl methacrylates, to the use of an alkyl methacrylate obtained according to the invention in chemical products, and to chemical products comprising an alkyl methacrylate obtained according to the invention.Type: GrantFiled: August 31, 2007Date of Patent: December 4, 2012Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Patent number: 8143434Abstract: The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture; C. discharging at least a portion of the acetone cyanohydrin obtained from the reactor; D. continuously distilling the discharged acetone cyanohydrin obtained to obtain an acetone cyanohydrin bottom product and an acetone top product in a distillation column; E. recycling at least a portion of the acetone top product into step A, the acetone top product being kept at less than 60° C.Type: GrantFiled: August 31, 2007Date of Patent: March 27, 2012Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Patent number: 8129559Abstract: The invention relates to a process for preparing acetone cyanohydrin and to a process for preparing alkyl methacrylates, in which an acetone cyanohydrin as can be prepared in accordance with the present invention is used.Type: GrantFiled: August 31, 2007Date of Patent: March 6, 2012Assignee: Evonik Röhm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20120010430Abstract: The present invention relates to an apparatus for metering flowable media or gases, and to the use thereof.Type: ApplicationFiled: March 26, 2010Publication date: January 12, 2012Applicant: Evonik Roehm GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach, Stefanie Sohnemann, Matthias Groemping, Norbert Mnich, Thomas Mertz
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Publication number: 20100249449Abstract: The present invention relates to a process for preparing carboxamides by amidating nitriles in the presence of sulphuric acid, wherein the reaction is performed in a Taylor reactor. The process enables a simple and inexpensive preparation of these compounds. The present invention further provides processes for preparing (meth)acrylamides and alkyl(meth)acrylates, which comprise an inventive amidation reaction.Type: ApplicationFiled: August 15, 2008Publication date: September 30, 2010Applicant: Evonik Roehm GmbHInventors: Lorenza Sartorelli, Andreas Perl, Udo Gropp, Arndt Selbach
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Publication number: 20100076214Abstract: The invention relates to a process for preparing acetone cyanohydrin and to a process for preparing alkyl methacrylates, in which an acetone cyanohydrin as can be prepared in accordance with the present invention is used.Type: ApplicationFiled: August 31, 2007Publication date: March 25, 2010Applicant: Evonik Roehm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20100069662Abstract: The subject-matter of the present invention relates in principle to a process for preparing alkyl esters of methacrylic acid and its conversion products, which can be used in a multitude of chemical synthesis processes which can lead to a wide variety of different further processing products, and to an apparatus for performing this process.Type: ApplicationFiled: August 31, 2007Publication date: March 18, 2010Applicant: Evonik Roehm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20100069594Abstract: The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture; C. discharging at least a portion of the acetone cyanohydrin obtained from the reactor; D. continuously distilling the discharged acetone cyanohydrin obtained to obtain an acetone cyanohydrin bottom product and an acetone top product in a distillation column; E. recycling at least a portion of the acetone top product into step A, the acetone top product being kept at less than 60° C.Type: ApplicationFiled: August 31, 2007Publication date: March 18, 2010Applicant: Evonik Roehm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20100056742Abstract: The present invention relates to a process for preparing alkyl methacrylates and their conversion products which can be used in a multitude of chemical synthesis processes which can lead to a wide variety of different further processing products, and to an apparatus for performing this process.Type: ApplicationFiled: August 31, 2007Publication date: March 4, 2010Applicant: Evonik Roehm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20100029881Abstract: The present invention relates in general terms to a process for preparing alkyl methacrylates, comprising as steps: providing an acetone cyanohydrin by a process according to one of the preceding claims; contacting the acetone cyanohydrin with an inorganic acid to obtain a methacrylamide; contacting the methacrylamide with an alcohol in the presence of an inorganic acid in a reactor to obtain an alkyl methacrylate; continuously discharging at least a portion of the alkyl methacrylate from the reactor into a distillation column as a vapour stream; the discharge being effected by feeding a discharge stream comprising steam into the reactor, to an apparatus for preparing alkyl methacrylates, to a process for preparing polymers based at least partly on alkyl methacrylates, to the use of the alkyl methacrylates obtainable by the process according to the invention in chemical products, and to chemical products based on alkyl methacrylates obtainable by the process according to the invention.Type: ApplicationFiled: August 31, 2007Publication date: February 4, 2010Applicant: EVONIK ROEHM GMBHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20100004417Abstract: The invention relates in general terms to a process for preparing to a process for purifying an alkyl methacrylate, comprising the steps of: A. providing an alkyl methacrylate with an impurity: B. adsorbing at least some of the impurity onto a purifying solid to obtain an ultrapure alkyl methacrylate, to a process for preparing an ultrapure alkyl methacrylate, to an apparatus for preparing alkyl methacrylates, to a process for preparing a polymer based at least partly on alkyl methacrylates, to the use of an alkyl methacrylate obtained according to the invention in chemical products, and to chemical products comprising an alkyl methacrylate obtained according to the invention.Type: ApplicationFiled: August 31, 2007Publication date: January 7, 2010Applicant: Evonik Roehm GmbHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz
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Publication number: 20090299023Abstract: The present invention relates in general terms to a process for preparing acetone cyanohydrin, comprising as steps: A. contacting acetone and hydrocyanic acid in a reactor to give a reaction mixture, the reaction mixture being circulated, to obtain acetone cyanohydrin; B. cooling at least some of the reaction mixture by flowing it through a cooling region of a cooler, the cooler including one cooling element or at least two cooling elements; C.Type: ApplicationFiled: August 31, 2007Publication date: December 3, 2009Applicant: EVONIK ROEHM GMBHInventors: Udo Gropp, Robert Weber, Thomas Schaefer, Andreas Perl, Rudolf Sing, Thomas Mertz