Patents by Inventor Helmuth Menig
Helmuth Menig 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: 20080203355Abstract: The present application relates to a process for preparing a solution of cyanide salts, comprising the steps of: a) preparing a crude gas comprising hydrocyanic acid by dehydrating formamide up to a formamide conversion of ?97%; b) if appropriate, acid-scrubbing the crude gas obtained in step a); c) subsequently reacting the crude gas obtained in step a) or, if appropriate, in step b) with an aqueous solution of a hydroxide, M(OH)x, where M is selected from the group consisting of alkali metals and alkaline earth metals and x is dependent upon the oxidation state of M and is 1 or 2.Type: ApplicationFiled: May 31, 2006Publication date: August 28, 2008Applicant: BASF AktiengesellschaftInventors: Andreas Deckers, Thomas Schneider, Helmuth Menig
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Patent number: 7294326Abstract: The present invention relates to a process for preparing hydrocyanic acid (HCN) by catalytic dehydration of gaseous formamide in a reactor which has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to a reactor for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide, which reactor has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to the use of the reactor of the present invention in a process for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide.Type: GrantFiled: December 3, 2003Date of Patent: November 13, 2007Assignee: BASF AktiengesellschaftInventors: Peter Bassler, Wolfgang Siegel, Guenther Achhammer, Anton Negele, Helmuth Menig, Wilhelm Ruppel, Peter Zehner, Hermann Luyken, Volker Vogt
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Publication number: 20060110309Abstract: The present invention relates to a process for preparing hydrocyanic acid (HCN) by catalytic dehydration of gaseous formamide in a reactor which has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to a reactor for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide, which reactor has an internal reactor surface made of a steel comprising iron and chromium and nickel, and also to the use of the reactor of the present invention in a process for preparing hydrocyanic acid by catalytic dehydration of gaseous formamide.Type: ApplicationFiled: December 3, 2003Publication date: May 25, 2006Inventors: Peter Babler, Wolfgang Siegel, Gunther Achhammer, Anton Negele, Helmuth Menig, Wilhelm Ruppel, Peter Zehmer, Hermann Luyken, Wolker Vogt
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Publication number: 20020018744Abstract: In a continuous process for preparing hydrocyanic acid by thermolysis of gaseous, superheated formamide at elevated temperature and reduced pressure in the presence of a finely divided solid catalyst in a thermolysis reactor, the solid catalyst is kept in motion by upward-directed or downward-directed vertical flow of the gaseous reaction mixture.Type: ApplicationFiled: December 12, 2000Publication date: February 14, 2002Inventors: Wolfgang Mattmann, Walter Lenz, Helmuth Menig, Wolfgang Siegel
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Patent number: 6255534Abstract: Carbonyl compounds of the formula where R1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R2 is a hydrogen atom, an unsubstituted or C1-C3-alkyl-monosubstituted to -trisubstituted C2-C4-alkenyl radical or a radical of the formula where R3 is a hydrogen atom or together with R4 is an oxygen atom, R4 is the radical OR6 or together with R3 is an oxygen atom, R5 is a hydrogen atom, an alkyl radical having from 1 to 8 carbon atoms, an unsubstituted or C1-C3-alkyl-monosubstituted to -trisubstituted C2-C4-alkenyl radical or a cyclohexyl or cyclopentyl radical and R6 is an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula —CH2—CHO or —CH2—CH2—O—CH2—CHO, are prepared by gas-phase oxidation of methanol or alcohols of the formula where R1 and R5 are as defined above, by means of an oxygen-containing gas in the presence of copper- and/or silvType: GrantFiled: February 1, 1999Date of Patent: July 3, 2001Assignee: BASF AktiengesellschaftInventors: Dirk Demuth, Thomas Fetzer, Volker Pratsch, Thomas Wendrich, Helmuth Menig, Ludwig Wambach, Klaus Harth
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Patent number: 6214172Abstract: In a process for the preparation of methylglyoxal dimethyl acetal from methylglyoxal and methanol in the presence of an acidic ion exchanger, water is introduced in an amount sufficient to form an acidic reaction mixture in which the acetal product and water form an azeotropic mixture, with or without the retention of some methanol reactant. After subjecting a single phase acidic reaction mixture to an azeotropic distillation, it will separate into two distinct liquid phases with a simple recovery of the acetal product from the aqueous phase.Type: GrantFiled: April 25, 1997Date of Patent: April 10, 2001Assignee: BASF AktiengesellschaftInventors: Carsten Gröning, Klaus Ebel, Gerd Kaibel, Jörg Therre, Jürgen Koopmann, Helmuth Menig, Gerhard Fritz, Rainer Dietz
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Patent number: 6133482Abstract: In a process for preparing carbonyl compounds of the formula ##STR1## where R.sup.1 is a hydrogen atom or an alkyl radical having from 1 to 3 carbon atoms, R.sup.2 is a hydrogen atom or a radical of the formula ##STR2## where R.sup.3 is a hydrogen atom or together with R.sup.4 is an oxygen atom, R.sup.4 is the radical OR.sup.6 or together with R.sup.3 is an oxygen atom, R.sup.5 is a hydrogen atom, an alkyl radical having from 1 to 8 carbon atoms or a cyclohexyl or cyclopentyl radical and R.sup.6 is an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula --CH.sub.2 --CHO or --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CHO, by gas-phase oxidation of methanol or alcohols of the formula ##STR3## where R.sup.1 and R.sup.5 are as defined above and R.sup.7 is a hydrogen atom or a radical OR.sup.8 and R.sup.8 is a hydrogen atom, an alkyl radical having from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical for the formula --CH.sub.2 --CH.sub.Type: GrantFiled: June 16, 1999Date of Patent: October 17, 2000Assignee: BASF AktiengesellschaftInventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
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Patent number: 6072087Abstract: The present invention relates to a process for the preparation of carbonyl compounds of the formula ##STR1## in which R.sup.1 denotes a hydrogen atom or an alkyl radical containing from 1 to 3 carbon atoms, R.sup.2 denotes a hydrogen atom or a radical of the formula ##STR2## in which R.sup.3 denotes a hydrogen atom or, together with R.sup.4, an oxygen atom, R.sup.4 denotes the radical OR.sup.6 or, together with R.sup.3, an oxygen atom, R.sup.5 denotes a hydrogen atom or an alkyl radical containing from 1 to 8 carbon atoms or a cyclohexyl or cyclopentyl radical, and R.sup.6 denotes an alkyl radical containing from 1 to 4 carbon atoms, a cyclohexyl or cyclopentyl radical or a radical of the formula--CH.sub.2 --CHO or --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CHO,by gas-phase oxidation of methanol or alcohols of the formula ##STR3## in which R.sup.1 and R.sup.5 have the meanings specified above and R.sup.7 denotes a hydrogen atom or a radical OR.sup.8, and R.sup.Type: GrantFiled: June 16, 1999Date of Patent: June 6, 2000Assignee: BASF AktiengesellschaftInventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
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Patent number: 5936126Abstract: A process for the hydrogenation of an aromatic compound, in which at least one hydroxyl group is attached to an aromatic core, or an aromatic compound, in which at least one amino group is attached to an aromatic core, in the presence of a catalyst containing, as active metal, ruthenium and optionally one or more other Group IB, VIIB, or VIIIB metals, applied to a macroporous support.Type: GrantFiled: June 18, 1997Date of Patent: August 10, 1999Assignee: BASF AktiengesellschaftInventors: Thomas Ruhl, Boris Breitscheidel, Jochem Henkelmann, Wolfgang Reif, Helmuth Menig, Sabine Weiguny
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Patent number: 4560769Abstract: Pyrroles are prepared by a process in which ammonia or an amine is reacted with a but-2-ene-1,4-diol in the presence of a supported catalyst containing copper, silver, zinc, palladium, nickel, cobalt and/or platinum and/or compounds of these metals as catalytic materials, and in the presence or absence of compounds of chromium and/or manganese as additional catalysts, in the gas phase.The pyrroles obtainable by the process of the invention are useful starting materials for the preparation of dyes, corrosion inhibitors, drugs and pesticides.Type: GrantFiled: March 9, 1984Date of Patent: December 24, 1985Assignee: BASF AktiengesellschaftInventors: Helmuth Menig, Martin Fischer, Karl Baer