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).

  • Publication number: 20080203355
    Abstract: 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: Application
    Filed: May 31, 2006
    Publication date: August 28, 2008
    Applicant: BASF Aktiengesellschaft
    Inventors: Andreas Deckers, Thomas Schneider, Helmuth Menig
  • Patent number: 7294326
    Abstract: 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: Grant
    Filed: December 3, 2003
    Date of Patent: November 13, 2007
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Bassler, Wolfgang Siegel, Guenther Achhammer, Anton Negele, Helmuth Menig, Wilhelm Ruppel, Peter Zehner, Hermann Luyken, Volker Vogt
  • Publication number: 20060110309
    Abstract: 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: Application
    Filed: December 3, 2003
    Publication date: May 25, 2006
    Inventors: Peter Babler, Wolfgang Siegel, Gunther Achhammer, Anton Negele, Helmuth Menig, Wilhelm Ruppel, Peter Zehmer, Hermann Luyken, Wolker Vogt
  • Publication number: 20020018744
    Abstract: 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: Application
    Filed: December 12, 2000
    Publication date: February 14, 2002
    Inventors: Wolfgang Mattmann, Walter Lenz, Helmuth Menig, Wolfgang Siegel
  • Patent number: 6255534
    Abstract: 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 silv
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: July 3, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Dirk Demuth, Thomas Fetzer, Volker Pratsch, Thomas Wendrich, Helmuth Menig, Ludwig Wambach, Klaus Harth
  • Patent number: 6214172
    Abstract: 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: Grant
    Filed: April 25, 1997
    Date of Patent: April 10, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Gröning, Klaus Ebel, Gerd Kaibel, Jörg Therre, Jürgen Koopmann, Helmuth Menig, Gerhard Fritz, Rainer Dietz
  • Patent number: 6133482
    Abstract: 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: Grant
    Filed: June 16, 1999
    Date of Patent: October 17, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
  • Patent number: 6072087
    Abstract: 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: Grant
    Filed: June 16, 1999
    Date of Patent: June 6, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Dirk Demuth, Heinz Rutter, Helmuth Menig, Peter Resch, Wilhelm Ruppel, Harro Wache
  • Patent number: 5936126
    Abstract: 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: Grant
    Filed: June 18, 1997
    Date of Patent: August 10, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Ruhl, Boris Breitscheidel, Jochem Henkelmann, Wolfgang Reif, Helmuth Menig, Sabine Weiguny
  • Patent number: 4560769
    Abstract: 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: Grant
    Filed: March 9, 1984
    Date of Patent: December 24, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Helmuth Menig, Martin Fischer, Karl Baer