Patents by Inventor Thomas Kalz

Thomas Kalz 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: 20060069251
    Abstract: The invention relates to processes, which can be performed on an industrial scale, for the production of norgalanthamine, norgalanthamine derivatives and isomers thereof of general formula (A) as well as salts or hydrates thereof with general formula (B). As processes for the production of compounds with general formula (A) or (B), an oxidative demethylation and a catalytic demethylation of the corresponding galanthamine compounds are indicated.
    Type: Application
    Filed: January 9, 2003
    Publication date: March 30, 2006
    Inventors: Ulrich Jordis, Matthias Treu, Manfred Hirnschall, Johannes Frohlich, Laszlo Crollner, Beate Kalz, Thomas Kalz, Peter Kuhnhackl
  • Patent number: 6916947
    Abstract: The present invention is directed to a method for producing amino acids by reacting halogenated carboxylic acid ester (haloacid esters) with a metal cyanate in the presence of an alcohol and by subsequent acidic saponification of the urethane carbonic acid formed. The method is characterized by the metal cyanate being placed at an elevated temperature in an organic solvent and the other reactants being continuously charged into the mixture over a defined time period.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: July 12, 2005
    Assignee: Degussa AG
    Inventors: Oliver Meyer, Thomas Kalz, Karlheinz Drauz
  • Publication number: 20030120084
    Abstract: The present invention is directed to a method for producing amino acids by reacting halogenated carboxylic acid ester (haloacid esters) with a metal cyanate in the presence of an alcohol and by subsequent acidic saponification of the urethane carbonic acid formed. The method is characterized by the metal cyanate being placed at an elevated temperature in an organic solvent and the other reactants being continuously charged into the mixture over a defined time period.
    Type: Application
    Filed: November 25, 2002
    Publication date: June 26, 2003
    Applicant: Degussa AG
    Inventors: Oliver Meyer, Thomas Kalz, Karlheinz Drauz
  • Publication number: 20010021787
    Abstract: Cyanoacetamide is prepared without additional catalyst by esterification of crude cyanoacetic acid with a monohydric alcohol which forms an azeotrope with water and has 4 to 10 carbon atoms, reacting the resulting ester with ammonia in the presence of a basic catalyst to give cyanoacetamide, and work-up by a mechanical separating operation and a thermal treatment.
    Type: Application
    Filed: February 27, 2001
    Publication date: September 13, 2001
    Applicant: DEGUSSA-HUELS AKTIENGESELLSCHAFT
    Inventors: Manuela Imig, Manfred Kaufhold, Thomas Kalz
  • Patent number: 6288264
    Abstract: Cyanoacetamide is prepared without additional catalyst by esterification of crude cyanoacetic acid with a monohydric alcohol which forms an azeotrope with water and has 4 to 10 carbon atoms, reacting the resulting ester with ammonia in the presence of a basic catalyst to give cyanoacetamide, and work-up by a mechanical separating operation and a thermal treatment.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: September 11, 2001
    Assignee: Degussa-Huels Aktiengesellschaft
    Inventors: Manuela Imig, Manfred Kaufhold, Thomas Kalz
  • Patent number: 5728873
    Abstract: A process for the preparation of cyclopropanamine by Hofmann degradation of cyclopropanecarboxamide, comprising the following steps:(1) suspending cyclopropanecarboxamide, either (A) in 1.1 to 4 mol of sodium hydroxide, in solution whose concentration is 10 to 50%, per mol of amide, or (B) in a sparing amount of water,(2) adding 1 to 1.5 mol of hypochlorite, per mol of amide, from a 5 to 15% strength hypochlorite solution at a temperature of 0.degree. to 20.degree. C.,(3) adding 1.1 to 4 mol of sodium hydroxide, in solution whose concentration is 10 to 50%, per mol of amide, in the case where a suspension has been formed according to step (1)(B),(4) reacting the amide, hypochlorite, and sodium hydroxide for 10 to 60 minutes to form a homogeneous reaction mixture,(5) continuously passing the homogeneous reaction mixture through a tubular reactor at a temperature of 45.degree. to 260.degree. C.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: March 17, 1998
    Assignee: Huels Aktiengesellschaft
    Inventors: Wolfgang Kleemiss, Thomas Kalz