Patents by Inventor Alexander Sajtos

Alexander Sajtos 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: 20200369593
    Abstract: The invention relates to a process for the manufacture of an alkylfluoroacrylate starting from alkylfluoroacetate and an oxalic acid ester, wherein an alkane liquid under the reaction conditions is applied as the solvent in one of the reaction steps.
    Type: Application
    Filed: June 8, 2020
    Publication date: November 26, 2020
    Applicant: Patheon Austria GmbH & Co KG
    Inventors: Peter Kapitan, Alexander Sajtos
  • Publication number: 20150368178
    Abstract: The invention relates to a process for the manufacture of an alkylfluoroacrylate starting from alkylfluoroacetate and an oxalic acid ester, wherein an alkane liquid under the reaction conditions is applied as the solvent in one of the reaction steps.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 24, 2015
    Applicant: DPX Fine Chemicals Austria GMBH & Co KG
    Inventors: Peter Kapitan, Alexander Sajtos
  • Patent number: 7169950
    Abstract: The invention relates to a method for producing monocarbonyl compounds or biscarbonyl compounds or hydroxyl compounds by ozonizing, unsaturated organic carbon compounds that, per molecule, have one or more olefinic or aromatic double bonds, which can be cleaved by ozone, and by subsequently processing the ozonization products.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: January 30, 2007
    Assignee: DSM Fine Chemicals Austria NFG GmbH & Co KG
    Inventors: Alexander Sajtos, Engelbert Kloimstein, Curt Zimmermann
  • Publication number: 20040073041
    Abstract: The invention relates to a method for producing monocarbonyl compounds or biscarbonyl compounds or hydroxyl compounds by ozonizing, unsaturated organic carbon compounds that, per molecule, have one or more olefinic or aromatic double bonds, which can be cleaved by ozone, and by subsequently processing the ozonization products.
    Type: Application
    Filed: August 29, 2003
    Publication date: April 15, 2004
    Inventors: Alexander Sajtos, Engelbert Kloimstein, Curt Zimmermann
  • Patent number: 5068417
    Abstract: A process for continuous preparation of a concentrated aqueous solution of glyoxylic acid by hydrolysis of glyoxylic acid ester hemiacetals, wherein glyoxylic acid ester hemiacetals are treated with steam in countercurrent in a reactor cascade.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: November 26, 1991
    Assignee: Chemie Linz Gesellschaft m.b.H.
    Inventors: Alexander Sajtos, Engelbert Kloimstein, Karl Hollinger, Lorenz Farnlettner
  • Patent number: 5015760
    Abstract: Preparation of glyoxylic acid or derivatives thereof of the formula ##STR1## in which R denotes an alkyl radical with 1 to 10 C atoms and R.sub.1 denotes an alkyl radical with 1 to 4 C atoms, by ozonolysis of a dialkyl maleate, in which the alkyl radicals each have 1 to 10 C atoms, with the equivalent amount of ozone in an aliphatic alcohol of the formula R.sub.1 OH, and subsequent catalytic hydrogenation, in which the ozonolysis product is continuously introduced into a suspension of the hydrogenation catalyst in the alcohol of the formula R.sub.1 OH such that the peroxide content of the hydrogenation solution is not more than 0.1 mole/liter during the hydrogenation. Glyoxylic acid can be obtained from the resulting acetals of the formula I by hydrolysis.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: May 14, 1991
    Assignee: Chemie Linz Aktiengesellschaft
    Inventor: Alexander Sajtos
  • Patent number: 4769464
    Abstract: The invention relates to a process for the preparation of monocarbonyl or biscarbonyl compounds by reacting organic carbon compounds having one or more olefinic or aromatic double bonds in the molecule with the equivalent amount of ozone and by subsequently catalytically hydrogenating the ozonization products, wherein the peroxide-containing ozonization solution is fed continuously into a suspension of the hydrogenation catalyst in a lower aliphatic alcohol, while a peroxide content of not more than 0.1 mole/l is maintained, and the ozonization products are continuously cleaved reductively to give the corresponding carbonyl compounds.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: September 6, 1988
    Assignee: Chemie Linz Gesellschaft m.b.H.
    Inventor: Alexander Sajtos
  • Patent number: 4607126
    Abstract: The invention relates to a process for the preparation of glyoxal, alkylglyoxals and acetals thereof by reacting .alpha.,.beta.-unsaturated dialkylacetals with the equivalent amount of ozone and subsequently subjecting the ozonization products to catalytic hydrogenation, the peroxide-containing ozonization solution being fed continuously into a suspension of the hydrogenation catalyst, while a peroxide content of not more than 0.1 mole/liter is maintained, and cleaving the ozonization products by reduction, after which the dialkylacetals formed in the hydrogenation are, if desired, cleaved to give glyoxal or alkylglyoxals.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: August 19, 1986
    Assignee: Chemie Linz Aktiengesellschaft
    Inventor: Alexander Sajtos