Patents by Inventor Rudi Kroner

Rudi Kroner 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).

  • Process for the preparation of s-triazine compounds
    Patent number: 8765753
    Abstract: A process is described for the preparation of s-triazine derivatives of the formula in which R is a C1-C12-alkyl radical, by reacting a cyanuric acid halide with a p-aminobenzoic acid ester, which comprises a C6-C12-alkyl radical as radical of the ester alcohol, in a molar ratio of 1:3 to 1:5 in a xylene isomer mixture as solvent. 10 The process is characterized in that the solvent is used in amounts of from 0.6 to 2.1 mol/l.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: July 1, 2014
    Assignee: BASF SE
    Inventor: Rudi Kroner
  • Process for the preparation of s-triazine compounds
    Publication number: 20140005387
    Abstract: A process is described for the preparation of s-triazine derivatives of the formula in which R is a Ci-C12-alkyl radical, by reacting a cyanuric acid halide with a p-aminobenzoic acid ester, which comprises a C6-C12-alkyl radical as radical of the ester alcohol, in a molar ratio of 1:3 to 1:5 in a xylene isomer mixture as solvent. 10 The process is characterized in that the solvent is used in amounts of from 0.6 to 2.1 mol/l.
    Type: Application
    Filed: March 21, 2012
    Publication date: January 2, 2014
    Applicant: BASF SE
    Inventor: Rudi Kroner
  • Synthesis of 1-(2-sulfoethyl)-pyridinium betaine
    Patent number: 6403800
    Abstract: Described is a process for preparing 1-(2-sulfoethyl)pyridinium betaine wherein pyridine is reacted with a sulfoethylating agent from the group consisting of carbyl sulfate, ethionic acid and its salt and vinylsulfonic acid and vinylsulfonate, the reaction taking place in aqueous solution or in pyridine.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: June 11, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Elisabeth Kappes, Gregor Brodt, Rudi Kröner, Norbert Wagner, Sören Hildebrandt, Thomas Bogenstätter
  • Corrosion inhibition
    Patent number: 6077460
    Abstract: The invention relates to the use of at least one compound of general formula (I), ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another represent a hydrogen atom or an alkyl or alkenyl radical; R.sub.4 represents an alkyl or alkenyl radical, and n represents 1 to 5; or of an acid addition salt thereof, as an inhibitor of corrosion in the extraction, processing, storage and transportation of crude oil and natural gas, and to a process for the preparation of this compound.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: June 20, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Knut Oppenlander, Gunter Oetter, Rudi Kroner, Norbert Mahr, Hans-Jurgen Jatzek, Klaus Taeger
  • Recycling of diaphragms
    Patent number: 5899393
    Abstract: The invention relates to a process for recycling diaphragms, in particular a process for recycling used asbestos-free diaphragms from alkali metal chloride electrolysis, the diaphragm material being comminuted, the diaphragm material being washed with a wash substrate and a reusable material being obtained.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: May 4, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich
  • Recycling of diaphragms
    Patent number: 5876785
    Abstract: The invention relates to a process for recycling diaphragms, in particular a process for recycling used asbestos-free diaphragms from alkali metal chloride electrolysis, the diaphragm material being comminuted, the diaphragm material being washed with a wash substrate and a reusable material being obtained.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: March 2, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich
  • Recycling of diaphragms
    Patent number: 5765763
    Abstract: The invention relates to a process for recycling diaphragms, in particular a process for recycling used asbestos-free diaphragms from alkali metal chloride electrolysis, the diaphragm material being comminuted, the diaphragm material being washed with a wash substrate and a reusable material being obtained.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: June 16, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich
  • Regeneration of plastic diaphragm
    Patent number: 5755951
    Abstract: A process for the regeneration of plastic diaphragms is described, in which a mineral acid solution is mixed with a suitable corrosion inhibitor, this mixture is temperature controlled at from approximately 0.degree. to 100.degree. C., preferably 40.degree. to 80.degree. C., in particular 50.degree. to 70.degree. C., and passed through the diaphragm for from approximately 0.1 to 84 hours, preferably 1 to 72 hours, in particular 2 to 24 hours.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: May 26, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Hans-Michael Schneider, Holger Friedrich, Kurt Hecky, Dieter Schlafer, Wolfgang Steiner