Patents by Inventor Gert Buerger

Gert Buerger 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).

  • Patent number: 6743404
    Abstract: A reactor for the catalytic oxidation of ammonia to form nitrogen oxides which has a noble metal gauze catalyst and a heat exchanger in that order in the direction of flow, a catalyst for the decomposition of N2O is located between the noble metal gauze catalyst and the heat exchanger and in a process for the catalytic decomposition of N2O in a gas mixture obtained in the preparation of nitric acid by catalytic oxidation of ammonia, where the N2O is decomposed catalytically over a catalyst of the decomposition of N2O, the hot gas mixture obtained from the catalytic oxidation of ammonia is brought to contact with the catalyst for the decomposition of N2O prior to subsequent cooling.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: June 1, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Volker Schumacher, Gert Bürger, Thomas Fetzer, Michael Baier, Michael Hesse
  • Patent number: 6723295
    Abstract: A copper-containing catalyst of the composition of N2O contains a compound of the formula MxAl2O4, where M is Cu or a mixture of Cu and Zn and/or Mg and x is from 0.8 to 1.5. The novel catalyst is used in a process for the catalytic decomposition of pure N2O or N2O contained in gas mixtures, at elevated temperatures.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: April 20, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Michael Baier, Thomas Fetzer, Otto Hofstadt, Michael Hesse, Gert Bürger, Klaus Harth, Volker Schumacher, Hermann Wistuba, Bernhard Otto
  • Patent number: 6124234
    Abstract: Catalysts prepared by combining M--Al.sub.2 O.sub.4 where M is an element of Group Ib, VIIb or VIII of the Periodic Table of the Elements with tin, lead, an element of group IIa or IIb of the Periodic Table of the Elements as oxide or salt or in elemental form and calcining at 300-1300.degree. C. under 0.1-200 bar and the process for preparing them.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: September 26, 2000
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Wolfgang Buechele, Matthias Irgang, Bernhard Otto, Hermann Wistuba, Gert Buerger
  • Patent number: 5612009
    Abstract: A supported silver-containing catalyst for the decomposition of dinitrogen monoxide as pure gas or in admixture with other gases and having an aluminum oxide support which has a specific surface area of from 26 to 350 m.sup.2 /g, and a process for the selective catalytic decomposition of dinitrogen monoxide as pure gas or in admixture with other gases at elevated temperature, in which the said supported catalyst is used.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: March 18, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Wolfgang Buechele, Hermann Wistuba, Claus Witte, Gert Buerger, Guenter Herrmann
  • Patent number: 5587135
    Abstract: A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200.degree.-900.degree. C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl.sub.2 O.sub.3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300.degree.-1300.degree. C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: December 24, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Fetzer, Wolfgang Buechele, Hermann Wistuba, Bernhard Otto, Gert Buerger, Paul Pijl
  • Patent number: 5300269
    Abstract: A catalyst for decomposing dinitrogen monoxide which is pure or present in gas mixtures comprises metallic silver applied to an alumina carrier with a BET surface area of from 5 to 25 m.sup.2 /g.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: April 5, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Aichinger, Karl-Heinz Boehning, Klaus Herzog, Hermann Wistuba, Gert Buerger, Matthias Schwarzmann, Guenter Herrmann
  • Patent number: 5210297
    Abstract: A process for working up mother liquors resulting from the preparation of adipic acid by oxidation of cyclohexanol or cyclohexanone or mixtures thereof with nitric acid entails removal of nitric acid by azeotropic distillation with water, heating the resulting melt at from 130.degree. to 180.degree. C. and then dissolving it in water, treating the aqueous solution with cation exchangers, subsequently again evaporating off the water and heating the resulting dicarboxylic acid melt at from 200.degree. to 240.degree. C. and then obtaining a mixture of dicarboxylic acids by distillation.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: May 11, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Frank, Guenter Herrmann, Gert Buerger, Jost H. Manegold, Stefan Karbach, Ruediger Schmitz
  • Patent number: 4713201
    Abstract: A process for the preparation of salts of dicarboxylic acids and diamines of the formulaH.sub.2 N-(R.sup.1 -O).sub.n -R.sup.2 -NH.sub.2 Iwhere R.sup.1 and R.sup.2 may be identical or different and are each alkylene of 2 to 4 carbon atoms and n is an integer from 1 to 3, which contain hydrazine in the form of hydrazine hydrate.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: December 15, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Pilz, Gert Buerger, Manfred Barl, Gerhard Thiel
  • Patent number: 4713437
    Abstract: Salts of oxaalkylenediamines of the formula IH.sub.2 N--(R.sup.1 --O).sub.n --R.sup.2 --NH.sub.2 Iwhere R.sup.1 and R.sup.2 may be identical or different and are each alkylene of 2 to 4 carbon atoms and n is an integer from 1 to 3, and alkanedicarboxylic acids of 4 to 12 carbon atoms, terephthalic acid or isophthalic acid, which contain hydrazine, their preparation, and nylons prepared from them.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: December 15, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Georg Pilz, Gert Buerger, Manfred Barl, Gerhard Thiel
  • Patent number: 4036783
    Abstract: A supported catalyst containing vanadium and titanium, comprising a ring-shaped carrier having an external diameter of from 7.3 to 8.6 mm, a length of from 5.3 to 7 mm and a wall thickness of from 0.1 to 2 mm, and an active composition, applied thereto, of from 1 to 30 per cent by weight of vanadium pentoxide and from 70 to 99 per cent by weight of titanium dioxide and/or zirconium dioxide.
    Type: Grant
    Filed: February 25, 1976
    Date of Patent: July 19, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Blechschmitt, Peter Reuter, Friedrich Wirth, Gert Buerger, Rolf Seubert
  • Patent number: 4007136
    Abstract: Supported catalyst for the oxidation of o-xylene or naphthalene to phthalic anhydride, comprising an inert carrier and the active material applied thereto, which contains from 1 to 40 per cent by weight of vanadium pentoxide, from 60 to 98.84 per cent by weight of titanium dioxide and from 0.16 to 0.6 per cent by weight, based on titanium dioxide, of rubidium in the form of rubidium oxide, the vanadium pentoxide content being from 0.05 to 4 per cent by weight, based on the (complete) catalyst.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: February 8, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Kurt Blechschmitt, Friedrich Wirth, Paul Hornberger, Peter Reuter, Gert Buerger