Patents Assigned to Studiengesellschaft
  • Coatings with cross-linked hydrophilic polymers
    Patent number: 6596238
    Abstract: The present invention relates to a process for permanently coating the inner surface of columns, capillaries and microchannel systems with hydroxylic polymers, such as polyvinyl alcohol, and to the thus prepared columns, capillaries and microchannel systems and their use.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: July 22, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Detlev Belder, Heribert Husmann
  • Highly active cationic ruthenium and osmium complexes for olefin metathesis reactions
    Patent number: 6590048
    Abstract: The present invention describes the use of cationic vinylidene, allenylidene and higher cumulenylidene complexes of ruthenium or osmium as catalysts or catalyst precursors for olefin metathesis reactions of all types, as well as to new cationic allenylidene complexes of ruthenium and osmium which can be used as metathesis catalysts with preferred embodiment. These catalysts or catalyst precursors are easy to prepare from well accessible, stable and essentially non toxic starting materials, can be isolated and stored, they exhibit a high catalytic activity, a good compatibility with functional groups, solvents, water and additives, and they need not to be activated by any additive.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: July 8, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Alois Fürstner, Pierre Dixneuf, Christian Bruneau, Michel Picquet
  • Ferrocene-based diphosphonites for asymmetrical catalysis
    Patent number: 6583305
    Abstract: The present invention relates to novel chiral 1,1′-ferrocenylene diphosphonites and the synthesis thereof, in addition to complexes of said compounds with metals from groups VIIb, VIIIb and Ib of the Periodic Table and to the use thereof for enantioselective hydrogenation of olefins, ketones and imines, or enantioselective hydroboration and 1,4-addition to activated olefins.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: June 24, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Andreas Gosberg
  • Method for modifying the dispersion characteristics of metal organic-prestabilized or pre-treated nanometal colloids
    Patent number: 6531304
    Abstract: The present invention relates to a process for modifying the dispersing properties of organometallic-prestabilized or organometallic-pretreated nanometal colloids by reacting reactive metal-carbon bonds in the protective shell to prepare nanometal colloids having a wide range of solubilities in hydrophilic and hydrophobic media including water, to the colloids thus prepared and their use.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: March 11, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Helmut Bönnemann, Werner Brijoux, Rainer Brinkmann
  • Method of producing epoxides
    Patent number: 6525209
    Abstract: The present invention relates to the preparation of epoxides by the oxidation of olefins using molecular oxygen with the addition of an aldehyde additive, characterized in that the oxidation is performed in compressed carbon dioxide as the solvent, which, as compared to many conventional organic solvents, is stable towards oxidation, reduces the danger of explosion and is toxicologically and ecologically safe.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: February 25, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Walter Leitner, Frank Loeker
  • Methods for preparing macrocyclic products by ring-closing diyne metathessis
    Patent number: 6525197
    Abstract: The present invention relates to methods for preparing macrocyclic products having 9 or more ring atoms by ring-closing diyne metathesis of suitable diyne substrates. The diyne substrates can be converted into cycloalkynes or into cycloalkadiynes by cyclodimerization, depending on the particular reaction conditions. Any alkyne metathesis catalyst can be used as the catalyst, regardless of whether said catalysts are heterogeneously or homogeneously present in the reaction medium. The preferred catalysts or pre-catalysts are transition metal alkylidyne complexes, transition metal compounds which form alkylidyne complexes under the reaction conditions, and transition metal compounds with metal-metal triple bonds. The method can be carried out with numerous functional groups, solvents, and additives.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: February 25, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Alois Fürstner, Günter Seidel, Antonio Rumbo, Christian Mathes
  • Rapid X-ray diffraction screening method of polymorph libraries created in multi-well plates
    Patent number: 6507636
    Abstract: Method and device for rapid characterization of arrays of crystalline, polycrystalline or amorphous materials; in particular for the formation and X-ray diffraction analysis of polymorph libraries and the discovery of new crystal forms. According to one aspect, a multi-well plate comprising a masking plate with an array of openings and a removable base plate is used to crystallize precipitates. X-ray diffraction analysis is performed by scanning an X-ray beam over the base plate and recording diffractograms of the crystalline precipitates.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: January 14, 2003
    Assignee: Studiengesellschaft Kohle mbH
    Inventor: Christian W. Lehmann
  • Anticorrosive magnetic nanocolloids protected by precious metals
    Patent number: 6491842
    Abstract: The invention relates to new single- or multi-metallic magnetic colloid particles (for example, Fe, Co, Ni, Fe/Co) having a size of up to 20 nm, the surface of which is protected against corrosion by precious metals, such as Pd, Ag, Pt or Au. The invention also relates to a method for producing such materials. In isolated form or in solution said materials are used among other things as sealing media against dust and gas in magnetic fluid seals (liquid O ring), for lubricating and mounting rotating shafts (magnetic levitation bearing), for the magnetooptic storage of information as well as for the magnetic marking of cells and their separation in biological samples or for the local administration of medicines.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: December 10, 2002
    Assignees: Studiengesellschaft Kohle mbH, Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Helmut Bönnemann, Werner Brijoux, Rainer Brinkmann, Michael Wagener
  • Methods for producing chiral aldehydes
    Patent number: 6399834
    Abstract: The present invention relates to methods for producing chiral aldehydes by the enantioselective hydroformylation of prochiral substrates with the aid of a catalyst consisting of a transition metal and a chiral ligand, characterized in that said chiral ligand is a compound of general formula 1 wherein the rings R7-R10 drawn with dotted lines are optional and one or more of rings R1-R6 or R7-R10 are substituted with one or more independently selected substituents of general formula —(CH2)x(CF2)yF(x=0-5; y=1-12) or their branched isomers. In particular, the invention relates to the conducting of the mentioned methods in compressed (liquid or supercritical) carbon dioxide as the reaction medium.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: June 4, 2002
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Walter Leitner, Sabine Kainz, Daniel Koch, Giancarlo Francio
  • Method for producing olefins
    Patent number: 6392111
    Abstract: Olefins containing aromatic substituents are synthesized without the addition of phosphonium salts or phosphanes with the aid of a PdII compound as a catalyst in the presence of nitrogen-containing additives such as N,N-dimethylglycine and a base.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: May 21, 2002
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Gunther Lohmer, Renate Lohmer, Elke Westermann
  • Hydroformylation with unmodified rhodium catalysts in supercritical carbon dioxide
    Patent number: 6388141
    Abstract: The present invention relates to processes for the preparation of oxo products by the hydroformylation of substrates having C═C double bonds using unmodified rhodium catalysts in a reaction mixture essentially consisting of the substrates, the catalyst and carbon dioxide in a supercritical state (scCO2). In particular, the invention relates to such processes for the preparation of products which contain substantial proportions of branched i-oxo products. Further, the invention relates to such processes for the hydroformylation of substrates which do not correspond to the general formula CnH2n. The invention further relates to such processes in which the separation of product and catalyst is effected using the special solvent properties of scCO2.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: May 14, 2002
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Walter Leitner, Daniel Koch
  • Selective olefin metathesis of bifunctional or polyfunctional substrates in compressed carbon dioxide as reaction medium
    Patent number: 6348551
    Abstract: Cyclic products are prepared by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or several homogeneous or heterogeneous metathesis catalysts in a reaction medium. The invention is characterized in that the substrates contain two or more functional groups in the form of substituted or non-substituted alkene or alkyne units and in that the reaction medium essentially consists of compressed carbon dioxide. Also disclosed is the preparation of cyclic or polymer products according to the disclosed process, the reaction temperature and total pressure being matched to ensure that the density of the reaction medium lies in a range d=0.2-1.5 g·cm−3 and that the product distribution is essentially controlled by the reaction medium density.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: February 19, 2002
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Alois Fürstner, Walter Leitner, Daniel Koch, Klaus Langemann, Christian Six
  • Microporous amorphous mixed metal oxides for form-selective catalysis
    Patent number: 6319876
    Abstract: The invention relates to the catalytic activity and selectivity of microporous, amorphous glasses of mixed metal oxides and the application thereof in the form of shape selective, heterogeneous catalysts. Microporous, amorphous mixed metal oxides (glasses) can be formed by polycondensation of soluble metal compounds. These new materials show a temperature stability up to 800° C. These amorphous glasses shown in heterocatalytic reactions selective oxidation, hydrogenation, hydrocracking and condensation catalysis.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: November 20, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventor: Wilhelm F. Maier
  • Process for the preparation of an olefin-substituted aromatic or heteroaromatic compound
    Patent number: 6316675
    Abstract: A process for the synthesis of olefins having aromatic substituents is described in which olefins are reacted with aryl halides in the presence of catalysts consisting of palladium compounds and tetraaryl phosphonium salts.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: November 13, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Gunther Lohmer, Renate Lohmer
  • Lithographical process for production of nanostructures on surfaces
    Patent number: 6309798
    Abstract: A lithographic method for the generation of nanostructures on surfaces, characterized in that either stabilized nanometer-sized transition metal clusters or colloids of metals of groups 4, 5, 6, 7, 8, 9, 10, 11 or 12 of the Periodic Table, their stabilized metal oxide or metal sulfide analogues, polynuclear metal carbonyl clusters having stoichiometrically defined compositions, or polynuclear metal clusters having stoichiometrically defined compositions or having bridges consisting of main group elements, respectively in the form of a solution, are coated on a surface as a film which is imagewise exposed with an electron beam, wherein defined structures in the nanometer range are generated on the surface after washing off the unexposed portions of the film, optionally followed by annealing.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: October 30, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Martin Winter, Günter Dumpich, Jens Lohau
  • Method for manufacturing transition-metal carbides, and their use as catalysts
    Patent number: 6303093
    Abstract: The present invention relates to a process for the preparation of transition metal carbides from transition metal/magnesium chlorides and perchlorinated organic compounds.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: October 16, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Borislav Bogdanović, Manfred Schwickardi
  • Microporous amorphous mixed metal oxides for shape selective catalysis
    Patent number: 6297180
    Abstract: The invention relates to the catalytic activity and selectivity of microporous, amorphous glasses of mixed metal oxides and the application thereof in the form of shape selective, heterogeneous catalysts. Microporous, amorphous mixed metal oxides (glasses) can be formed by polycondensation of soluble metal compounds. These new materials show a temperature stability up to 800° C. These amorphous glasses show in heterocatalytic reactions selective oxidation, hydrogenation, hydrocracking and condensation catalysis.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: October 2, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventor: Wilhelm F. Maier
  • Catalysts made from transition metal compounds and 4, 5-diphosphinoacridine-ligands
    Patent number: 6290926
    Abstract: The present invention relates to the preparation of novel catalysts made from transition metal compounds and “tridentate” 4,5-diphosphinoacridine ligands (“acriphos”). The novel ligands employed herein are diphosphine compounds of 4,5-disubstituted acridine which coordinate transition metals in a three-fold way with the two phosphorus atoms and the acridine nitrogen. The invention also relates to the use of the novel catalysts for the catalysis of carbon monoxide conversion via the water-gas shift reaction (WGSR: CO+H2O→CO2+H2) and for the catalysis of the following reactions: hydroformylation, carbonylation, carboxylation, hydrogenation, hydrocyanogenation, hydrosilylation, polymerization, isomerization, cross-couplings and metathesis.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: September 18, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Matthias W. Haenel, Stefan Hillebrand
  • Catalysts containing organochromium compounds and their use for polymerizing alkenes
    Patent number: 6255418
    Abstract: Novel donor ligand substituted &eegr;5-organyl chromium complexes which, in admixture with Lewis acids, such as methylaluminoxane, form highly active polymerization catalysts for &agr;-alkenes and mixtures thereof and for mixtures of &agr;-alkenes and unsaturated alkenes with a strained double bond.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: July 3, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Peter W. Jolly, Klaus Jonas, Glenn P. J. Verhovnik, Arno Döhring, Jan Göhre, Jan Christoph Weber
  • Process for preparing solvent-stabilized metal colloids and substrate-immobilized metal clusters
    Patent number: 6224739
    Abstract: Solvent-stabilized transition metal colloids are prepared either electrochemically by cathodically reducing metal salts in the presence of polar stabilizing solvents to form metal colloids, or the transition metal salts are reduced in polar solvents using an alcohol at elevated temperatures.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: May 1, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Manfred T. Reetz, Gunther Lohmer