Patents by Inventor Dirk Bonse

Dirk Bonse 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: 5662809
    Abstract: In a process for the catalytic treatment of aqueous liquids containing germs, for example, for the catalytic removal of oxygen, nitrite or nitrate in drinking, culinary or waste water, the germ contamination of a catalysts which are used can be prevented when the process is carried out in the fluidized bed.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: September 2, 1997
    Assignee: Solvay Umweltchemie GmbH
    Inventors: Michael Bischoff, Dirk Bonse, Michael Sell
  • Patent number: 5518979
    Abstract: The description relates to a particularly abrasion-resistant catalyst carrier of special activated aluminum oxide. The aluminum oxide consists of either the "gamma" or the "kappa" modification and has no "delta" modification, or it consists of the "kappa" and "theta" modifications and has no "alpha" modification. Carrier catalysts which contain catalytically active metals and/or metal compounds on the abrasion-resistant carrier are especially suitable for use in fluidized bed processes.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: May 21, 1996
    Assignee: Solvay Umweltchemie GmbH
    Inventors: Dirk Bonse, Karl-Heinz Bretz, Helmut Derleth, Michael Sell
  • Patent number: 5507956
    Abstract: The description relates to an abrasion-resistant carrier catalyst for removing the nitrite and/or nitrate content of polluted water with selective nitrogen formation. The catalytically active metal component is palladium and/or rhodium or palladium and a metal from the copper group. The carrier consists of aluminum oxide in the "theta" and "kappa" modification and has either one maximum pore diameter in the 70 to 150 nm (700 to 1500 .ANG.) range or two maxima in the 10 to 150 nm (100 to 1500 .ANG.) range. The description also relates to a continuously operable process for the removal or reduction of the oxygen, nitrite and/or nitrate content of water by catalytic hydrogenation. The process is implemented using the novel carrier catalysts, the carriers being made of aluminum oxide of the theta and kappa modifications. Contamination of the catalyst is effectively prevented by the preferred use according to the fluidized bed process.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: April 16, 1996
    Assignee: Solvay Unweltchemie GmbH
    Inventors: Dirk Bonse, Karl-Heinz Bretz, Helmut Derleth, Michael Sell, Michael Bischoff
  • Patent number: 5229284
    Abstract: Enzymes are immboilized on an inorganic carrier which is a round, macropermeable agglomerate having a mulberry-type structure formed from spherical microporous .alpha.-aluminum oxide hydroxide particles. An organic polycondensate having free organic functional groups as enzyme binding sites penetrates the agglomerate. The .alpha.-aluminum oxide hydroxide particles of the agglomerate retain essentially their form prior to agglomeration. The polycondensate is prepared by reacting a polyimine with a dialdehyde or an epoxy compound. Preferably, the polyimine is polyethyleneimine, the dialdehyde is glutardialdehyde and the epoxy compound is an epoxy-functional silicon resin, an aliphatic diepoxide or an aliphatic triepoxide. The agglomerate is prepared by granulating the .alpha.-aluminum oxide hydroxide particles in the presence of the polyimine to form the agglomerate having the polyimine dispersed throughout and then reacting the polyimine with the dialdehyde or the epoxy compound.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: July 20, 1993
    Assignee: Kali Chemie AG
    Inventors: Dirk Bonse, Hubert Schindler, Hans-Joerg Mueller
  • Patent number: 4665025
    Abstract: Disclosed is a process for the preparation of a solution containing glucose and fructose (isoglucose) by the conversion of a glucose-containing solution on a catalyst having glucose isomerase activity and produced on the basis of a SiO.sub.2 carrier. The productivity of the catalyst may be significantly increased by the addition of SiO.sub.2 to the glucose solution, and the catalyst according to the present invention is not damaged by temporary process shutdowns.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: May 12, 1987
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Guenter Weidenbach, Dirk Bonse, Boris Meyer
  • Patent number: 4533633
    Abstract: When isomerizing part of the glucose content of a glucose-containing solution to fructose, the productivity of glucose isomerase immobilized on an SiO.sub.2 carrier is increased considerably by pre-contacting the glucose-containing solution with particles of SiO.sub.2 or aluminum silicate. An apparatus is used having a reaction vessel containing the immobilized glucose isomerase and a pre-column containing the particles of SiO.sub.2 or aluminum silicate.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: August 6, 1985
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Gunter Weidenbach, Dirk Bonse, Boris Meyer
  • Patent number: 4230803
    Abstract: Enzymes are covalently bonded to porous inorganic supports by a process wherein maximum activity of enzyme in the water-insoluble enzyme composition is achieved with the lowest possible amount of enzyme. The process involves selecting an inorganic carrier having a most frequent pore-diameter that results in highest enzymatic activity possible per weight unit of the insoluble enzyme composition at the given enzyme concentration within the insoluble enzyme composition, and contacting the selected inorganic carrier with an enzyme solution containing an amount of enzyme which is sufficiently low so that the enzyme in the insoluble enzyme composition has a specific activity which is substantially the same as that of the enzyme in solution in the free state.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: October 28, 1980
    Assignee: Kali-Chemie Aktiengesellschaft
    Inventors: Guenter Weidenbach, Dirk Bonse