Patents by Inventor Wolfgang Schröder

Wolfgang Schröder 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: 5002922
    Abstract: Catalysts whose active material contains, in addition to from 20 to 85% by weight, calculated as ZrO.sub.2, of oxygen-containing zirconium compounds, from 1 to 30% by weight, calculated as CuO, of oxygen-containing compounds of copper and from 1 to 40% by weight each, calculated as CoO or NiO, respectively, of oxygen-containing compounds of cobalt and of nickel are used for the amination of alcohols under hydrogenating conditions.
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: March 26, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Irgang, Juergen Schossig, Wolfgang Schroeder, Siegfried Winderl
  • Patent number: 4881869
    Abstract: In a throat stopper for shaft furnaces, in particular blast furnaces with two hoppers of which an upper hopper is rotatable through a drive device, the upper hopper is designed, by a stationary hood equipped with charging flap valves, as a sluice chamber to be closed pressureproof. For sealing the stationary hood relative to the rotatable upper hopper, there is disposed, at the hood, a peripheral flexible inflatable bellows. The bellows can be pressed against the wall of the upper hopper pneumatically or hydraulically. While material is being charged in the upper hopper, one of the charging valves is open and the bellows is pressureless. During, or shortly after, the charging, the uppr hopper is rotated. For filling the lower hopper, the valves of the upper hopper are closed, bellows is inflated, and the upper sluice chamber is pressurized.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: November 21, 1989
    Assignee: Man Gutehoffnungshuette GmbH
    Inventors: Bernhard Henneken, Burno Kammerling, Eckhard-K. Scholz, Wolfgang Schroeder, Hans Krause
  • Patent number: 4845218
    Abstract: A process for the preparation of N-methylpiperazine from diethanolamine and methylamine, wherein the reaction is carried out at elevated temperature and superatmospheric pressure in the presence of hydrogen over a metal-containing catalyst.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: July 4, 1989
    Assignee: BASF Aktiengesellschaft
    Inventor: Wolfgang Schroeder
  • Patent number: 4786727
    Abstract: Hexamethylenemine is obtained by hydrogenating .epsilon.-caprolactam, the latter being vaporized and hydrogenated under a working pressure of less than 10 bar, the gas phase being unsaturated in respect of caprolactam, and the residence time being short.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: November 22, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schroeder, Wolfgang Franzischka, Herbert Mueller
  • Patent number: 4778276
    Abstract: A device for continuously preparing a hydraulically setting mass comprises a tubular housing having a downstream outlet opening and an upstream supply station for a dry component material of the mass, the supply station including a storage bin for the dry material. A driven rotating shaft extends from the storage bin through the tubular housing towards the outlet opening, rotation of the shaft causing a feed flow in the direction of the outlet opening, and the rotating shaft is equipped with a dosing screw feeding the dry material out of the storage bin, a plurality of radially projecting mixing blades for mixing the material fed by the dosing screw, and an implement for finely granulating the mixed material downstream of the mixing blades, the granulating implement being comprised of at least two interdigitating comb-like elements, one of the comb-like elements being carried by the shaft for rotation therewith and another comb-like element being affixed to the tubular housing.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: October 18, 1988
    Assignee: Heidelberger Zement Aktiengesellschaft
    Inventors: Adolf Meyer, Helmut Steinegger, Wolfgang Schroeder
  • Patent number: 4739051
    Abstract: Morpholine and other cyclic imines are obtained by reacting diethylene glycol and other appropriate diols with ammonia under hydrogenating conditions in the gas phase in the presence of a catalyst which contains copper, a smaller amount of nickel and alumina.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: April 19, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schroeder, Wolfgang Lengsfeld, Gerd Heilen, Otto Hertel, Guenter Boettger
  • Patent number: 4714527
    Abstract: In a process for measuring the potential difference between a flow of sample liquid delivered by pumping and a reference electrolyte in which the sample flow is brought into contact with a reference electrode, the reference electrode contains a capillary channel, which extends substantially at right angles to the sample flow. The reference electrolyte is pumped at right angles to the capillary channel over its open end and the pumping of the flow of sample liquid and the flow of reference electrolyte starts and finishes simultaneously.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: December 22, 1987
    Assignee: Eppendorf Geratebau Netheler + Hinz GmbH
    Inventors: Gerhard Hofmeier, Karl Petersen, Wolfgang Schroeder
  • Patent number: 4386219
    Abstract: Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts.The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: May 31, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Ernest Miesen, Franz J. Broecker, Wolfgang Schroeder, Karl Baer, Juergen Paetsch, Leopold Hupfer
  • Patent number: 4386018
    Abstract: Hydrogenation catalysts, which have a specific surface area of from 50 to 150 square meters per gram, solely or partially contain crystals having a spinel structure and copper in the form of copper oxide, and have been obtained by precipitating copper and aluminum in a ratio of from 0.25 to 3 atoms of copper per atom of aluminum from their compounds in the presence of a carbonate at a pH of from 4.5 to 9 and calcining the resulting precipitate at from 300.degree. to 800.degree. C., for the catalytic preparation of propanediols by hydrogenating hydroxypropionaldehydes at not more than 300 bar pressure and from 50.degree. to 200.degree. C., and processes for the preparation of propanediols by the use of such catalysts.The propanediols obtainable by the process of the invention, in particular 2,2-dimethylpropane-1,3-diol, are valuable starting materials for the preparation of lubricants, plastics, surface coatings and synthetic resins, for example corresponding polyesters.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: May 31, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Merger, Ernest Miesen, Franz J. Broecker, Wolfgang Schroeder, Karl Baer, Juergen Paetsch, Leopold Hupfer
  • Patent number: 4384147
    Abstract: A process for the preparation of a hydrogenation catalyst which contains the oxides of the metals nickel, copper, molybdenum and aluminum and/or iron, and may or may not contain manganese oxide, by precipitating a solution of salts of the metals with an alkali metal carbonate at from 35.degree. to 95.degree. C. and a pH of from 5 to 9 and heating the precipitate at from 350.degree. to 700.degree. C., the amount of the metal salts being selected so that the catalyst contains from 5 to 70 percent by weight of aluminum oxide and/or iron oxide, the remainder being principally nickel oxide and, based on nickel oxide, from 20 to 40 percent by weight of copper oxide, from 0.5 to 6 percent by weight of molybdenum oxide and from 0 to 10 percent by weight of manganese oxide.
    Type: Grant
    Filed: January 28, 1981
    Date of Patent: May 17, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Baer, Wolfgang Reiss, Wolfgang Schroeder, Dieter Voges
  • Patent number: 4287099
    Abstract: A process for the preparation of a hydrogenation catalyst which contains the oxides of the metals nickel, copper, molybdenum and aluminum and/or iron, and may or may not contain manganese oxide, by precipitating a solution of salts of the metals with an alkali metal carbonate at from 35.degree. to 95.degree. C. and a pH of from 5 to 9 and heating the precipitate at from 350.degree. to 700.degree. C., the amount of the metal salts being selected so that the catalyst contains from 5 to 70 percent by weight of aluminum oxide and/or iron oxide, the remainder being principally nickel oxide and, based on nickel oxide, from 20 to 40 percent by weight of copper oxide, from 0.5 to 6 percent by weight of molybdenum oxide and from 0 to 10 percent by weight of manganese oxide.
    Type: Grant
    Filed: April 24, 1980
    Date of Patent: September 1, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Karl Baer, Wolfgang Reiss, Wolfgang Schroeder, Dieter Voges
  • Patent number: 4234727
    Abstract: Amines are N-alkylated by reaction with an alcohol or a carbonyl compound in the presence of hydrogen under atmospheric pressure in the gas phase over a catalyst, containing copper and aluminum, which is obtained by heating and reducing a basic precipitate of salts of copper and aluminum.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: November 18, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Herbert Toussaint, Wolfgang Schroeder, Wolfgang Franzischka
  • Patent number: 4184982
    Abstract: A hydrogenation catalyst containing copper, nickel or cobalt as the active metal is obtained by precipitating the metal salt solution with an alkali metal silicate solution containing excess alkali, and drying and reducing the resulting precipitate.
    Type: Grant
    Filed: June 13, 1978
    Date of Patent: January 22, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Schroeder, Wolfgang Franzischka
  • Patent number: 4067914
    Abstract: In a process for the manufacture of butynediol by the reaction of formaldehyde and acetylene in aqueous solution, in which a catalyst is used which is produced by the action of acetylene and formaldehyde on copper (II) compounds, the catalyst becomes inactive when it is treated for a relatively long period with formaldehyde at elevated temperature in the absence of acetylene so that it must constantly remain in contact with acetylene-containing solution if its temperature is above 70.degree. C.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: January 10, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Reiss, Siegfried Winderl, Wolfgang Schroeder, Herwig Hoffmann
  • Patent number: 4062899
    Abstract: Basic carbonate which contains copper and aluminum and is suitable for the manufacture of copper-containing catalysts and which has the general formula Cu.sub.m Al.sub.6 (CO.sub.3).sub.0.5m O.sub.3 (OH).sub.m+12, where m may be an integer or non-integer between 2 and 6.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: December 13, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Rudolf Laurer, Wolfgang Schroeder, Herwig Hoffmann, Heinz Lingk
  • Patent number: 4054372
    Abstract: A varifocal objective with a four-component front lens group, including axially shiftable second and third components, is provided with a focusing mechanism for the joint displacement of these second and third components as well as a further lens member relatively to the axially fixed first component, that further lens member being either the fourth component of the front lens group or part of an otherwise fixed rear lens group. In the case of an afocal front lens group the last three components thereof are displaced in unison by the focusing mechanism. The lens shifts can be co-ordinated by electric servomotors under the control of stored data.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: October 18, 1977
    Assignee: Jos. Schneider & Co. Optische Werke Kreuznach
    Inventor: Wolfgang Schroeder
  • Patent number: 4009124
    Abstract: Basic carbonate which contains copper and aluminum and is suitable for the manufacture of copper-containing catalysts and which has the general formula Cu.sub.m Al.sub.6 (CO.sub.3).sub.0.5m O.sub.3 (OH).sub.m.sub.+12, where m may be an integer or non-integer between 2 and 6.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: February 22, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Rudolf Laurer, Wolfgang Schroeder, Herwig Hoffmann, Heinz Lingk
  • Patent number: 3954669
    Abstract: A new catalyst for the manufacture of butynediol from formaldehyde and acetylene, based on a carbonate which contains copper, has the structure of the natural mineral manasseite, also contains magnesium or aluminum or -- in place of aluminum -- iron or chromium and is converted into the catalyst by reaction of the copper ions with acetylene.
    Type: Grant
    Filed: November 19, 1974
    Date of Patent: May 4, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Josef Broecker, Wolfgang Reiss, Karl Baer, Siegfried Winderl, Wolfgang Schroeder, Herwig Hoffmann