Patents by Inventor Sigurd Hartung

Sigurd Hartung 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 removing metal halides from liquid organic water-immiscible substances
    Patent number: 4885418
    Abstract: According to the invention, metal halides are removed from liquid organic water-immiscible substances by treating the liquid organic water-immiscible substances which contain the metal halides with a water-containing anion-exchanger in the OH form.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: December 5, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Sigurd Hartung, deceased, by Birgit Hartung-Merse, heir, Uwe Beck, Ulrich Kappler, Alfred Mitschker, Andreas Grafe
  • Process for the removal of m-dichlorobenzene from dichlorobenzene mixtures
    Patent number: 4748287
    Abstract: The invention relates to a process for the removal of m-dichlorobenzene from dichlorobenzene mixtures by chlorination in the liquid phase at elevated temperature in the presence of Friedel-Crafts catalysts, the chlorination being carried out with addition of sulphur, sulphur compounds, iodine and/or iodine compounds and the chlorination mixture then being worked up in the usual way.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: May 31, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kai Rohlk, Sigurd Hartung
  • Process for the preparation of trichlorobenzenes
    Patent number: 4570023
    Abstract: A process for the preparation of a trichlorobenzene by chlorination of o-dichlorobenzene in the presence of a catalyst is disclosed. The catalyst comprises aluminum chloride. Preferably an iron or iron chloride containing aluminum chloride catalyst is employed.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: February 11, 1986
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerd-Michael Petruck, Raimund Wambach, Adolf Wissner, Sigurd Hartung
  • Separation process
    Patent number: 4254062
    Abstract: A process for the separation of isomeric dichlorotoluenes is described wherein an isomeric mixture of dichlorotoluenes is passed over a zeolite of the X or Y type, non-adsorbed dichlorotoluene is separated off and the adsorbed dichlorotoluene is eluted from the zeolite by contacting the same with an eluant.
    Type: Grant
    Filed: January 10, 1979
    Date of Patent: March 3, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Raimund Wambach, Sigurd Hartung, Gerhard Reiss, Lothar Puppe
  • Process for the preparation of unsaturated amino compounds
    Patent number: 4002673
    Abstract: Process for the preparation of aromatic amines which additionally still contain C-C multiple bonds, characterized in that aromatic nitro compounds which still contain C-C multiple bonds are hydrogenated in the presence of metal sulphides of the formula MeS.sub.x in which x is a number from 1 to 4 and Me represents a metal atom of the group consisting of iron, nickel, ruthenium, rhodium, palladium, rhenium, osmium, iridium and platinum as catalysts, at 20.degree. to 140.degree. C and at 5 to 150 bars hydrogen pressure.
    Type: Grant
    Filed: December 12, 1974
    Date of Patent: January 11, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rudolf Braden, Hans Knupfer, Sigurd Hartung