Patents by Inventor Jost H. Manegold

Jost H. Manegold 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).

  • Workup of mother liquors resulting from the preparation of adipic acid
    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
  • Preparation of aliphatic dinitriles
    Patent number: 4743702
    Abstract: Aliphatic dinitriles are prepared by reacting aliphatic dicarboxylic acids with ammonia in excess at from 200.degree. to 500.degree. C. in the presence of zeolites as catalysts.
    Type: Grant
    Filed: March 13, 1986
    Date of Patent: May 10, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Hoelderich, Hubert Lendle, Peter Magnussen, Hans Leitner, Jost H. Manegold, Wolfgang Leitenberger
  • Preparation of adipodinitrile
    Patent number: 4599202
    Abstract: Adipodinitrile is prepared by reacting adipic acid with excess ammonia at from 250.degree. to 350.degree. C. in the liquid phase in the presence of a diluent by a process in which a liquid hydrocarbon which is inert under the reaction conditions is used as the diluent.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: July 8, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Toni Dockner, Manfred Sauerwald, Jost H. Manegold, Hans Leitner