Patents by Inventor Nicolaus Bahr

Nicolaus Bahr 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).

  • Method for the production of tetrahydrogeranylacetone
    Patent number: 7411098
    Abstract: The present invention relates to a process for preparing tetrahydrogeranylacetone (tetrahydropseudoionone) by aldol condensation of citral with acetone and subsequent hydrogenation. The invention further relates to the use of thus obtained tetrahydro-geranylacetone for preparing phytol, isophytol, tocopherol and/or tocopherol derivatives. In addition, the invention relates to processes for preparing tocopherols and/or tocopherol derivatives.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: August 12, 2008
    Assignee: BASF SE
    Inventors: Walter Dobler, Nicolaus Bahr, Alois Kindler, Christian Miller, Axel Salden
  • Method for the production of tetrahydrogeranylacetone
    Publication number: 20070167655
    Abstract: The present invention relates to a process for preparing tetrahydrogeranylacetone (tetrahydropseudoionone) by aldol condensation of citral with acetone and subsequent hydrogenation. The invention further relates to the use of thus obtained tetrahydro-geranylacetone for preparing phytol, isophytol, tocopherol and/or tocopherol derivatives. In addition, the invention relates to processes for preparing tocopherols and/or tocopherol derivatives.
    Type: Application
    Filed: December 10, 2004
    Publication date: July 19, 2007
    Applicant: BASF Aktiengesellschaft
    Inventors: Walter Dobler, Nicolaus Bahr, Alois Kindler, Christian Miller, Axel Salden
  • Continuous process for producing pseudoionones and ionones
    Patent number: 7141698
    Abstract: The invention relates to a continuous process for producing pseudoionones of general formulas (I) and (I?) as well as isomers thereof, whereby: R1 represents CH3 or (a); R2 and R3 represent hydrogen, CH3 or C2H5, and; R4 and R5 represent hydrogen or CH3. These pseudoionones are produced by reacting an aldehyde of formula (II) with an excess of a ketone of general formula (III), whereby R1, R2 and R3 have the aforementioned meanings, in the presence of water and alkali hydroxide at an increased temperature and in a homogeneous solution. The inventive process is characterized in that: a) the intermixing of the homogeneous solution consisting of aldehyde, ketone and aqueous alkali lye occurs at a temperature ranging from 10 to 120° C.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: November 28, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Dobler, Nicolaus Bahr, Klaus Breuer, Alois Kindler
  • Continuous process for producing pseudoinones and ionones
    Publication number: 20060014984
    Abstract: The invention relates to a continuous process for producing pseudoionones of general formulas (I) and (I?) as well as isomers thereof, whereby: R1 represents CH3 or (a); R2 and R3 represent hydrogen, CH3 or C2H5, and; R4 and R5 represent hydrogen or CH3. These pseudoionones are produced by reacting an aldehyde of formula (II) with an excess of a ketone of general formula (III), whereby R1, R2 and R3 have the aforementioned meanings, in the presence of water and alkali hydroxide at an increased temperature and in a homogeneous solution. The inventive process is characterized in that: a) the intermixing of the homogeneous solution consisting of aldehyde, ketone and aqueous alkali lye occurs at a temperature ranging from 10 to 120° C.
    Type: Application
    Filed: October 28, 2003
    Publication date: January 19, 2006
    Applicant: BASF Aktiengesellschaft
    Inventors: Walter Dobler, Nicolaus Bahr, Klaus Breuer, Alois Kindler