Patents by Inventor Bernd Blumenberg

Bernd Blumenberg 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 the continuous preparation of organic mono-and/or polyisocyanates
    Patent number: 4581174
    Abstract: The invention relates to a process for the continuous preparation of organic isocyanates, preferably polyisocyanates, through the reaction of organic amines, preferably polyamines, with phosgene in the presence of organic solvents under pressure, for example from 5 to 100 bar, at elevated temperatures, for example from 100 to 220.degree. C., whereby the reaction mixture is partially recycled, preferably using natural circulation, and the hydrogen chloride content in the reaction mixture prior to the addition of the amine is less than 0.5 percent by weight based on the total weight of the reaction mixture and the molar ratio of phosgene to NH.sub.2 group in the organic amines is from 12:1 to 200:1.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: April 8, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Ohlinger, Harald Schnez, Ludwig Pfannenstiehl, Bernd Blumenberg, Hans J. Raabe
  • Separating toluene diisocyanate and/or higher boiling solvents from distillation residues of the toluene diisocyanate manufacture using a fluidized bed
    Patent number: 4289589
    Abstract: A process for separating toluene diisocyanate and/or higher boiling solvents from distillation residues obtained from the phosgenation of toluene diamine in the presence of solvents wherein the separation takes place in a fluidized bed at temperatures of 140.degree. C. to 280.degree. C.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: September 15, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Waldemar Koehler, Bernd Blumenberg, Ludwig Vogel, Eckhard Hetzel