Patents by Inventor Bill Brady, Jr.

Bill Brady, Jr. 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 purification of toluene diisocyanate incorporating a dividing-wall distillation column for the final purification
    Patent number: 7108770
    Abstract: Toluene diisocyanate is recovered from a crude distillation feed containing less than 2% by weight of phosgene by (a) fractionating the crude distillation feed containing less than 2% by weight of phosgene to remove the solvent and optionally the reaction residues to produce a crude toluene diisocyanate feed containing less than 20% by weight of solvent and (b) separating the crude toluene diisocyanate feed containing less than 20% by weight of solvent in a divided-wall distillation column into four product fractions P1–P4. P1 is a vapor phase low-boiler and solvent-enriched gas stream, P2 is a low-boiler and solvent-enriched product, P3 is a high boiler-enriched bottoms product containing toluene diisocyanate and P4 is a toluene diisocyanate product stream lean in low-boilers, high-boilers and reaction residues.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: September 19, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Marcus Paul Grün, Bill Brady, Jr., Berthold Keggenhoff, Kai Verkerk, Hans-Peter Schal