Patents by Inventor Ciriaco D. Arribas

Ciriaco D. Arribas 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 production of isocyanates and for working up the residue
    Patent number: 5354432
    Abstract: A process for the production of pure distilled isocyanates in which the corresponding amine is reacted with phosgene in a suitable solvent and working up of the isocyanate containing solution obtained by multistage distillation into pure isocyanate, pure solvent and a residue. The residue is then charged to a vessel containing at least one hydrocarbon having a high boiling point. The contents of this vessel are then heated with stirring to distill off any free isocyanate present. The remaining residue is a solid which may be disposed of readily.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: October 11, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Javier C. Arribas, Ciriaco D. Arribas, Salvador V. Rodriguez