Patents by Inventor Nicolaas L. G. Duys

Nicolaas L. G. Duys 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 preparation of pyridine and 2,6-lutidine
    Patent number: 4189585
    Abstract: A process for preparing pyridine with 2,6 lutidine as by-product, by catalytic demethylation of .alpha.-picoline in the gaseous phase with steam is disclosed wherein the demethylation step is conducted at a temperature of 250.degree.-360.degree. C. using a metallic hydrogenation catalyst at a contact time of about 0.5 to 15 seconds. Pyridine is a known important organic base with many uses, such as denaturant for alcohols and solvent in the rubber and paint industries.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: February 19, 1980
    Assignee: Stamicarbon, B.V.
    Inventors: Egidius J. M. Verheijen, Nicolaas L. G. Duys