Patents by Inventor Velliyur Nott M. Rao

Velliyur Nott M. Rao 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).

  • Production of formaldehyde
    Patent number: 4474996
    Abstract: Methanol is converted to formaldehyde by oxidative dehydrogenation using as catalyst sputtered or ion plated silver or silver/gold alloy on an inert hard, nonporous support.
    Type: Grant
    Filed: March 14, 1983
    Date of Patent: October 2, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter F. Carcia, Velliyur Nott M. Rao
  • Production of formaldehyde
    Patent number: 4439625
    Abstract: A process for converting methanol to formaldehyde at 450.degree. to 750.degree. C. using as catalyst silver, silver-gold alloys or copper-gold alloys in which from 0.001 to 15 parts per million, based on methanol, of phosphorus or phosphorus from a phosphorus compound is present.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: March 27, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Velliyur Nott M. Rao
  • Oxidation catalyst
    Patent number: 4429055
    Abstract: An oxidation catalyst comprising boron phosphate impregnated with from 5 to 20 weight percent silver and its use to oxidize propylene, butene-1, butadiene-1,3 and methanol is disclosed. The oxidation takes place at from 200.degree. to 700.degree. C. Preferably water vapor is present.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: January 31, 1984
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Velliyur Nott M. Rao