Patents by Inventor John R. Richmond

John R. Richmond 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).

  • Patent number: 6749821
    Abstract: A process for the purification of an inert gas recycled from a polymerization reactor is disclosed, comprising the steps of mixing the gas with oxygen or gas containing oxygen in stoichiometric quantity or in such an excess that the gas at the outlet of the catalyst bed contains no more than 250 ppm of oxygen, circulating the gas through a catalyst bed comprising platinum, which has been subjected to a reducing environment, at temperatures of no more than 300° C. (572° F.) and preferably no more than 250° C. (482° F.) and recycling the gas to the polymerization reactor.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: June 15, 2004
    Assignee: UOP LLC
    Inventors: James F. McGehee, John R. Richmond, Kaoru Tegawa, Yoshiki Nakano
  • Patent number: 5200162
    Abstract: The exothermicity attending decomposition of N.sub.2 O to nitrogen and oxygen can lead to a multiplicity of process difficulties associated with high process temperatures. An improved process is one where a portion of the exit gases, depleted in N.sub.2 O, is first cooled and then recycle to the N.sub.2 O-decomposition zone. The process is amenable to process control to afford a very stable process largely independent on the particular catalyst used for N.sub.2 O decomposition. Where the N.sub.2 O-containing waste gas stream also contains NO.sub.x, if it often highly desirable to pretreat the stream to remove NO.sub.x prior to the N.sub.2 O-decomposition zone.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: April 6, 1993
    Assignee: UOP
    Inventors: Brian W. Riley, John R. Richmond
  • Patent number: 5144094
    Abstract: A composite of tungsten oxide on alumina, zirconia, or titania is active in promoting the dehydration of phenols to afford diaryl ethers if the composite is partially reduced with hydrogen at a temperature between 250.degree. and 450.degree. C. Using such a catalyst diaryl ethers may be prepared by the dehydration of phenols in the temperature range of 350.degree. to 550.degree. C.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: September 1, 1992
    Assignee: UOP
    Inventors: John R. Richmond, Saad F. Tahir
  • Patent number: 4222853
    Abstract: The invention relates to anti-fouling agents capable of decreasing the fouling of equipment in contact with a hydrocarbon charge.These agents comprise at least one compound selected from the group consisting of substances having the formula: ##STR1## where R and R' are linear or branched alkyl radicals having between 4 and 12 carbon atoms and where M is a metal atom of Groups IA and IIA of the Periodic Table, withn=1, when the metal M is a metal of Group 1A, andn=2, when the metal M is a metal of Group IIA.An example of such an agent is sodium di-2-ethylhexylsulfosuccinate.
    Type: Grant
    Filed: March 28, 1979
    Date of Patent: September 16, 1980
    Assignees: Compagnie Francaise de Raffinage, Universal Matthey Products France
    Inventors: Claude Scherrer, Marc Durrieu, John R. Richmond