Patents by Inventor Paul E. Hajdu

Paul E. Hajdu 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).

  • COKE MORPHOLOGY BY IMAGE SEGMENTATION
    Publication number: 20220051393
    Abstract: The present invention is directed to a method for the prediction of coke morphology from feed characteristics using cross-polarized light optical microscopy, image segmentation, and statistical analysis.
    Type: Application
    Filed: July 26, 2021
    Publication date: February 17, 2022
    Inventors: Kaustav CHAUDHURI, Thomas M. REA, Estrella ROGEL, Cesar OVALLES, Paul E. HAJDU
  • Method for reducing mercaptans in hydrocarbons
    Patent number: 9296956
    Abstract: A method for reducing mercaptan concentration in a crude oil is disclosed. The method comprises contacting the crude with a treating solution comprising a hypochlorite solution, whereby the mercaptan sulfur is oxidized and converted to at least one sulfur oxoacid or salt thereof, yielding a treated crude oil having less than 50 ppm mercaptan sulfur and residual organic chloride. The treated crude oil containing residual organic chloride is brought in contact with a caustic solution at a molar ratio of caustic to chloride of 0.1:1 to 50:1, generating an upgraded crude oil with less than 10 ppm organic chloride. In one embodiment, the spent treating solution is recycled to form a regenerated hypochlorite stream for use in the treatment solution.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: March 29, 2016
    Assignee: Chevron U.S.A. Inc.
    Inventors: Lin Li, Zunqing He, Zhen Zhou, King T. Ng, Paul E. Hajdu
  • METHOD FOR REDUCING MERCAPTANS IN HYDROCARBONS
    Publication number: 20120103872
    Abstract: A method for reducing mercaptan concentration in a crude oil is disclosed. The method comprises contacting the crude with a treating solution comprising a hypochlorite solution, whereby the mercaptan sulfur is oxidized and converted to at least one sulfur oxoacid or salt thereof, yielding a treated crude oil having less than 50 ppm mercaptan sulfur and residual organic chloride. The treated crude oil containing residual organic chloride is brought in contact with a caustic solution at a molar ratio of caustic to chloride of 0.1:1 to 50:1, generating an upgraded crude oil with less than 10 ppm organic chloride. In one embodiment, the spent treating solution is recycled to form a regenerated hypochlorite stream for use in the treatment solution.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 3, 2012
    Inventors: Lin Li, Zunqing He, Zhen Zhou, King T. Ng, Paul E. Hajdu