Patents Assigned to Exxon Reseach & Engineering Company
  • Patent number: 5626742
    Abstract: The present invention relates to a continuous in-situ process for the removal of organically bound sulfur existing as mercaptans, sulfides and thiophenes comprising the steps of (a) contacting a heavy oil with aqueous sodium hydroxide at a temperature of about 380.degree. C. to about 450.degree. C. for a time sufficient to form sodium sulfide, and (b) steam stripping the sodium sulfide of step (a) at a temperature sufficient to convert said sodium sulfide to sodium hydroxide and recirculating the sodium hydroxide from step (b) back to step (a) and removing hydrogen sulfide and the metals from the organically bound metal complex of the sodium sulfide to convert it back to sodium hydroxide, in which case the sulfur may be recovered as H.sub.2 S rather than the metal sulfide. Optionally, molecular hydrogen may be added in the first step. The present invention is useful in removing organically bound sulfur that has been recognized to be difficult to remove, such as thiophenes.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: May 6, 1997
    Assignee: Exxon Reseach & Engineering Company
    Inventors: Glen Brons, Ronald D. Myers
  • Patent number: H363
    Abstract: A method for improving the antimisting properties of an organic liquid which comprises the step of dissolving about 0.1 to about 3.0 weight percent of a neutralized sulfonated polymer in such organic liquid, having a solubility parameter of less than 9, wherein said neutralized sulfonated polymer has about 5 to about 200 meq. of pendant sulfonate groups per 100 grams of polymer and about 90.0 to 100% of said sulfonate groups are neutralized, wherein the solution of the organic liquid and the neutralized sulfonated polymer has an approximate polymer concentration, C.sub.A, which can be characterized by the formula: ##EQU1## wherein [.eta.] is the intrinsic viscosity of said solution and the polymer concentration range is 0.1 times to 10 times C.sub.A.
    Type: Grant
    Filed: December 12, 1985
    Date of Patent: November 3, 1987
    Assignee: Exxon Reseach and Engineering Company
    Inventors: Ilan Duvdevani, Robert D. Lundberg