Prepared By Addition Of Carbon Dioxide, Carbonic Acid, Or Salt Thereof To A Reaction Mixture Prior To Addition Of Sulfonic Acid Or Salt Thereof (i.e., Carbonating Reaction Mixture Prior To Addition Of Sulfonic Acid Or Salt Thereof) Patents (Class 508/395)
  • Engine wear protection in engines operated using ethanol-based fuel
    Patent number: 8198221
    Abstract: Lubricant formulations and methods for producing lubricant formulations are described that provide improved wear protection in engines operated using ethanol-based fuels. The improved wear protection may be provided by an increased amount of overbased calcium detergent present in the formulation.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: June 12, 2012
    Assignee: Afton Chemical Corporation
    Inventors: Gregory H. Guinther, Roger M. Sheets
  • Engine wear protection in engines operated using ethanol-based fuel
    Patent number: 7737094
    Abstract: Lubricant formulations and methods for producing lubricant formulations are described that provide improved wear protection in engines operated using ethanol-based fuels. The improved wear protection may be provided by an increased amount of overbased calcium detergent present in the formulation.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: June 15, 2010
    Assignee: Afton Chemical Corporation
    Inventors: Gregory H. Guinther, Roger M. Sheets
  • Method of improving the compatibility of an overbased detergent with other additives in a lubricating oil composition
    Patent number: 7691796
    Abstract: A method of improving the compatibility of an overbased detergent with other additives in a lubricating oil composition. The method includes the step of adding an oil-soluble, hydrocarbyl sulphonic acid to the detergent.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: April 6, 2010
    Assignee: Infineum International Limited
    Inventors: Christopher J. Adams, Peter J. Dowding
  • Low viscosity, chloride-free, low overbased alkyl-aryl-sulfonate, its application as an additive for lubricating oil, and methods of preparation
    Patent number: 6159912
    Abstract: A low overbased alkyl phenyl sulfonate prepared by the neutralization of sulfonic acid with a sulfurized high TBN calcium alkylphenate in the absence of chloride and in the absence of additional carboxylic acid.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: December 12, 2000
    Assignee: Chevron Chemical Company LLC
    Inventor: John McDonald