Patents by Inventor Elzie D. Black

Elzie D. Black 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).

  • Method of preparing overbased calcium sulfonates
    Patent number: 5132033
    Abstract: Lubricating oils contain an overbased oil-soluble composition prepared by adding water to a heated reaction mixture containing an alkaline earth metal halide, an alkaline earth metal salt of an alkaryl sulfonate, a hydrocarbon diluent-solvent, a lower alkanol, and an alkali metal oxide, and thereafter passing carbon dioxide through the reaction mixture.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: July 21, 1992
    Assignee: Texaco Inc.
    Inventors: Tze C. Jao, Jayne M. Vaccaro, Elzie D. Black
  • Process for overbasing sulfonates comprising two separate additions of calcium oxide
    Patent number: 5108630
    Abstract: In an overbased sulfonate process calcium hydroxide is formed in situ. The entire water charge and 30 to 50% of the calcium oxide is added. The temperature exotherm is observed. When the temperature ceases to rise, the remaining calcium hydroxide is added with temperature adjustment and carbonation is begun.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: April 28, 1992
    Assignee: Texaco Inc.
    Inventors: Elzie D. Black, Leonard A. Matthews, William J. Powers, III, Robert W. Erickson, Jr.
  • Process for the preparation of sulfurized overbased phenate detergents
    Patent number: 4973411
    Abstract: An improved process for the preparation of sulfurized overbased alkaline earth metal phenates comprises steps of:(a) sulfurizing an alkylphenol with a sulfur halide in an alkane solvent;(b) neutralizing the sulfurized alkylphenol with an alkaline earth metal compound in a mixed solvent comprising an alkane and a lower alkanol to produce a sulfurized alkaline earth metal phenate;(c) carbonating said phenate with carbon dioxide to produce an overbased phenate; and(d) filtering and solvent stripping the reaction mixture to recover the phenate product.The products have a high degree of sulfurization with a substantial portion of monosulfide bonds and are substantially free from alkylene oxide residues.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: November 27, 1990
    Assignee: Texaco Inc.
    Inventors: Tze C. Jao, Carl K. Esche, Elzie D. Black, Robert H. Jenkins, Jr.