Patents by Inventor John R. Coleman, Jr.

John R. Coleman, Jr. 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).

  • Process for the production of petroleum sulfonate
    Patent number: 3956372
    Abstract: Petroleum sulfonates useful to impart micellar characteristics to mixtures of hydrocarbon and aqueous medium are obtained by reacting a hydrocarbon gas oil feedstock (average molecular weight 250-700; A/AP aliphatic to aromatic proton) ratio 5-50 moles/mole, 30-100% of the feedstock molecules contain aromatic portions and the A/AP ratio of the aromatic portion being about 3-20 moles/mole) with a solution of EDC (ethylene dichloride) containing 0.1-0.3 lb. liquid SO.sub.3 /lb EDC. The SO.sub.3 concentration is about 0.1-0.3 lb. of SO.sub.3 /lb of gas oil feedstock. Reaction takes place in a back-mix tubular reactor wherein at least about 4 parts of reaction products are recycled per 1 part of reaction products withdrawn and wherein the gas oil feedstock plus recycled reaction products and the SO.sub.3 /EDC streams entering the reaction zone are in turbulent flow. Velocity ratio of the feedstock plus recycled reaction products stream to the SO.sub.3 /EDC stream is at least 4:1, respectively.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: May 11, 1976
    Assignee: Marathon Oil Company
    Inventors: John R. Coleman, Jr., Mark A. Plummer, Carle C. Zimmerman, Jr., Henry J. Pietrzak, Wayne E. Luetzelschwab, Kent W. Robinson, Donald E. Schroeder, Jr.