Patents by Inventor K. N. Srinivas Prabhu

K. N. Srinivas Prabhu 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 solvent extraction of aromatics and the recovery of an aromatics-free non-aromatic product from a hydrocarbon feedstock
    Patent number: 4353794
    Abstract: A process for the solvent extraction of aromatic hydrocarbons from a mixture thereof with non-aromatic hydrocarbons, and for the recovery of a non-aromatic fraction substantially free of aromatic hydrocarbons, is disclosed. Said mixture is treated with an aromatic-selective solvent in a first extraction zone to provide an aromatic-rich solvent stream and a non-aromatic raffinate stream. The rich solvent stream is treated in a first solvent recovery zone to provide a high purity aromatic stream and a lean solvent stream. One portion of the lean solvent stream is recycled to the first extraction zone, and residual aromatic hydrocarbons are stripped from the remaining portion. This aromatics-free solvent is then utilized to extract residual aromatics from a fraction of the non-aromatic raffinate to provide a high purity paraffin stream.
    Type: Grant
    Filed: November 26, 1980
    Date of Patent: October 12, 1982
    Assignee: UOP Inc.
    Inventors: George R. Winter, III, William H. Maier, K. N. Srinivas Prabhu