Patents Assigned to Chevron Research & Technology
  • High purity benzene production using extractive distillation
    Patent number: 5401365
    Abstract: A process is provided for separating benzene from non-aromatics in a highly aromatic stream containing olefins in a concentration range of from about 0.05 to about 5.0, which process comprises predistilling said highly aromatic stream to produce a distilled fraction having a concentration of C.sub.8 and heavier compounds of less than about 0.1 wt percent; and extracting said distilled fraction with a solvent comprising substituted morpholines in an extractive distillation zone to produce a highly-pure benzene stream.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: March 28, 1995
    Assignee: Chevron Research & Technology
    Inventors: George T. Chen, Brenda M. Balaban, Gerd Emmrich, Bernhard Firnhaber