Mehra Patents (Class 62/938)
  • Patent number: 5687584
    Abstract: A retro fitted unit to an existing simple refrigerated natural gas plant that substantially increases the amounts of propane, butanes and natural gasoline, or ethane, propane, butanes and natural gasoline recovered from the natural gas in the existing gas treatment plant, wherein in one embodiment the existing natural gas treatment plant includes a refrigerated feed cooler, a separator and a stabilizer and the retrofitted unit comprises an NGL absorber, a refrigerated lean solvent cooler and a lean solvent regenerator; and wherein in a second embodiment the existing simple refrigerated gas treatment plant additionally includes an NGL fractionation train that separates the recovered NGL into saleable fractions and wherein the NGL fractionation train includes a debutanizer that produces all or part of the lean solvent utilized in the retrofitted unit which comprises an NGL absorber and a refrigerated solvent cooler; and wherein the natural gas treatment process utilizes a solvent that is pre-saturated with ligh
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: November 18, 1997
    Assignee: Advanced Extraction Technologies, Inc.
    Inventor: Yuv R. Mehra
  • Patent number: 5561988
    Abstract: A retrofitted unit to an existing simple refrigerated natural gas plant that substantially increases the amounts of propane, butanes and natural gasoline, or ethane, propane, butanes and natural gasoline recovered from the natural gas in the existing gas treatment plant, wherein in one embodiment the existing natural gas treatment plant includes a refrigerated feed cooler, a separator and a stabilizer and the retrofitted unit comprises an NGL absorber, a refrigerated lean solvent cooler and a lean solvent regenerator; and wherein in a second embodiment the existing simple refrigerated gas treatment plant additionally includes an NGL fractionation train that separates the recovered NGL into saleable fractions and wherein the NGL fractionation train includes a debutanizer that produces all or part of the lean solvent utilized in the retrofitted unit which comprises an NGL absorber and a refrigerated solvent cooler.
    Type: Grant
    Filed: October 27, 1995
    Date of Patent: October 8, 1996
    Assignee: Advanced Extraction Technologies, Inc.
    Inventor: Yuy R. Mehra
  • Patent number: 5546764
    Abstract: An absorption process for recovering hydrogen, ethylene, methane and heavy hydrocarbons from refinery and petrochemical off-gas streams wherein the absorption solvent is comprised of heavy hydrocarbons derived from the off-gas feed stream; no external solvent is used. The process comprises the steps of absorbing ethylene out of the feed off-gas in an absorber stripper using the absorption solvent, and fractionating the rich absorption solvent in a distillation column to produce an ethylene product stream as the overhead stream and the heavy hydrocarbon absorption solvent as the bottoms stream.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: August 20, 1996
    Assignee: Advanced Extraction Technologies, Inc.
    Inventor: Yuv R. Mehra