With Plural Separation Procedures Patents (Class 585/423)
  • Patent number: 6005152
    Abstract: A process is described for preparing monoalkylated aromatic compounds which comprises subjecting an aromatic hydrocarbon to alkylation with an olefin containing from 2 to 4 carbon atoms, or to transalkylation with a polyalkylaromatic hydrocarbon, in the presence of ERS-10 zeolite.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: December 21, 1999
    Assignees: Enichem S.p.A., EniTechnologie S.p.A.
    Inventors: Stefano Amarilli, Luciano Carluccio, Carlo Perego, Giuseppe Bellussi
  • Patent number: 4528412
    Abstract: A hydrocarbon conversion process for the production of C.sub.6 -C.sub.8 aromatic hydrocarbons from C.sub.3 and C.sub.4 aliphatic hydrocarbons is disclosed. This dehydrocyclodimerization process is characterized by the integrated product recovery steps employed to separate hydrogen and products from the reactor effluent. Following partial condensation of the reactor effluent stream, the resultant vapor is subjected to liquid absorption (scrubbing) followed by autorefrigeration to yield lighter gas streams. Liquids from the various steps are separated via fractionation.
    Type: Grant
    Filed: October 11, 1984
    Date of Patent: July 9, 1985
    Assignee: UOP Inc.
    Inventor: Paul C. Steacy
  • Patent number: 4511747
    Abstract: In the conversion of light olefins to heavier hydrocarbons, an improved recovery technique is provided for selectively removing unreacted light olefins from a catalytic reactor effluent. This system is useful in converting ethene-rich feedstocks to gasoline and/or distillate products, particularly in oligomerization processes employing shape selective siliceous catalysts such as ZSM-5 type zeolites. By recycling gasoline-range hydrocarbons as a sorbent liquid, unreacted C.sub.2.sup.+ components may be absorbed from reactor effluent vapor and returned for further contact with the catalyst.
    Type: Grant
    Filed: February 1, 1984
    Date of Patent: April 16, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Bernard S. Wright, Chung H. Hsia, Hartley Owen
  • Patent number: 4450311
    Abstract: A heat balanced technique for converting an olefinic feedstock comprising ethylene and C.sub.3.sup.+ olefins to heavier liquid hydrocarbon product in a catalytic exothermic process. Methods and means are provided for prefractionating the olefinic feedstock to obtain a gaseous stream rich in ethylene and a liquid stream containing C.sub.3.sup.+ olefin, and contacting an olefinic feedstock stream from the prefractionating step with ZSM-5 type oligomerization catalyst in a series of exothermic catalytic reactors to provide a heavier hydrocarbon effluent stream comprising distillate, gasoline and lighter hydrocarbons. In a preferred embodiment a catalytic system is provided for making gasoline or diesel fuel from an olefinic feestock containing ethylene and C.sub.3.sup.+ lower olefins comprising a prefractionation system for separating and recovering ethylene and a liquid stream rich in C.sub.3.sup.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: May 22, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Bernard S. Wright, Hartley Owen, Chung H. Hsia