Heat exchange technique for olefin fractionation and catalytic conversion system
A heat balanced technique is claimed 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 +/ olefins; a multi-stage adiabatic downflow reactor system operatively connected for serially contacting olefinic feedstock with a plurality of fixed shape selective oligomerization catalyst beds; means for thermally exchanging hot reactor effluent from at least one catalyst bed with at least a portion of a prefractionation liquid stream for reboiling the liquid stream; and means for recovering gasoline and diesel product from the catalytic system.
- Assignee:
- Mobil Oil Corp.
- Patent Number(s):
- US 4450311
- OSTI ID:
- 6339128
- Country of Publication:
- United States
- Language:
- English
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Olefin fractionation and catalytic conversion system
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Related Subjects
020400* -- Petroleum-- Processing
ALKENES
BOILING
CATALYSIS
CHEMICAL PREPARATION
CHEMICAL REACTORS
DIESEL FUELS
ENERGY TRANSFER
ETHYLENE
FRACTIONATION
FUELS
GASOLINE
HEAT TRANSFER
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
SEPARATION PROCESSES
SYNTHESIS
ZEOLITES