Multistage process for converting oxygenates to distillate hydrocarbons with interstage ethene recovery

Patent · Tue Feb 06 04:00:00 EST 1990

OSTI ID:6975990

Hsia, C H; Owen, H; Wright, B S

This patent describes a continuous multi-stage catalytic system for converting oxygenated feedstock to liquid hydrocarbons. It comprises: primary stage catalytic dehydration means containing catalyst for converting oxygenate to light olefinic vapor and normally liquid C{sub 5}{sup +} hydrocarbons; interstage separation means for recovering water and hydrocarbons from the primary stage effluent stream; first fractionation means for recovering ethene from the primary stage olefinic vapor including a sorption tower operatively connected to selectively sorb C{sub 3}{sup +} hydrocarbons from the olefinic vapor in a liquid sorption stream; means for pressurizing and heating the liquid sorption stream containing C{sub 3}{sup +} sorbate; secondary stage catalytic oligomerization reactor means containing medium pore shape selective zeolite oligomerization catalyst for converting olefinic hydrocarbons in the sorption stream to liquid hydrocarbons comprising a major amount of distillate; second fractionation means for separating secondary stage effluent into a light hydrocarbon stream rich in C{sub 3}-C{sub 4} aliphatic hydrocarbons a C{sub 5}{sup +} gasoline stream and distillate range stream; and means for recycling at least a portion of the C{sub 5}{sup +} gasoline stream to the first fractionation means.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4898717; A
• Application Number: PPN: US 6-689638A
• OSTI ID: 6975990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DEHYDRATION
DISTILLATES
ENERGY SOURCES
EVAPORATION
FOSSIL FUELS
FRACTIONATION
FUELS
GASOLINE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHASE TRANSFORMATIONS
PRODUCTION
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
ZEOLITES