Multistage process for converting oxygenates to liquid hydrocarbons with ethene recycle

Patent · Tue Sep 24 04:00:00 EDT 1985

OSTI ID:5839477

Gould, R M; Tabak, S A

A process for converting oxygenated feedstock comprising methanol, dimethyl ether or the like to liquid hydrocarbons comprising the steps of contacting the feedstock with zeolite catalyst in a primary catalyst stage at elevated temperature and moderate pressure to convert feedstock to hydrocarbons comprising C/sub 2/-C/sub 4/ olefins and C/sub 5/+ hydrocarbons; cooling and separating effluent from the primary stage to recover a liquid hydrocarbon stream and a light hydrocarbon vapor stream rich in C/sub 2/-C/sub 4/ olefins; compressing the olefinic light hydrocarbon stream to condense a liquid olefinic hydrocarbon stream rich in C/sub 3/+ olefins and recovering an ethene-rich gaseous stream; further pressurizing and contacting the condensed liquid olefinic hydrocarbon stream in a secondary catalytic stage with oligomerization catalyst comprising medium-pore shape selective acidic zeolite at substantially increased pressure and moderate temperature to convert at least a portion of olefins to a heavier liquid hydrocarbon product stream comprising olefinic gasoline and distillate range liquids; and recovering ethene in a gaseous stream for recycle to the primary catalytic stage.

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 4543435
• OSTI ID: 5839477
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALCOHOLS
ALKENES
CHEMICAL FEEDSTOCKS
FRACTIONATION
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUEFACTION
LIQUID FUELS
METHANOL
ORGANIC COMPOUNDS
PRODUCTION
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES