Ether production with multi-stage reaction of olefins

Patent · Tue Jul 13 04:00:00 EDT 1993

OSTI ID:6289193

Harandi, M N

A multistage process is described for etherifying a mixed C[sub 4] + olefinic hydrocarbon feedstock containing diene, isoalkene and nalkene, comprising: contacting the olefinic feedstock and aliphatic alcohol in a first reaction stage reaction zone under etherification conditions with acid etherification catalyst to convert a major amount of the isoalkene to C[sub 5] + tertiary-alkyl ether; recovering a reactant effluent from the first stage containing tertiary-alkyl ether product, unreacted alcohol and unreacted olefin comprising n-alkene and diene; separating an ether-rich C[sub 5] + liquid product stream from the first stage effluent in a first product recovery section; reacting at least a fraction of the first stage effluent unconverted olefins and alcohol fraction under low severity oligomerization conditions comprising moderate temperature between 70 C and 280 C and space velocity of 0.5-50 WHSV based on total olefin in the feed in a secondary stage catalytic reaction zone containing porous solid acid oligomerization catalyst particles to oligomerize a major portion of diene; recovering a C[sub 5]+ liquid product stream from secondary stage effluent; and recovering n-alkene substantially free of diene from secondary stage effluent.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): US 5227534; A
• Application Number: PPN: US 7-817187
• OSTI ID: 6289193
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
10 SYNTHETIC FUELS
100200* -- Synthetic Fuels-- Production-- (1990-)
ADDITIVES
ALCOHOLS
ALKENES
CATALYSTS
CHEMICAL REACTIONS
DIENES
DISPERSIONS
ETHERS
FUEL ADDITIVES
HYDROCARBONS
HYDROXY COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POLYENES
POLYMERIZATION
SEPARATION PROCESSES
SYNTHESIS