Process for converting oxygenates to alkylated liquid hydrocarbo

Details Process for converting oxygenates to alkylated liquid hydrocarbo Process for converting oxygenates to alkylated liquid hydrocarbo

1985-09-23

1986-12-30

Pal, Asok

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

Including alkylation to produce branched-chain paraffin

585315, 585316, 585640, 585709, 585723, C07C 120, C07C 200

Patent

active

046330283

ABSTRACT:
Alkylate is produced by catalytically converting oxygenate feedstock, such as methanol, to lower olefins comprising C.sub.2 -C.sub.4 olefins. Ethene is separated by interstage sorption of C.sub.3 + components and an isoparaffin is alkylated with C.sub.3 -C.sub.4 olefins derived from sorbate.
The improved technique comprises fractionating an olefinic feedstream containing ethene and C.sub.3 + olefinic components by contacting the olefinic feedstream in a sorption zone with a liquid hydrocarbon sorbent to selectively sorb C.sub.3 + components; reacting C.sub.3 + olefins with excess isoparaffin in a catalytic alkylation reactor to produce C.sub.7 + alkylate hydrocarbons; fractionating the alkylation reactor effluent to provide a liquid hydrocarbon fraction rich in C.sub.7 +, alkylate for recycle to the sorption zone as lean sorbent; and recovering C.sub.7 + alkylate product and C.sub.5 + gasoline from the process.

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