Combination isomerization-alkylation process
AssigneeExxon Research & Engineering Co.
InventorsJohn F. Moser, Jr., William C. Behrmann
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Abstract
Alkylates of enhanced product quality are prepared by isomerizing a mixed butenes-containing feed prior to alkylating said feed with a saturated hydrocarbon, preferably an isoparaffin, in the presence of a catalyst comprising a strong acid such as halosulfuric acid, trihalomethanesulfonic acid or mixtures thereof and a moderator containing at least one oxygen atom per molecule. A preferred catalyst is fluorosulfuric acid and water.
Claims8
In an alkylation process which comprises contacting a feed containing linear pentene-1 and linear pentene-2 with a paraffin at alkylation conditions in the presence of a catalyst comprising a strong acid selected from the group consisting of halosulfuric acid, trihalomethanesulfonic acid and mixtures thereof, the improvement which comprises (1) contacting said feed with an isomerization catalyst at isomerization conditions to convert at least a portion of said pentene-2 to pentene-1 prior to subjecting said feed to alkylation conditions and (2) recovering an alkylate of enhanced octane number relative to the alkylate obtained in the absence of the isomerization step (1).
Dependencies are inferred from the claim text.