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US 7,012,167 B2Granted
Diisobutylene process
AssigneeLyondell Chemical Technology, L.P.
InventorAndrew P. Kahn
Life of this patent
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Abstract
This invention is a process for producing diisobutylene from isobutylene. The process comprises first oligomerizing isobutylene to diisobutylene using a sulfonic acid-type ion exchange resin. The oligomerization step is followed by contacting the diisobutylene product with an adsorbent to remove sulfur impurities produced during the oligomerization step. The adsorbent is a large pore zeolite such as zeolite X and zeolite Y. Optionally, the purified diisobutylene may be hydrogenated to isooctane using a hydrogenation catalyst.
Claims9
A process comprising:
- (a) oligomerizing isobutylene in the presence of a sulfonic acid resin catalyst to produce a diisobutylene stream containing minor amounts of sulfur impurities;
- and
- (b) contacting the diisobutylene stream with a large pore zeolite to produce a diisobutylene product having a reduced amount of sulfur impurities.
A process comprising:
- (a) oligomerizing isobutylene in the presence of a sulfonic acid resin catalyst to produce a diisobutylene stream containing minor amounts of sulfur impurities;
- (b) contacting the diisobutylene stream with a large pore zeolite selected from the group consisting of zeolite X and zeolite Y to produce a diisobutylene product having a reduced amount of sulfur impurities;
- and
- (c) hydrogenating the diisobutylene product having a reduced amount of sulfur impurities in the presence of a hydrogenation catalyst to form isooctane.
1 more element
Dependencies are inferred from the claim text.