Feedstock preparation of olefins for oligomerization to...

Details Feedstock preparation of olefins for oligomerization to... Feedstock preparation of olefins for oligomerization to...

2006-07-19

2010-06-22

Hill, Jr., Robert J (Department: 1797)

Chemistry of hydrocarbon compounds

Compound or reaction product mixture

Polymer of indefinite molecular weight

C585S014000, C585S016000, C208S014000, C208S015000, C208S016000

Reexamination Certificate

active

07741526

ABSTRACT:
A feedstock containing at least 1 wt % butenes, at least 1 wt % pentenes, at least 1 wt % hexenes, at least 10 wppm C4dienes, at least 10 wppm C5dienes, and optionally at least 10 wppm C6dienes can be selectively hydrogenated over a catalyst (e.g., a noble metal) to form a stream containing 100 wppm to 4000 wppm total dienes. The hydrogenated stream, and an olefinic recycle stream having less than 10 wt. % C1+moieties, can be contacted with a molecular sieve catalyst, e.g., at a recycle to feed ratio between 0.1 and 3.0, at a WHSV of at least 1.0 based on olefin in the feed, and at a reactor ΔT no greater than 40° F. (22° C.), thus forming a reaction product that can then be separated into a distillate, e.g., having from 1 wt % to 30 wt % non-normal C9olefins, and the aforementioned olefinic recycle stream.

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