Processing C4 olefin streams for the maximum production of propylene
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 8, 2007
Grant Date -
Jan 20, 2005
app pub date -
Jul 15, 2003
filing date -
Jul 15, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to maximize the production of propylene when the external supply of ethylene is limited, the C.sub.4 cut from a hydrocarbon cracking process is first subjected to autometathesis prior to any isobutylene removal and without any ethylene addition. This favors the reactions which produce propylene and pentenes. The ethylene and propylene produced are then removed leaving a stream of the C.sub.4's and heavier components. The C.sub.5 and heavier components are then removed leaving a mixture of 1-butene, 2-butene, isobutylene, and iso- and normal butanes. The isobutylene is next removed preferably by a catalytic distillation hydroisomerization de-isobutyleneizer. The isobutylene-free C.sub.4 stream is then mixed with the product ethylene removed from the autometathesis product together with any fresh external ethylene needed and subjected to conventional metathesis producing additional propylene.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully