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US 2013/0172647 A1Published application
Propylene production process
AssigneesEquistar Chemicals, LP, Lyondell Chemical Technology, L.P.
InventorsSteven T. Coleman, Gary A. Sawyer, Robert S. Bridges, Shaotian Wang, Lawrence M. Candela
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Abstract
Processes and systems for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including at least 95 wt. % 2-butene with ethylene in the presence of a metathesis catalyst to form a metathesis product stream including propylene, and recovering propylene from the process.
Claims22
A process for forming propylene comprising:
- separating a butene feed stream in a butene fractionation system that, in operation, separates 1-butene from 2-butene;
- recovering 2-butene from the butene fractionation system and utilizing the 2-butene to form a metathesis feed stream comprising at least 95 wt. % 2-butene;
- reacting the metathesis feed stream with ethylene in the presence of a metathesis catalyst to form a metathesis product stream comprising the propylene;
- and
- recovering the propylene from the process.
2 more elements
A process for forming propylene comprising:
- reacting a first feed stream comprising ethylene with a dimerization catalyst to form a dimerization product stream;
- fractionating the dimerization product stream to form a 2-butene stream;
- reacting the 2-butene stream with ethylene in the presence of a metathesis catalyst to form a metathesis product stream comprising the propylene, wherein the 2-butene stream reacts with the ethylene in the absence of an amount of isomerization catalyst sufficient to isomerize butene;
- and
- recovering the propylene from the process, wherein the process produces at least 100 MM lbs/yr of the propylene.
2 more elements
Dependencies are inferred from the claim text.