Process and apparatus for oligomerization in multiple stages with single fractionation column
AssigneeUop LLC
InventorsBipin Vora, Charles Luebke, Jill Meister, Michael Schultz, Dale Shields
Life of this patent
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Abstract
In an oligomerization process comprising at least two oligomerization reactors, at least portions of product streams from two reactors are separated in the same separator vessel. In an embodiment, a liquid product stream from the first oligomerization reactor is fed to a fractionation column and a side cut from the fractionation column feeds the second oligomerization reactor.
Claims20
A process for oligomerizing light olefins to produce heavy olefins comprising:
- feeding a first reactant stream of light olefins to a first reactor containing a solid oligomerization catalyst;
- catalytically oligomerizing said light olefins to product oligomers in said first reactor;
- passing at least a portion of a first product stream from said first reactor to a separation vessel to separate light olefins from product oligomers;
- passing a second reactant stream of light olefins from said separation vessel to a second reactor containing a solid oligomerization catalyst;
- catalytically oligomerizing said light olefins to product oligomers in said second reactor;
- and
- passing at least a portion of a second product stream from said second reactor to said separation vessel to separate light olefins from said product oligomers.
A process for oligomerizing light olefins to produce product oligomers comprising:
- feeding a first reactant stream of light olefins to a first reactor containing a solid oligomerization catalyst;
- catalytically oligomerizing said light olefins to product oligomers in said first reactor;
- passing at least a portion of a first product stream from said first reactor to a fractionation column to separate light olefins from product oligomers;
- taking a side cut from said fractionation column;
- passing said side cut as a second reactant stream of light olefins to a second reactor containing a solid oligomerization catalyst;
- and
- catalytically oligomerizing said light olefins to product oligomers in said second reactor.
An apparatus for oligomerizing light olefins and recovering product oligomers comprising:
- a first oligomerization reactor vessel including a feed inlet for delivering light olefins to the reactor vessel and a first product outlet for removing light olefins and product oligomers from said first oligomerization reactor vessel;
- a first product line with a first end in fluid communication with said first product outlet of said first oligomerization reactor vessel and a second end in communication with a fractionation column;
- a feed line with a first end in fluid communication with said fractionation column and a second end in fluid communication with an inlet to a second oligomerization reactor vessel;
- a second product outlet for removing light olefins and product oligomers from said second oligomerization reactor vessel;
- and
- a return line with a first end in fluid communication with said second product outlet and a second end in fluid communication with said fractionation column.
Dependencies are inferred from the claim text.