Back to results
US 2026/0070859 A1Published application
Method for increasing product recovery in an oligomerization process
AssigneeUop LLC
InventorsJeannie M. Blommel, Matthew C. Cole, Joel S. Paustian, Manuela Serban
Life of this patent
Estimating the term…
Abstract
Methods for increasing product recovery in an oligomerization process are described. The methods comprise incorporating an additional oligomerization reaction zone to oligomerize a portion of the olefin splitter bottom stream and/or the depropanizer overhead stream. The effluent from the additional oligomerization reaction zone is combined with the olefin splitter bottom stream, hydrogenated and fractionated.
Claims19
A method for increasing product recovery in an oligomerization process comprising:
- oligomerizing a mixed olefin stream comprising C2-8 olefins in an oligomerization reaction zone comprising an oligomerization reactor in the presence of an oligomerization catalyst to form an oligomerization effluent stream comprising C9+ olefins and unreacted C2-8 olefins;
- separating the oligomerization effluent stream in a depropanizer column into a depropanizer overhead stream comprising unconverted C2-4 olefins and a depropanizer bottom stream comprising C4+ olefins;
- separating the depropanizer bottom stream in an olefin splitter column into an olefin splitter overhead stream comprising C8− olefins and an olefin splitter bottom stream comprising C9+ olefins;
- condensing the olefin splitter overhead stream into an olefin splitter liquid stream comprising C4-8 olefins;
- oligomerizing a first portion of the olefin splitter liquid stream in a drag oligomerization reaction zone comprising a drag oligomerization reactor in the presence of a drag oligomerization catalyst to form a drag oligomerization effluent stream comprising C9+ olefins, or oligomerizing the depropanizer overhead stream in the drag oligomerization reaction zone comprising the drag oligomerization reactor in the presence of the drag oligomerization catalyst to form the drag oligomerization effluent stream comprising C9+ olefins, or both;
- hydrogenating the olefin splitter bottom stream and the drag oligomerization effluent stream in a hydrogenation reaction zone comprising a hydrogenation reactor to form a hydrogenation effluent stream comprising C9+ paraffins;
- and
- separating the hydrogenation effluent stream in a jet fractionation section comprising a fractionation column into at least a synthetic paraffinic kerosene stream comprising C9-19 paraffins and a diesel blendstock stream comprising C19+ paraffins.
5 more elements
A method for increasing product recovery in an oligomerization process comprising:
- oligomerizing a mixed olefin stream comprising C2-8 olefins in an oligomerization reaction zone comprising an oligomerization reactor in the presence of an oligomerization catalyst to form an oligomerization effluent stream comprising C9+ olefins and unreacted C2-8 olefins;
- separating the oligomerization effluent stream in a depropanizer column into a depropanizer overhead stream comprising unconverted C2-4 olefins and a depropanizer bottom stream comprising C4+ olefins;
- separating the depropanizer bottom stream in an olefin splitter column into an olefin splitter overhead stream comprising C8− olefins and an olefin splitter bottom stream comprising C9+ olefins;
- condensing the olefin splitter overhead stream into an olefin splitter liquid stream comprising C4-8 olefins;
- dividing the condensed olefin splitter liquid stream into a recycle stream and a drag stream;
- recycling the recycle stream to the oligomerization reaction zone;
- oligomerizing the drag stream in a drag oligomerization reaction zone comprising a drag oligomerization reactor in the presence of a drag oligomerization catalyst to form a drag oligomerization effluent stream comprising C9+ olefins, or oligomerizing the depropanizer overhead stream in the drag oligomerization reaction zone comprising the drag oligomerization reactor in the presence of the drag oligomerization catalyst to form the drag oligomerization effluent stream comprising C9+ olefins, or both;
- hydrogenating the olefin splitter bottom stream and the drag oligomerization effluent stream in a hydrogenation reaction zone comprising a hydrogenation reactor to form a hydrogenation effluent stream comprising C9+ paraffins;
- stripping the hydrogenation effluent stream in a flash stripper to form a flash stripper overhead stream comprising C5− hydrocarbons and hydrogen and a flash stripper bottom stream comprising C6+ paraffins;
- and
- separating the flash stripper bottom stream in a jet fractionation section comprising a fractionation column into at least a synthetic paraffinic kerosene stream comprising approximately C9-19 paraffins, meeting ASTM D7566 specifications, and a diesel blendstock stream comprising C19+ paraffins.
8 more elements
Dependencies are inferred from the claim text.