PROCESS FOR ISOMERIZING A FEED STREAM INCLUDING ONE OR MORE C4-C6 HYDROCARBONS
First Claim
1. A process for isomerizing a feed stream comprising one or more C4-C6 hydrocarbons, comprising:
- A) contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent;
B) passing at least a portion of the isomerization zone effluent to a stabilizer zone and recovering a stabilizer overhead stream comprising one or more C5−
hydrocarbons, a bottom stream comprising at least about 85%, by weight, one or more C6+ hydrocarbons, and a stripper feed stream comprising at least about 10%, by weight, one or more C5+ hydrocarbons;
C) passing the stripper feed stream to a stripping zone and separating the stripper feed stream into a stripper overhead stream comprising at least about 5%, by weight, one or more C4−
hydrocarbons and a stripper bottom stream comprising at least about 90%, by weight, one or more C5+ hydrocarbons; and
(D) recycling at least a portion of the stripper bottom stream to a deisopentanizer zone and passing a stream from the deisopentanizer zone to the isomerization reaction zone.
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Accused Products
Abstract
One exemplary embodiment can be a process for isomerizing a feed stream including one or more C4-C6 hydrocarbons. The process may include contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent; passing at least a portion of the isomerization zone effluent to a stabilizer zone and recovering a stabilizer overhead stream, a bottom stream, and a stripper feed stream; passing the stripper feed stream to a stripping zone and separating the stripper feed stream into a stripper overhead stream and a stripper bottom stream; and recycling at least a portion of the stripper bottom stream to a deisopentanizer zone and passing a stream from the deisopentanizer zone to the isomerization reaction zone. Usually, the stabilizer overhead stream includes one or more C5− hydrocarbons, the bottom stream includes at least about 85%, by weight, one or more C6+ hydrocarbons, and a stripper feed stream including at least about 10%, by weight, one or more C5+ hydrocarbons. Often, a stripper overhead stream includes at least about 5%, by weight, one or more C4− hydrocarbons and a stripper bottom stream includes at least about 90%, by weight, one or more C5+ hydrocarbons.
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Citations
20 Claims
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1. A process for isomerizing a feed stream comprising one or more C4-C6 hydrocarbons, comprising:
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A) contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent; B) passing at least a portion of the isomerization zone effluent to a stabilizer zone and recovering a stabilizer overhead stream comprising one or more C5−
hydrocarbons, a bottom stream comprising at least about 85%, by weight, one or more C6+ hydrocarbons, and a stripper feed stream comprising at least about 10%, by weight, one or more C5+ hydrocarbons;C) passing the stripper feed stream to a stripping zone and separating the stripper feed stream into a stripper overhead stream comprising at least about 5%, by weight, one or more C4−
hydrocarbons and a stripper bottom stream comprising at least about 90%, by weight, one or more C5+ hydrocarbons; and(D) recycling at least a portion of the stripper bottom stream to a deisopentanizer zone and passing a stream from the deisopentanizer zone to the isomerization reaction zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process for isomerizing a feed stream comprising one or more C4-C6 hydrocarbons, comprising:
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A) contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent; B) passing at least a portion of the isomerization zone effluent to a stabilizer column and recovering a stabilizer overhead stream comprising one or more C5−
hydrocarbons, and a bottom stream comprising at least about 85%, by weight, one or more C6+ hydrocarbons;C) passing the stabilizer overhead stream to a receiver; D) withdrawing a receiver bottom stream from the receiver and providing at least a portion as a stripper feed stream comprising at least about 10%, by weight, one or more C5+ hydrocarbons; and E) recycling a stripper bottom stream comprising at least about 90%, by weight, one or more C5+ hydrocarbons to a deisopentanizer zone and passing a stream from the deisopentanizer zone to the isomerization reaction zone. - View Dependent Claims (12, 13, 14)
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15. A process for isomerizing a feed stream comprising one or more C4-C6 hydrocarbons, comprising:
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A) contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent; B) passing at least a portion of the isomerization zone effluent to a stabilizer column and recovering a stabilizer overhead stream comprising one or more C5−
hydrocarbons, a bottom stream comprising at least about 85%, by weight, one or more C6+ hydrocarbons, and a side-stream comprising at least about 85%, by weight, one or more C5+ hydrocarbons;C) passing at least a portion of the side-stream to a stripper column; and D) recycling a stripper bottom stream comprising at least about 90%, by weight, one or more C5+ hydrocarbons to a deisopentanizer zone and passing a stream from the deisopentanizer zone to the isomerization reaction zone. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification