Network of dividing-wall columns in complex processing units
First Claim
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1. A processing unit comprising:
- a naphtha hydrotreating unit comprising a first divided wall column, a naphtha splitter system, and a deisopentanizer column;
wherein the first divided wall column comprises;
a wall dividing a top portion of the first divided wall column into a first top section and a second top section;
an outlet associated with the second top section of the first divided wall column for recovery of liquid petroleum gas; and
an outlet associated with a bottoms portion of the first divided wall column and coupled to the naphtha splitter system;
wherein the deisopentanizer column is coupled to an output of the naphtha splitter system;
an isomerization unit coupled to an outlet of the deisopentanizer column and comprising a second divided wall column and a stabilizer column;
wherein the second divided wall column comprises;
a wall dividing a top portion of the second divided wall column into a first top section and a second top section;
an inlet coupled to an outlet of a stabilizer column of the isomerization unit;
an outlet associated with the second top section of the second divided wall column for recovery of a first isomerate stream; and
an outlet associated with a bottoms portion of the second divided wall column for recovery of a second isomerate stream;
wherein the stabilizer column comprises an outlet associated with a bottom section of the stabilizer column and coupled to the second divided wall column and an outlet associated with a top section of the stabilizer column and coupled to the first top section of the first divided wall column; and
an isomerization reactor coupled between the deisopentanizer column and the stabilizer column.
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Abstract
A processing unit includes a naphtha hydrotreating unit comprising a first divided wall column, a naphtha splitter system, and a deisopentanizer column coupled to an output of a naphtha splitter of the naphtha splitter system, an isomerization unit coupled to an outlet of the deisopentanizer column, and a second divided wall column. The processing unit also includes an isomerization reactor coupled between the deisopentanizer column and the stabilizer column.
16 Citations
19 Claims
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1. A processing unit comprising:
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a naphtha hydrotreating unit comprising a first divided wall column, a naphtha splitter system, and a deisopentanizer column; wherein the first divided wall column comprises; a wall dividing a top portion of the first divided wall column into a first top section and a second top section; an outlet associated with the second top section of the first divided wall column for recovery of liquid petroleum gas; and an outlet associated with a bottoms portion of the first divided wall column and coupled to the naphtha splitter system; wherein the deisopentanizer column is coupled to an output of the naphtha splitter system; an isomerization unit coupled to an outlet of the deisopentanizer column and comprising a second divided wall column and a stabilizer column; wherein the second divided wall column comprises; a wall dividing a top portion of the second divided wall column into a first top section and a second top section; an inlet coupled to an outlet of a stabilizer column of the isomerization unit; an outlet associated with the second top section of the second divided wall column for recovery of a first isomerate stream; and an outlet associated with a bottoms portion of the second divided wall column for recovery of a second isomerate stream; wherein the stabilizer column comprises an outlet associated with a bottom section of the stabilizer column and coupled to the second divided wall column and an outlet associated with a top section of the stabilizer column and coupled to the first top section of the first divided wall column; and an isomerization reactor coupled between the deisopentanizer column and the stabilizer column. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated hydrocarbon conversion process for use in a system comprising a naphtha hydrotreating unit and an isomerization unit, the process comprising:
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providing a feed to a first divided wall column, the first divided wall column comprising; a wall dividing a top portion of the first divided wall column into a first top section and a second top section; an outlet associated with the second top section of the first divided wall column for recovery of liquid petroleum gas; and an outlet associated with a bottoms portion of the first divided wall column and coupled to a naphtha splitter system; removing liquid petroleum gas from the second top section of the first divided wall column; feeding a bottoms product from the first divided wall column to a second divided wall column, the second divided wall column comprising; a wall dividing a middle portion of the second divided wall column into a first middle section and a second middle section; an inlet coupled to the bottoms portion of the first divided wall column; an outlet associated with a top portion of the second divided wall column for recovery of a first naphtha stream; an outlet associated with the second middle section for recovery of a second naphtha stream; and an outlet associated with a bottoms portion of the second divided wall column for recovery of a third naphtha stream; feeding the first naphtha stream from the top portion of the second divided wall column to a deisopentanizer column; feeding a bottoms fraction from the deisopentanizer column to an isomerization reactor; feeding a product from the isomerization reactor to a stabilizer column; feeding a first stabilized isomerate from the stabilizer column to a third divided wall column, the third divided wall column comprising; a wall dividing a top portion of the third divided wall column into a first top section and a second top section; an inlet coupled to an outlet of a stabilizer column of the isomerization unit; an outlet associated with the second top section of the third divided wall column for recovery of a first isomerate stream; and an outlet associated with a bottoms portion of the third divided wall column for recovery of a second isomerate stream; feeding a second stabilized isomerate from the stabilizer column to the first top section of the first divided wall column; and recovering isomerate from the third divided wall column. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification