NETWORK OF DIVIDING-WALL COLUMNS IN COMPLEX PROCESSING UNITS
First Claim
1. A processing unit comprising:
- a naphtha hydrotreating unit comprising 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;
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 comprising a second divided wall column, the second divided wall column comprising;
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;
an isomerization reactor coupled between the deisopentanizer column and the stabilizer column.
3 Assignments
0 Petitions
Accused Products
Abstract
A processing unit includes a naphtha hydrotreating unit comprising a first divided wall column. The first divided wall column includes a wall dividing a top portion of the first divided wall column, 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. The processing unit also includes 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 second divided wall column includes a wall dividing a top portion of the second divided wall column, an inlet coupled to an outlet of a stabilizer column of the isomerization unit, an outlet 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. The processing unit also includes an isomerization reactor coupled between the deisopentanizer column and the stabilizer column.
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Citations
20 Claims
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1. A processing unit comprising:
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a naphtha hydrotreating unit comprising 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; 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 comprising a second divided wall column, the second divided wall column comprising; 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; 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. A heat-integrated process for 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 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; recovering isomerate from the third divided wall column. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification