FIELD: chemistry.
SUBSTANCE: invention relates to a process for separating iso-pentane, isohexane, hexane fraction, reducing the proportion of the recycle stream in the system is to allocate the commodity isomerate from the feed stream by sequentially passing the last column stabilization, deisopentanization column and deisohexanization column. The method is characterized in that the withdrawal of the side stream from column deizopentanization is performed in the stripping section; heating the stripping section of the column a residue using heat stabilization.
EFFECT: installation of the stripping section allows to improve the quality of fractionation by stripping off light isopentane components and to reduce the amount of recycle stream.
1 tbl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
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| METHOD FOR PREPARING HIGH-OCTANE ADDITIVE | 2003 |
|
RU2248342C1 |
| METHOD OF HYDROCARBON ISOMERISATION | 2006 |
|
RU2364582C2 |
