PURPOSE: To obtain an isomerate having a high octane number with an suppressed amount of energy consumption by separating a vapor phase and a liquid phase after isomerization of 5C/6C fractions, removing n-paraffin from a vapor flux by means of adsorption, and deisohexanizing an effluent.
CONSTITUTION: A feed material F mainly comprising 5C/6C fractions is passed together with a vapor phase recycled from a separator S1, distillation columns D, DI and a vapor flux to an isomerization reactor I, to carry out isomerization. An effluent is passed to a separator S1, to separate a vapor phase to be recycled into a reactor I from a liquid phase contg. crude isomerate. The vapor flux of the liquid effluent is passed to an adsorber A, to recover the isomerate freed from n-paraffin. Then, the isomerate is passed to the distillation column DI, to separate it into a liquid residue, a vapor flux rich in methyl-pentanes and a final isomerized product. Then, deisohexanization is carried out and a fraction rich in methylpentanes is used as a desorbent for the adsorber A. The desorbed product is recycled into the isomerization reactor I, to isomerize n-paraffin efficiently.
| WO/2005/021255 | COMPOSITE TUBE |
| WO/1997/004042 | SETTLING AIDS FOR SOLIDS IN HYDROCARBONS |
| WO/2002/079347 | FLUID ATOMIZATION PROCESS |
ANDORE DESHIYAN
JIYAN POORU KARIU
