METHOD OF HYDROCARBON ISOMERISATION Russian patent published in 2009 - IPC C07C5/22 C07C9/16 

FIELD: chemistry.

SUBSTANCE: invention relates to method of polymerisation of raw material flow containing C₅-C₆ hydrocarbons, which includes: loading of hydrogen and raw material, containing at least, normal C₅-C₆ hydrocarbons into isomerisation zone and contacting of hydrogen and raw material with isomerisation catalyst in conditions that favour increase of degree of hydrocarbons branching in raw material flow and ensuring formation of outgoing flow from isomerisation zone, which contains, at least, butane, normal pentane, normal hexane, methylbutane, dimethylbutane, methylpentanes and hydrocarbons which have seven or more carbon atoms, isomerisation conditions including temperature from 40° to 235°C and pressure 70 kPa abs. to 7000 kPa abs; passing outgoing flow from isomerisation zone through deisohexanizer zone in order to divide it into four flows, flow outgoing from upper part of deisohexaniser zone, containing, at least, butane, first side flow from deisohexaniser zone, containing, at least, methylbutane and dimethylbutanes, second side flow from deisohexaniser zone, containing, at least, methylpentanes and normal hexane, and lower flow from deisohexaniser zone, containing, at least, hydrocarbons, consisting of seven and more carbon atoms; and supply of first side flow from deisohexaniser zone into zone of isomerizate stripping in order to separate upper flow from isomerisate desorber which contains, at least, butane, from product flow from zone of isomerisate stripping, containing methylbutane and dimethylbutanes.

EFFECT: application of claimed method allows to reduce capital outlays and reduce cost of energy supply due to excluding of column-stabiliser.

9 cl, 4 dwg