METHOD OF ISOMERISING STARTING MATERIAL CONTAINING BENZENE AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2009 - IPC C07C5/22 C07C9/14 C10G69/02 B01J3/00 B01J8/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a benzene hydrogenation and ring opening method and isomerisation of C₅-C₆ paraffins of starting paraffin material, which contains normal paraffins C₅-C₆ and at least 1 wt % benzene, involving: (a) feeding starting material, without tapping or condensing hydrogen, into a drier for removing water and obtaining dried starting material containing not less than 0.5 wt % water; (b) combination of dried starting material with a hydrogen-rich gas stream with formation of a mixed load; (c) feeding the mixed load at temperature ranging from 38 to 232°C into the hydrogenation zone, and bringing the said mixed load into contact with a hydrogenation catalyst under hydrogenation conditions in order to saturate benzene and form a stream of products, removed from the hydrogenation zone, with temperature ranging from 149 to 288°C and containing less than 1.5 wt % benzene; hydrogenation conditions include excess pressure from 1400 kPa to 4800 kPa, hourly space velocity for feeding the load from 1 to 40 h^-1 and ratio of contained hydrogen to hydrocarbons ranging from 0.1 to 2; (d) regulation of temperature of the stream of product removed from the hydrogenation zone in the interval from 104 to 204°C through at least heat exchange of the product removed from the hydrogenation zone with the mixed load; (e) feeding at least part of the product removed from the hydrogenation zone into the isomerisation zone and bringing the stream of the said load into contact with an isomerisation catalyst under isomerisation and ring opening conditions at excess pressure ranging from 1380 to 4830 kPa; and (f) extraction of the isomerisation product obtained in the isomerisation zone. The invention also relates to a device for realising the proposed method.

EFFECT: use of the proposed invention provides for economisation by reducing the number of units of the equipment used and equipment expenses, and also reduces amount of hydrogen required for carrying the process.

9 cl, 1 tbl, 1 dwg