Patent name: METHOD FOR ALKYLATION OF C₄-C₅ ISO-PARAFFINS WITH C₃-C₅ OLEFINS

Patent Number: Patent No. 2127716

Priority: September 24, 1996

March 20, 1999

Process is carried out in cascade of stirred reactors, or in cascade reactors, or in reactors of other types by feeding catalyst complex containing 85-110 wt % sulfuric acid, and sulfolane. Sulfolane to sulfuric acid weight ratio is maintained at 2-6.99 kg per 100 kg of industrial sulfuric acid, at olefin volumetric feed rate of 0.05-1 h^-1, C₄-C₅ isoparaffin to C₃-C₅ olefin weight rate into reactor being from 2.5 to 10 and catalyst complex to hydrocarbon volume ratio being from 1:1 to 0.3:1. Process is carried at 0-10°C. The present invention makes it possible to increase trimethylpentanes in alkylate and simultaneously increase octane number by 4 or 5 points.