METHOD OF ALKYLATING PARAFFINS Russian patent published in 2011 - IPC C07C2/56 C07C11/02 C07C2/62 C07C7/04 

FIELD: chemistry.

SUBSTANCE: invention relates to versions of alkylating isobutene with olefins. One of the versions involves a method of alkylating isobutane with C₄ olefin or C₄ olefin and at last one of C₃ or C₅ olefin, involving: (a) feeding isobutene, isopentane and C₄ olefin or C₄ olefin and at least one of C₃ or C₅ olefin into a first alkylation system, where a portion of isobutane reacts with a portion of olefin to obtain an output stream which contains a diluted stream of alkylate which contains unreacted components, including isopentane and isobutane; (b) feeding the output stream from the first alkylation system into a debutaniser, where C₄ and at least a portion of isopentane are removed as first distillates, and the first alkylation product is removed as first stillage residue; (c) feeding first distillates and a stream containing isobutene into a second alkylation system where isobutane reacts with C₄ olefins in said first distillates to form a second alkylation product.

EFFECT: use of said methods lowers cost and power consumption owing to a new processing scheme.

39 cl, 3 tbl, 5 dwg