FIELD: chemical technology. SUBSTANCE: products: benzene, empirical formula is C6H6, yield is 14.2-14.6%; toluene, empirical formula is C7H8, yield is 22.2-23.3%; o- and p-xylenes, empirical formula is C8H10, yield is 6.0-8.9% . Reagent 1: C3-C4-alkanes. Catalyst: Zn- or Ga-containing zeolite type ZSM-8. Process conditions: reactor block consisting of cascade of consecutive connected 3-4 reactors, at 400-600 C. Recycle of m-xylene fraction isolated from products contacting to the last by course reaction reactor, time contacting in the last reactor is 0.3-1.8 s. EFFECT: improved method of synthesis. 2 cl, 2 dwg, 8 tbl
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