FIELD: industrial organic synthesis. SUBSTANCE: p-xylene is produced from raw material with boiling point up to 200 C. This material is brought in contact with LSM-5-type zeolite catalyst and process is carried out in gas phase at elevated temperature and pressure. Conversion of hydrocarbon and/or oxygen-containing organic material is effected in a hydrogen-containing gas medium or synthesis gas at 300 to 400 C, pressure 9 to 80 atm, and raw material weight flow rate 1 to 10 h-1 in flow-circulation system, in which gas stream is cooled coming out of reactor. Condensed reaction products are separated and a part of gas stream is recycled. In one embodiment of invention, as raw material, C2-C7-olefins are used and process is carried out in presence of synthesis gas at olefin to CO molar ratio 1 to 3. Used are also: C1-C8-alcohols or aldehydes and/or ketones, or their mixtures in any proportions. In another embodiment of invention, p-xylene is produced from organic material with boiling point up to 200 C on LSM-5-type zeolite catalyst containing metal oxide component. The latter may contain at least three metal oxides and has general formula aCuO bZnO CAl2O3 dCr2O3 eW2O5 where a-e are weight portions and, in particular, a=0-56, b=24-67, c=0-6, d= 0-32, e=0-1 on condition that a and d cannot be zero simultaneously. Zeolite to metal oxide component weight ratio varies from 2:8 to 3:7. When toluene is used as raw material, process is carried out in presence of synthesis gas at toluene to CO molar ratio (2-4):1. EFFECT: increased yield of p-xylene and extended resource of raw materials. 7 cl, 5 tbl
Authors
Dates
1998-07-10—Published
1996-12-16—Filed