ZEOLITE-CONTAINING CATALYST, METHOD FOR PREPARATION THEREOF, AND A METHOD FOR CONVERTING ALIPHATIC HYDROCARBONS INTO AROMATIC HYDROCARBON CONCENTRATE OR HIGH-OCTANE GASOLINE COMPONENT (OPTIONS) Russian patent published in 2004 - IPC

FIELD: petroleum processing and petrochemistry. SUBSTANCE: zeolite-containing catalyst comprising (i) zeolite selected from pentasil group with silica/alumina molar ratio 55-102 and residual sodium oxide content 0.02-0.07% and (ii) zinc, tin, and lanthanum oxides as zeolite structure elements and chromium oxide as promoter has following analysis, wt %: zeolite 65.0-80.0, ZnO 0.0-4.0, La₂O₃ 0.0-0.8, SnO₂ 0.0-2.5, Cr₂O₃ 0.0-5.0, Na₂O 0.02-0.07, and binding component - the balance. Preparation of zeolite-containing catalyst involves hydrothermal synthesis of Na-form zeolite followed by salt ion exchange to give ammonium-form zeolite, which is modified with lanthanum, supplemented by chromium hydroxide to give catalyst paste to be further granulated, dried, and calcined at 550-600 C. Aliphatic hydrocarbons are converted into aromatic hydrocarbon concentrate or high-octane gasoline component by passing gaseous blend of low-molecular saturated hydrocarbons or straight- run gasoline fraction vapors through zeolite-containing catalyst bed. EFFECT: increased degree of conversion and enabled preparation of condensed phase of aromatic hydrocarbon concentrate directly from gaseous feedstock, for example from associated petroleum gases and long light hydrocarbon fraction. 4 cl, 1 dwg, 5 tbl, 6 ex