초록 ▼

This invention provides a novel base-exchanged shape-selective hydrogenation-dehydrogenation-dehydrocyclization catalyst composition which is a zeolite matrix having a silica-alumina ratio of at least 12, and having a shape-selective functioning intrazeolitic Group VIII metal content between about 0

This invention provides a novel base-exchanged shape-selective hydrogenation-dehydrogenation-dehydrocyclization catalyst composition which is a zeolite matrix having a silica-alumina ratio of at least 12, and having a shape-selective functioning intrazeolitic Group VIII metal content between about 0.01-10 weight percent. The zeolite catalyst is adapted for efficient shape-selective metal function hydrogenolysis, dehydrogenation and aromatization conversion of hydrocarbon mixtures, with a minimized acid-catalyzed cracking activity.

대표청구항 ▼

A process for the production of aromatic hydrocarbons which comprises contacting C6-C50 hydrocarbon feedstock under reforming conditions with a base-exchanged shape-selective crystalline zeolite catalyst compositions; wherein said catalyst is a zeolite having a silica/alumina ratio of at least 12 an

A process for the production of aromatic hydrocarbons which comprises contacting C6-C50 hydrocarbon feedstock under reforming conditions with a base-exchanged shape-selective crystalline zeolite catalyst compositions; wherein said catalyst is a zeolite having a silica/alumina ratio of at least 12 and having a shape-selective functioning intrazeolitic Group VIII metal content between about 0.01-10 weight percent, and wherein said catalyst is prepared by a process which comprises (1) subjecting as-synthesized crystalline zeolite material having a silica/alumina ratio of at least 12 to calcination at a temperature between about 200° -600°C. for a period between about 1-48 hours; (2) contacting the calcined zeolite with an aqueous solution of Group VIII metal compound to exchange or sorb ionic Group VIII metal into the zeolite; (3) thermally treating the Group VIII metal-containing zeolite at a temperature in the range between about 150° -550°C.; and (4) bae exchanging the zeolite substrate with Group IA metal cations to lower or essentially eliminate the base-exchangeable acidic content of the catalyst composition.