Two-stage production of olefins utilizing a faujasite structure zeolite in hydrogenation stage

US4188281A · kind A · utility

Assignees

• Linde GmbH · DE
• BAYER HEALTHCARE LLC · DE

Inventors

• Hans J. Wernicke · Wolfratshausen, DE
• Allan Watson · Ottobrunn, DE
• Walter Kreuter
• Manfred Mansmann
• Horst Weber · Lüdenscheid, DE

Key dates

• Filing date: May 12, 1978
• Grant date: Feb 12, 1980
• Expiry date: May 12, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2400/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

In a process for the production of olefins in two stages wherein, in the first stage, heavy petroleum fractions are hydrogenated in the presence of hydrogen and a hydrogenation catalyst and, in the second stage, the thus-hydrogenated fractions are subjected to thermal cracking the presence of steam, the improvement which comprises employing as the hydrogenation catalyst a zeolite of the faujasite structure combined with elements from Groups VIB, VIIB and VIII of the periodic table of the elements, wherein the alkali component of the zeolite is exchanged at least partially for ammonium, hydronium, alkaline earth and/or rare earth ions, and the elements are present in a metallic, ionic, oxidic and/or sulfidic form.