Catalysts for deep catalytic cracking of petroleum naphthas and other hydrocarbon feedstocks for the selective production of light olefins and method of making thereof

摘要

Provided herein are monocomponent and hybrid catalyst compositions for use in steam-cracking of hydrocarbon feeds to selectively produce light olefins. The catalyst compositions being characterized by a first catalytic component comprising oxides of aluminum, silicon, chromium, and optionally, oxides of monovalent alkaline metals, and further comprising a binder, preferably bentonite clay. Preferably, the catalyst compositions will comprise a catalytic component in accordance with the following formula: (a) SiO₂·(b) A1₂O₃·(c) Cr₂O₃(d) alk₂O, with alk being a monovalent alkaline metal, preferably selected from sodium, potassium and lithium. The second catalytic component is selected from a crystalline zeolite or a silica molecular sieve. Also provided in the present invention are methods of making the catalyst compositions.