Production of olefins

A process for cracking or decomposing a feedstream containing a major proportion of at least dialkyl ether to produce the corresponding olefins comprises contacting the feedstream with a faujasite aluminosilicate catalyst, wherein at least about 50 wt.% of the alkali metal content orginally present...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GRAEME IAN COX, DANIEL DAVID ROSENFELD, DERRICK DUMONT PETE
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for cracking or decomposing a feedstream containing a major proportion of at least dialkyl ether to produce the corresponding olefins comprises contacting the feedstream with a faujasite aluminosilicate catalyst, wherein at least about 50 wt.% of the alkali metal content orginally present in said faujasite has been exchanged by at least one alkaline earth metal, characterized in that prior to the contacting the catalyst is pretreated with steam which enhances its selectivity and reduces the undesirable by-product yields.