A catalyst composition for use in the conversion of oxygenates to olefins comprises a first crystalline silicoaluminophosphate molecular sieve comprising at least one intergrown form of an AEI structure type material and a CHA structure type material, and a second crystalline material different from said first molecular sieve and resulting from dehydration of an aluminophosphate or silicoaluminophosphate hydrate.

 
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< Process for producing alkyl aromatic compound

> Production of olefins

> Trimerisation and oligomerisation of olefins using a chromium based catalyst

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