Binderless ex situ selectivated zeolite catalyst

   
   

There is provided a substantially binder-free catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The catalyst may be used in a hydrocarbon conversion process, such as toluene disproportionation.

Se proporciona un tamiz molecular catalítico substancialmente carpeta-libre que ha sido modificado siendo situ ex selectivated con un compuesto del silicio. El selectivation ex del situ implica el exponer del tamiz molecular por lo menos a dos secuencias de la impregnación del silicio, cada secuencia que abarca una impregnación con un compuesto del silicio seguido por la calcinación. El catalizador se puede utilizar en un proceso de la conversión del hidrocarburo, tal como disproportionation del tolueno.

 
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