Methanol conversion process with catalyst containing a...

Details Methanol conversion process with catalyst containing a... Methanol conversion process with catalyst containing a...

B - Operations, Transporting

01

J

B01J 29/85 (2006.01) C07C 1/20 (2006.01) C07C 11/02 (2006.01)

Patent

CA 2062254

A silicoaluminophosphate molecular sieve is hydrothermally treated at temperatures in excess of about 700°C for periods sufficient to destroy a large proportion of their acid sites while retaining at least 80 percent of their crystallinity to form a catalyst for converting methanol to lower olefins. This catalyst shows increased catalyst life, increased selectivity for C2 - C3 olefins and decreased selectivity for paraffin production relative to the untreated molecular sieve.

Un tamis moléculaire de silicoaluminophosphate est traité par voie hydrothermique à des températures de plus de 700 °C pendant des périodes suffisantes pour détruire une importante proportion des sites acides, tout en conservant au moins 80 % de leur cristallinité, et former un catalyseur de conversion du méthanol en oléfines inférieures. Ce catalyseur offre une durée de vie supérieure, une sélectivité plus grande pour les oléfines C2-C3 et une sélectivité moindre pour la production de paraffines, comparativement au tamis moléculaire non traité.

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