Catalyst regeneration process

B - Operations – Transporting – 01 – J

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Details

B01J 29/40 (2006.01) B01J 29/80 (2006.01) B01J 29/89 (2006.01) B01J 29/90 (2006.01) B01J 38/10 (2006.01) B01J 38/12 (2006.01)

Patent

CA 2554459

Used noble metal-containing titanium zeolite catalysts, that have been employed in the liquid-phase epoxidation of olefins with hydrogen and oxygen in the presence of a buffer, are regenerated by heating the used catalyst at a temperature of at least 250 ~C in the presence of a oxygen-containing gas stream, followed by reduction at a temperature of at least 20 ~C in the presence of a hydrogen-containing gas stream to form a reactivated catalyst.

Selon l'invention, des catalyseurs à base de zéolithe de titane contenant un métal noble usagés, qui ont été utilisés dans l'époxydation en phase liquide d'oléfines avec de l'hydrogène et de l'oxygène, en présence d'un tampon, sont régénérés par chauffage à une température d'au moins 250 ·C, en présence d'un flux gazeux contenant de l'oxygène, puis par réduction à une température d'au moins 20 ·C, en présence d'un flux gazeux contenant de l'hydrogène, ce qui permet d'obtenir des catalyseurs réactivés.

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