Mesoporous zsm-22 for increased propylene production
AssigneeAlbemarle Corporation
InventorsAvelino Corma CANOS, Joaquin MARTINEZ-TRIGUERO
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Abstract
The present invention pertains to the use of mesoporous ZSM-22 zeolite in a process for the cracking or conversion of a feed comprised of hydrocarbons, such as, for example, that obtained from the processing of crude petroleum, to a mixture high in propylene. Further, the present invention concerns the field of fluid catalytic cracking (FCC) processes and relates to the preparation and employment of additives based on zeolites having increased mesoporosity, such as altered ZSM-22. More particularly the present invention discloses a process for improving the production of propylene in FCC units.
Claims14
An FCC additive comprising ZSM-22 zeolite wherein the zeolite has been treated to increase the mesoporosity of the zeolite as measured by Vmesopore (cm3/g).
Use of ZSM-22 zeolite wherein the zeolite has been treated to increase the mesoporosity of the zeolite as measured by Vmesopore (cm3/g) in a process of catalytic cracking organic compounds.
A process for producing propylene from a hydrocarbon feedstock, said process comprising the steps of:
- a. providing an FCC catalyst composition comprising a particulate, said particulate comprising ZSM-22 wherein the zeolite has been treated to increase the mesoporosity of the zeolite in the range of about 5 to about 50 wt %, based upon the weight of the particulate;
- b. contacting the FCC particulate catalyst composition with the hydrocarbon feedstock, at one or more temperatures in the range of about 400 to about 650° C., with a dwell time in the range of about 0.5 to about 12 seconds.
Dependencies are inferred from the claim text.