A process for catalytic dehydrogenation

Abstract

A process for catalytic dehydrogenation comprising mixing fluidization gas a fluidization gas which comprises methane, natural gas, ethane, hydrogen, nitrogen or any combination thereof with a fluidized catalyst stream that has passed through a catalytic dehydrogenation reactor and has exited a catalyst separation zone to form a catalyst recycle stream; and recycling the catalyst recycle stream either directly or indirectly into a catalytic dehydrogenation reactor is provided.

Description

[0001] Cross references to related applications [0002] This application claims priority to U.S. Provisional Application No. 62 / 333,313 filed on May 9, 2016, which is incorporated herein by reference in its entirety. Technical field [0003] The present disclosure relates to a method for catalytic dehydrogenation. Background technique [0004] It is known that a variety of lower olefins and dienes are widely used in a variety of chemical processes as starting materials and as intermediate products. In non-limiting examples, these may include ethylene, propylene, butene, isobutylene, and butadiene. Although olefins and diolefins may be by-products of some industrial processes, such as fluid catalytic cracking, the increased demand for olefins has prompted the development of "specialized" olefins and / or diolefins. One such "dedicated" method is the catalytic dehydrogenation of paraffins and / or other dehydrogenable hydrocarbons. [0005] In the process for catalytic dehydrogenation, ...

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Problems solved by technology

However, steam severely deactivates the catalyst at relevant temperatures, as Figure 9 can be seen in , which shows that the activity drops from 45% to 18%

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