Patent ID: 10227271

Abstract:
An integrated process, suitable for use in a new or retrofitted plant, produces an olefin or di-olefin via the dehydrogenation of an appropriate C3-C4 hydrocarbon feed includes (1) contacting the feed and a dehydrogenation catalyst having a Geldart A or Geldart B classification in a fluidized bed at a temperature from 550° C. to 760° C. and a pressure from about 41.4 to about 308.2 kPa (about 6.0 to about 44.7 psia) and a catalyst to feed ratio, w/w, from 5 to 100 to form a dehydrogenate product; separating the dehydrogenate product and unreacted starting feed mixture from a portion of the catalyst by means of a cyclonic separation system; reactivating the catalyst in a fluidized regenerator by combustion at 660° C. to 850° C., followed by contact with an oxygen-containing fluid at 660° C. or greater, and returning the catalyst to the dehydrogenation reactor; (2) compressing the product mixture to form a compressed product mixture; and (3) fractionating the compressed product mixture to form a product stream including at least the target olefin or di-olefin. The integrated process offers increased plant capacity, improved economics, and reduced environmental impact in comparison with other known and conventional processes.