Patent ID: 8932456
Filing Date: 2015-01-13
Classification: C01B,C01C,C07C,C10G,Y02P

Abstract:
1. An integrated process for production of light olefins and intermediates for production of ammonia and urea, comprising: (a) feeding a feedstock of hydrocarbons from petroleum refining to an FCC converter to place the feedstock in contact with a catalyst containing alumina and zeolite in a fluidized bed reactor in order to obtain a flow of light hydrocarbons, (b) separating the light hydrocarbon products and deactivated catalyst on leaving the reactor, (c) delivering the deactivated catalyst to a rectification zone, from there to a regenerator and burning off coke deposited on the catalyst with a mixture of O (d) delivering a flow of N (e) recovering a flow of CO (f) recovering the flow of light hydrocarbons obtained in the FCC reactor and separating it into other flows, including a first flow comprising hydrogen and hydrocarbons in the range from C1 to C2 (fuel gas), a second flow comprising hydrocarbons in the range from C3 to C4 (LPG) and a third flow comprising hydrocarbons with 5 or more carbon atoms having a boiling point below 220° C. (naphtha), (g) recovering a fraction corresponding to ethene from the flow comprising fuel gas and a fraction corresponding to propene from the flow comprising LPG, the ethene and the propene being the end products, (h) delivering the flows of fuel gas without ethene and LPG without propene and/or naphtha obtained in the FCC to a unit for the generation of hydrogen which comprises a steam reforming unit to obtain a flow of hydrogen and another of CO (i) delivering the flow of hydrogen obtained in the hydrogen generating unit to an ammonia production unit, and (j) delivering the flow of carbon dioxide obtained in the steam reforming unit to a urea production unit.