| 摘要 |
<p>Oligocracking of a light olefinic hydrocarbonated charge (I), for the preparation of propylene, comprises allowing (I) to circulate in a cross-flow; continuously or discontinuously drawing out a flow of used catalyst (II); recycling a primary fraction of the used (II); transferring the complementary fraction of used (II) into a zone of regeneration; and reintroducing the fraction of regenerated (II) into the upper section of the reactor. Process of oligocracking of light olefinic hydrocarbonated charges (I) comprising 2-12C (preferably 4-12C) hydrocarbons, for the preparation of propylene, comprises allowing (I) to circulate in a cross-flow, compared to the catalyst (II), in a radial reactor functioning in a fluidized bed; continuously or discontinuously drawing out a flow of used (II) at the lower section of the reactor; recycling a primary fraction of the used (II) at the head of the rector; transferring the complementary fraction of used (II) into a regeneration zone, where it is subjected to at least one stage of controlled oxidation; and reintroducing the fraction of regenerated (II) in mixture with the primary fraction of used (II) into the upper section of the rector, where the supported (II) comprises at least a zeolite (MEL, MFI, NES, EUO, FER, CHA, MFS and/or MWW, or NU-85, NU-86, NU-88 and/or IM-5) having a selectivity form, and silicon/aluminium ratio of 50-1200).</p> |
