METHODS AND SYSTEMS TO IMPROVE LIGHT OLEFIN YIELD AND FEEDSTOCK UTILIZATION FROM C5 RAFFINATE STREAMS

原文（中国語）

Systems and methods for producing light olefins from a natural gas liquid (NGL) or other C5 stream are provided. The method may include supplying a NGL or other C5 stream to a reverse isomerization unit to produce a n-pentane enriched NGL stream and supplying the n-pentane enriched NGL stream to a liquid furnace to produce a pyrolyzed product stream. The method may also include separating the C2 hydrocarbons, the C3 hydrocarbons, the C4 hydrocarbons, the C5 hydrocarbons, and the C6+ hydrocarbons in the pyrolyzed product stream in a separation train and supplying the separated C5 hydrocarbons, or a portion thereof, to a hydrogenation reactor to produce a saturated C5 hydrocarbon stream, followed by recycling the saturated C5 hydrocarbon stream to the reverse isomerization unit.