| 摘要 |
A method for upgrading paraffinic naphtha to high octane fuel by contacting a feedstock, such as C7-C22 fresh virgin naphtha, with porous acid cracking catalyst under low pressure selective cracking conditions effective to produce C4 -C5 isoalkenes and C4-C5 isoalkanes. The preferred feedstock is straight run naphtha containing C7+ alkanes, at least 15 wt % C7+ cycloaliphatic hydrocarbons and less than 20% aromatics, which can be converted with a fluidized zeolite catalyst in a vertical riser reactor during a short contact period. The isoalkane products of cracking are dehydrogenated and etherified to provide high octane fuel components.
|
