SYSTEMS AND METHODS FOR MAKING A MIDDLE DISTILLATE PRODUCT AND LOWER OLEFINS FROM A HYDROCARBON FEEDSTOCK

摘要

A system comprising a riser reactor for contacting a gas oil feedstock with a catalytic cracking catalyst under catalytic cracking conditions to yield a riser reactor product comprising a cracked gas oil product and a spent cracking catalyst; a separator for separating said riser reactor product into said cracked gas oil product and said spent cracking catalyst; a regenerator for regenerating said spent cracking catalyst to yield a regenerated catalyst; a intermediate reactor for contacting a gasoline feedstock with said regenerated catalyst under high severity conditions to yield a cracked gasoline product and a used regenerated catalyst; a first conduit connected to the intermediate reactor and the riser reactor, the first conduit adapted to send the used regenerated catalyst to the riser reactor to be used as the catalytic cracking catalyst; and a second conduit connected to the intermediate reactor and the regenerator, the second conduit adapted to send the used regenerated catalyst to the regenerator to yield a regenerated catalyst.