초록

Catalyst/oil mixing in a catalytic cracking unit can be effected at approximately right angles by introducing the liquid oil axially into the mouth of the riser and bringing the catalyst radially inwardly into the mouth of the riser from substantially the entire circumference thereof.

대표청구항 ▼

A catalytic cracking process comprising (a) flowing a stream of hot cracking catalyst particles longitudinally through at least a portion of a lift pot in an annular stream around a plug which is positioned in the lift pot and which has an upstream end, a downstream end and a longitudinal axis, the

A catalytic cracking process comprising (a) flowing a stream of hot cracking catalyst particles longitudinally through at least a portion of a lift pot in an annular stream around a plug which is positioned in the lift pot and which has an upstream end, a downstream end and a longitudinal axis, the hot cracking catalyst particles then flowing generally radially inwardly toward the plug axis past the downstream end of the plug, and then longitudinally into a riser-reactor; (b) introducing an oil feedstock into the stream of hot cracking catalyst particles as it is moving radially inwardly from around the periphery of the downstream end of the plug for the formation of a reaction mixture with said hot cracking catalyst, wherein the hot catalyst particles and the oil feedstock are moving at approximately right angles to each other at the point at which the oil feedstock is introduced; and (c) flowing the reaction mixture through the riser-reactor and into a disengagement chamber, the mixture flowing into the disengagement chamber comprising cracked oil product and catalyst particles.