Patent ID: 8354065
Filing Date: 2013-01-15
Classification: B01J

Abstract:
1. A fluidized bed catalytic cracking apparatus (FCC) for treating gaseous hydrocarbons from a cracking catalyst, the apparatus comprising: i) a catalyst regenerator for regenerating catalyst by contact with oxygen containing gas to produce regenerated catalyst; ii) a standpipe for recycling the regenerated catalyst from the catalyst regenerator to a cracking zone; iii) a stripping means for stripping inert gases from the regenerated catalyst as the catalyst flows from the regenerator; iv) a riser for receiving the stripped catalyst; and v) a FCC catalyst charge heater for preheating FCC feedstocks; vi) wherein the FCC catalyst charge heater is a catalyst cooler; vii) wherein the FCC catalyst charge heater is used in conjunction with an FCC catalyst heater in the regenerator; and viii) wherein stripping steam is used to control the heat transfer coefficient of the catalyst charge heater to achieve the desired feed temperature.