Stripping Process with Multi-Sloped Baffles

A process for the stripping of entrained and/or adsorbed hydrocarbons from catalyst particles, wherein the entrained and/or adsorbed hydrocarbons are from the fluid catalytic cracking (FCC) of an FCC feed with a particulate material comprising an FCC catalyst, said process comprising:

• contacting an FCC feed with FCC catalyst to provide a mixture of FCC catalyst and FCC feed and to convert the FCC feed while depositing coke on the FCC catalyst;
• separating converted FCC feed from the FCC catalyst to produce a stream of separated catalyst particles containing hydrocarbons;
• passing the separated catalyst particle stream into a stripping vessel and passing the stream of catalyst particles downwardly over a plurality of baffles in the stripping vessel, at least some of the separated catalyst particles traveling down a first face of a first baffle at a first acute angle with respect to vertical and then traveling down a second face of said first baffle at a second acute angle with respect to vertical, said second acute angle being different from the first acute angle;
• discharging a stripping fluid upwardly through a plurality of openings in said baffles;
• recovering stripping fluid and stripped hydrocarbons that pass upwardly from the baffles;
• recovering stripped FCC catalyst passing downwardly from the baffles;
• passing stripped FCC catalyst to a regeneration vessel to remove coke from the FCC catalyst;
• and
• returning FCC catalyst from the regeneration vessel for contact with the FCC feed.

A process for the stripping of entrained and/or adsorbed hydrocarbons from catalyst particles, said process comprising:

• contacting catalyst particles with a hydrocarbon stream;
• disengaging hydrocarbons from the catalyst particles after contact with said hydrocarbon stream to produce a stream of spent catalyst particles containing entrained and/or adsorbed hydrocarbons;
• passing the spent catalyst particles downwardly over a pair of baffles defining a downcomer channel therebetween;
• at least some of the spent catalyst particles traveling down a first face of an first baffle and then traveling down a second face of said first baffle at an acute angle with respect to vertical, said second face extending toward said downcomer channel;
• recovering stripping fluid and stripped hydrocarbons from the baffles;
• and
• recovering stripped catalyst particles from said baffles.