Hydrocarbon conversion apparatus including fluid bed reaction vessel and related processes

A hydroprocessing conversion process carried-out utilizing a hydrocarbon conversion apparatus including a reaction vessel having a reaction chamber and a feed distribution chamber, a riser fluidly coupling the feed distribution chamber to the reaction chamber, and a catalyst recirculation standpipe fluidly coupling the reaction chamber to the feed distribution chamber, the hydroprocessing conversion process comprising:

• injecting a feed stream into the feed distribution chamber;
• contacting the feed stream with a recirculated catalyst within the feed distribution chamber;
• conducting the feed stream and the catalyst from the reaction chamber, through the riser, and into the reaction chamber;
• and
• returning to the feed distribution chamber through the catalyst recirculation standpipe, the steps of contacting, conducting, and returning performed repeatedly to circulate the catalyst within the reaction vessel.