Recovery of heat and vaporized material from a reaction effluent

A process for cooling a gaseous reaction effluent containing volatized catalyst and withdrawn from a reaction system employing a solid catalyst, comprising:

• contacting the gaseous reaction effluent with solid catalyst particles by suspending the solid catalyst particles in flowing gaseous reaction effluent to provide dilute phase transport contact, said solid catalyst particles being at a temperature at which vaporized catalyst condenses from the gas onto the solid catalyst particles, said solid catalyst particles being heated and said gaseous reaction effluent being cooled by said contact;
• separating gaseous reaction effluent from the solid catalyst particles;
• cooling separated solid catalyst particles in a fluidized bed, said fluidized bed being fluidized by a fluidizing gas, said particles being cooled in the fluidized bed to a temperature at which vaporized salt condenses onto the solid particles, said fluidizing gas being a feed gas to the reaction system and being introduced into the reaction system subsequent to use thereof as the fluidizing gas;
• and
• employing cooled solid catalyst particles for contacting the gaseous reaction effluent.