Selective vaporization process and apparatus

Details Selective vaporization process and apparatus Selective vaporization process and apparatus

C - Chemistry, Metallurgy

10

G

196/208

C10G 25/09 (2006.01)

Patent

CA 1181026

ABSTRACT A selective vaporization process is conducted by contacting a heavy charge stock such as whole crudes, topped crudes, resids and the like with an inert, finely divided solid material in a confined vertical column under conditions to deposit heavy components of high CC and/or metal content on the solid and vaporize other components of the charge. This results from temperatures high enough to cause the desired vaporization and very short hydrocarbon residence times to avoid substantial cracking. The operation is thus held to a low cracking severity to accomplish the desired purpose of separating vaporizable, more valuable components from those which are regarded as contaminants. Steam, light hydrocarbons or the like are added to the rising confined column in the selective vaporization facility to reduce partial pressure of hydrocarbons in the charge and thus aid in vaporization. Vaporous hydrocarbons are separated at the top of the column from inert solids bearing the unvaporized components as a deposit thereon. The vapors are promptly cooled to a temperature below that at which substantial thermal cracking occurs and processed as desired in a catalytic cracker or the like.

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