Provided is a process for cracking a hydrocarbon feedstock. The process having the steps of (a) continuously passing the feedstock through a vapor-liquid separator in which the feedstock is separated into a volatile stream and a non-volatile stream; (b) continuously passing the non-volatile stream to a cracker; and (c) continuously recycling a portion of the volatile stream to the feedstock. There is also an apparatus for cracking a hydrocarbon feedstock.