one of the ethylene processes using propane as a feedstock with front$-$end deethanization and front$-$end acetylene hydrogenation was presented as the preliminary design example in this chapter. for the product separation section for the base$-$case design, shown in fig. $3-13,$ com?plete the material balance around each piece of equipment shown. the feed in kg$/$h for the c$2$ splitter and the depropanizer column are as follows: