Hydrogenation of acetylenes in a hydrocarbon stream

A process for selective hydrogenation of acetylenes comprising:

• directing a C3-C10 hydrocarbon stream to a debutanizer;
• condensing a debutanizer C3-C4 overhead stream;
• selectively hydrogenating C4 acetylenes in the condensed C3-C4 overhead stream in a C4 acetylene hydrogenation reactor to give a reactor outlet stream;
• directing the reactor outlet stream to a depropanizer downstream from the debutanizer;
• drawing a top stream from the depropanizer containing a C3 mixture comprising methyl acetylene and propadiene;
• drawing a bottom stream from the depropanizer containing a crude C4 mixture;
• directing the C3 mixture to a methyl acetylene and propadiene (MAPD) reactor and selectively hydrogenating the methyl acetylene and propadiene to give a crude propylene stream;
• and
• directing the crude propylene stream to a stripper column to vent off residual unreacted hydrogen.