Process for the separation and purification of acetylene from gases obtained by pyrolysis of hydrocarbons

Claim 1

IN A PROCESS FOR THE SEPARATION AND PURIFICATION OF ACETYLENE FROM A MIXTURE OF GASES OBTAINED BY PYROLYSIS OF HYDROCARBONS WHEREIN THE PYROLYSIS GAS IS CONTACTED WITH LIQUID AMMONIA FOR SELECTIVE DISSOLUTION OF ACETYLENIC GASES CONTAINED IN SAID GAS MIXTURE, THEREBY LEAVING A RESIDUE OF COOLED UNDISSOLVED GASES, THE IMPROVEMENT WHICH COMPRISES SCRUBBING SAID PYROLYSIS GAS MIXTURE WITH A LOW MELTING SELECTIVE SOLVENT FOR AROMATIC HYDROCARBONS AND ACETYLENE HOMOLOGUES CONTAINED IN SAID PYROLYSIS GAS PRIOR TO SAID CONTACT WITH LIQUID AMMONIA AND SELECTED FROM THE GROUP CONSISTING OF METHANOL, ACETONE, DIMETHYLFORMAMIDE, BUTYROLACTONE, AND MIXTURES THEREOF.