Pyrolysis method and system for recycled waste

A method of making a pyrolysis oil, said method comprising:

• a) providing a plastic-containing feed comprising at least one halogen-containing waste plastic;
• b) dehalogenating at least a portion of said plastic-containing feed in a pretreatment unit to thereby form a halogen waste stream and a dehalogenated feed, wherein the dehalogenating comprises physically separating solid halogen-containing waste plastic from at least one other type of waste plastic upstream of a pyrolysis unit;
• and
• c) pyrolyzing at least a portion of said dehalogenated feed to thereby form a pyrolysis effluent comprising a pyrolysis oil, wherein said pyrolysis oil:
• i.) comprises an aromatic content of less than 25 weight percent,
• ii.) comprises an alkane content of at least 25 weight percent,
• iii.) comprises a 90% boiling point of at least 350° C.;
• and
• iv.) exhibits a density at 15° C. of less than 0.9 g/cm3,
• wherein said dehalogenating of step (b) comprises pretreating said plastic-containing feed by heating to a temperature in a range from at least 150° C. and not more than 325° C. for a time sufficient to remove at least 5 percent of the halogen originally present in the plastic-containing feed and thereby release a halogen-containing waste stream and form a dehalogenated feed having a halogen content of not more than 1000 ppm,
• wherein said pyrolyzing of step (c) occurs at a temperature of at least 450° C. and not more than 1100° C., and
• wherein the pyrolysis oil is not hydrotreated.