US propylene maker PetroLogistics has restarted its 1.2 bln lb propane dehydrogenation unit in Houston, Texas, after a brief shutdown, as per Platts. Low air supply to the waste heat boiler caused the unit to shut down Tuesday evening. The waste heat boiler supplies steam to the reactor booster compressor.
Petrologistics's PDH plant, billed as the largest in the world, has been beset with problems, mostly minor, since its delayed start-up in October, 2010. These interruptions have severely hampered Petrologistics' ability to impact the polymer-grade and chemical-grade propylene markets, which remain fundamentally tight and continue to see record-high prices as a result.