About Us

INEOS Joliet is a leading producer of chemical intermediates. At our site in Channahon, Illinois we produce three products - Purified Isophthalic Acid (PIA), Trimellitic Anhydride (TMA) and Maleic Anhydride (MAN).

Besides our markets in North and South-America, we serve customers on a global basis from our warehouses in Europe and Asia.

Our products are used in a wide range of applications. including PET packaging, unsaturated polyester resins (UPR), coating resins, plasticizers, copolymers, lubricants, and various other resin, ester, and specialty products.

INEOS is a customer-focused company. Its business mission is to be the supplier of choice to its customers.

Our History

  • Amoco began development in 1957 with oxidation processes to produce dimethyl terephthalate and phthalic anhydride.
  • Oxidation technology to produce terephthalic acid was developed and expanded in the 1960s and the first commercial purified terephthalic acid (PTA) unit in the world was built in 1965.
  • A dedicated trimellitic anhydride unit started operation in 1969.
  • In the mid-1970s a maleic anhydride unit was constructed and isophthalic acid production was campaigned in the oxidation unit.
  • Amoco produced the first commercial purified isophthalic acid (PIA) in 1985 and the PTA unit was converted to full time PIA in 1992.
  • The 1990s also saw the expansion of both PIA and TMA capacities, the addition of anaerobic waste water treatment facility, and the addition of a butane pipeline to eliminate the trucking of butane to the MAN unit.
  • PIA production capability became the largest in the world with the  1998 expansion.