(Bloomberg) -- Ineos Group Holdings Plc reported an upset with a demethanizer tower in the olefins unit 1 at its Chocolate Bayou chemical site in Alvin, Texas, according to a filing with state regulators. Emissions associated with the flaring began today at 5 a.m. local time and lasted for seven hours, the Lyndhurst, U.K.-based company said in the report to the Texas Commission on Environmental Quality.
Ineos was ⌠stabilizing the unit to bring ethylene product back on spec and decreased feed to the furnaces, according to the filing.
⌠Operations are normal at Chocolate Bayou, Charles Saunders, a company spokesman based in League City, Texas, said in an e-mail.
The Chocolate Bayou plant includes two olefins units and has one of the largest hydrocarbon crackers in the U.S., according to the company website. The plant is about 45 miles (72 kilometers) south of Houston.