Construction is currently underway on the new unit, which is scheduled to become operational in late 2016.

Upon completion of the expansion, the plant’s current annual production will neary double with an additional 50 million pounds capacity.

When operational, the unit is expected to become one of the world’s largest on-purpose TEG production units, the company said.

LyondellBasell intermediates and derivatives, supply chain and procurement executive vice-president Pat Quarles said: "The long-term demand for Tri-ethylene Glycol in oil-field, construction and automotive markets in North America, along with the company’s feedstock integration to ethylene and ethylene oxide, makes this project a logical extension of our high-value glycol derivative businesses."

TEG is a colorless, odorless glycol that is used to dehydrate natural gas and as an additive in hydraulic and brake fluids, among other uses.

The Bayport Underwood plant currently produces ethylene oxide, ethylene glycol, glycol ethers and other products.