Koppers Holdings and Rio Tinto Aluminium have agreed to a 42-month contract extension that began on January 1, 2011, and continues through June 30, 2014.
Under the terms of the agreement, Koppers will supply and transport liquid carbon pitch to Rio Tinto smelters in Australia at an estimated value in excess of $100 million.
Walter W. Turner, CEO of Koppers, said: "We are pleased to be able to continue our strong relationship with an important customer like Rio Tinto. The global aluminum industry is an important market for Koppers, and we are excited to share this growth opportunity with them.
Our global presence in this market also provides us with the capability to provide carbon pitch to other Rio Tinto facilities worldwide."