Ineos Olefins & Polymers UK, a subsidiary of Ineos AG, Rolle, Switzerland, has agreed to a contract to Linde AG subsidiary Selas-Linde GMBH, Pullach, Germany, to build a tenth furnace that will improve efficiency and increase production capacity of the existing Kinneil Gas cracker at the ethylene plant of its 10 million-tonne/year integrated refining and petrochemical complex in Grangemouth, Scotland.