A new C4 plant came on stream in Antwerp in 2002. This plant manufactured products based on C4 raw materials, namely dibutene and MTBE, which were used as chemical intermediates. With production facilities in Marl and Antwerp they had an integrated C4 production with modern methods based on own knowhow. As of 01.07.2023 they are operational under the name Evonik Oxeno Antwerpen NV.