Evonik Industries has started up new production plants for C4-based products in the Marl Chemical Park, Germany.   This expansion of production in Marl is part of a capacity expansion throughout Europe for C4-based products, in which Evonik has invested a three-digit million euro amount in total.   At the heart of the new plants at Evonik’s largest site is the widely visible 90-meter column, the highest within the specialty chemicals company. This is a symbol of a new technology that, for th...