The Avantium Renewable Polymers subsidiary of Dutch technology firm Avantium has signed a letter of intent to locate its flagship plant at Chemie Park Delfzijl in the Netherlands. The 5,000-tonne facility will produce plant-based FDCA (furandicarboxylic acid), which is a key building block for many chemicals and plastics such as PEF (polyethylene furanoate). Avantium Renewable…