Evonik Industries is expanding its capacities for refinement fumed silica in Rheinfelden, Germany, and will invest an amount in the “low double-digit million euro range” to expand the facility.    Expansion of the site, which further processes hydrophilic silica to a hydrophobic variety, is scheduled to become operational in late 2020. The investment will expand the company’s annual capacity for hydrophilic fumed silica at the existing Rheinfelden site by 20% to meet heavy market d...