Engineering Sustainability® brand for Proabd® CTD Flex+®


On January 28th, 2016, the Engineered Sustainability® brand was granted to Proabd® CTD Flex+®, the pioneering technology for Coal Tar Distillation (CTD).

The Fives’ Engineered Sustainability® program is a demanding and long-term eco-design process, and leads to branding solutions which offer high levels of operational and environmental performance, with the Engineered Sustai¬nability® brand. The eco-design methodology comprehensively covers all the sustainable development aspects of the process plant over the whole life cycle.

Fives Proabd’s teams were mobilized to search for the best possible combination between enhanced environmental performance, ease of use and minimum operating costs – while maintaining optimum quality for each final product.

Proabd® CTD Flex+® is an evolution of the previous Proabd’s CTD technology, that has been implemented since 1990, and was developed to address the new challenges of the tar and carbon industries. It is the result of a continuous improvement process carried out since 2012, which is based on customers‘ feedback and supported by dedicated R&D efforts. The core of Proabd® CTD Flex+® is a primary distillation system, that is able to directly split coal tar into three main marketable products: Chemicals Oils Fraction, Carbon Black Oil (CBO) and Pitch. The main objective was to engineer a distillation process allowing for an easy and rapid adjustment of the end product mix, that would allow Fives’ customers to keep their operating profit maximized throughout changing market conditions. 

The eco-design studies, which started in May 2014, revealed that Proabd® CTD Flex+® offers various advantages com¬pared to other existing technologies:

  • High flexibility thanks to the possible shift from full chemical oils to CBO mix regime easily in a couple of hours and without additional energy consumption
  • High pitch quality for a broad range of softening points at commercial scale (90 to 145°C Mettler) without optical mesophase
  • High energy efficiency with up to 25% saved fuel at identical pitch quality and up to 40% reduced electrical power consumption
  • Optimal investment with up to 40% lower CAPEX based on steel employment