Propene (C3H6) Posted on 14th December 201511th May 2021 by ThePD (The Project Definition) Propene (C3H6) refers to the Propylene. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Substance and tagged petrochemical. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.