Gleiss Lutz, Shearman & Sterling and Simpson Thacher & Bartlett have landed key advisory roles on The Blackstone Group’s e3.1bn (£2.15bn) purchase of Celanese, Germany’s largest ever public-to-private deal.

The deal sees the US private equity house acquire the chemical company Celanese in a voluntary takeover, priced at e32.5 (£22.6) per share, through the vehicle BCP Crystal Acquisition.