Emanuele Paternò, 9th Marquess of Sessa was an Italian chemist and politician and is credited with the discovery of the Paternò–Büchi reaction.

He was born in Palermo in 1847 as the Marquess of Sessa, in a branch of the House of Paternò.

In 1871 he became a lecturer at the University of Torino, but returned to Palermo the following year as Cannizzaro's successor.

He served as the Mayor of Palermo (1890–1892), and in 1890 he was appointed by King Victor Emmanuel III a member of the Senate of the Kingdom of Italy.

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