Louisiana refineries still use hydrofluoric acid in the refinery alkylation process, as identified in PetroStrategies, Inc. article: 

http://www.petrostrategies.org/Learning_Center/hf_alkylation_concerns.htm

 

 

Louisiana	Chalmette - Chalmette	192,500	12,500
	ConocoPhillips - Belle Chase	247,000	38,000
	Marathon - Garyville	436,000	26,600
	Murphy / Valero - Meraux	125,000	8,500
	Placid - Port Allen	55,100	6,750

 

 

USW Study Warns Public about Dangers of Hydrofluoric Acid Use in Refinery Alkylation Process to Produce Clean-Burning Gasoline

 

http://www.usw.org/media_center/releases_advisories?id=0689