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1. (WO2018085618) METHOD OF MAKING ACRYLIC ACID FROM HYDROXYPROPIONIC ACID

Pub. No.:    WO/2018/085618    International Application No.:    PCT/US2017/059853
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Sat Nov 04 00:59:59 CET 2017
IPC: C07C 51/04
C07C 51/377
C07C 59/08
Applicants: THE PROCTER & GAMBLE COMPANY
Inventors: COLLIAS, Dimitris, Ioannis
GODLEWSKI, Jane, Ellen
VELASQUEZ, Juan Esteban
Title: METHOD OF MAKING ACRYLIC ACID FROM HYDROXYPROPIONIC ACID
Abstract:
Methods for making acrylic acid, acrylic acid derivatives, or mixtures thereof by contacting a stream containing hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof with either an active catalyst containing an amorphous and partially-dehydrated phosphate salt or a precursor catalyst containing a crystalline phosphate salt in a reactor with a low corrosion rate are provided.