US 12,344,581 B2
Antifoulant compositions for high-severity processing of vinylic monomer streams
Jonathan Masere, Richmond, TX (US); Zhenxing Xi, Katy, TX (US); Pedro Carvalho Campos, Perre (PT); David Dixon, Baton Rouge, LA (US); Gregory Appel Melancon, Jr., Baton Rouge, LA (US); and Ramon Colorado, Jr., Stafford, TX (US)
Assigned to ECOLAB USA Inc., St. Paul, MN (US)
Filed by ECOLAB USA INC., St. Paul, MN (US)
Filed on Mar. 28, 2023, as Appl. No. 18/191,225.
Claims priority of provisional application 63/326,373, filed on Apr. 1, 2022.
Prior Publication US 2023/0312440 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 7/20 (2006.01); C07C 51/50 (2006.01); C07C 67/62 (2006.01); C07C 211/51 (2006.01); C07D 221/00 (2006.01); C07C 11/167 (2006.01); C07C 11/18 (2006.01); C07C 13/15 (2006.01); C07C 15/46 (2006.01); C07C 57/04 (2006.01); C07C 69/15 (2006.01)
CPC C07C 7/20 (2013.01) [C07C 51/50 (2013.01); C07C 67/62 (2013.01); C07C 211/51 (2013.01); C07D 221/00 (2013.01); C07C 11/167 (2013.01); C07C 11/18 (2013.01); C07C 13/15 (2013.01); C07C 15/46 (2013.01); C07C 57/04 (2013.01); C07C 69/15 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A composition for inhibiting monomer polymerization consisting essentially of:
a first inhibitor compound comprising a stable nitroxide radical; and
a second inhibitor compound comprising a phenylenediamine.