	US 12,351,538 B2
	Process for acid hydrolysis of pure polylaurolactam
Alexander Richter, Haltern am See (DE); Christian Nörnberg, Hamburg (DE); Norbert Kern, Haltern (DE); Florian Hermes, Haltern am See (DE); Franz-Erich Baumann, Duelmen (DE); Martin Roos, Haltern am See (DE); and Daniel Demicoli, Essen (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 18/245,317
Filed by Evonik Operations GmbH, Essen (DE)
PCT Filed Sep. 14, 2021, PCT No. PCT/EP2021/075148 § 371(c)(1), (2) Date Mar. 14, 2023, PCT Pub. No. WO2022/058291, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 20196421 (EP), filed on Sep. 16, 2020.
Prior Publication US 2024/0018092 A1, Jan. 18, 2024
Int. Cl. C07C 227/20 (2006.01); C07C 227/22 (2006.01)

CPC C07C 227/20 (2013.01) [C07C 227/22 (2013.01)]

10 Claims

1. A process for hydrolysis of polylaurolactam, the process comprising:

cleaving the polylaurolactam with sulfuric acid at a temperature of from 125° C. to 190° C., to give o-aminolauric acid.