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1. (WO2013154968) USING NOVEL AMINES TO STABILIZE QUATERNARY TRIALKYLALKANOLAMINES

Pub. No.:    WO/2013/154968    International Application No.:    PCT/US2013/035575
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Tue Apr 09 01:59:59 CEST 2013
IPC: C07C 213/10
Applicants: HUNTSMAN PETROCHEMICAL LLC
Inventors: FERGUSON, Dave, C.
Title: USING NOVEL AMINES TO STABILIZE QUATERNARY TRIALKYLALKANOLAMINES
Abstract:
New stabilizers for solutions of choline hydroxide and related quaternary trialkylalkanolamines are disclosed. The stabilizers are alkyl hydroxylamines, hydrazines, hydrazides, or derivates thereof, including compounds containing more than one such functionality. The new stabilizers are effective at concentrations less than about 1000 ppm, and choline hydroxide solutions stabilized with the compounds described herein typically have Gardner Color change less than about 2.0 after six months at reasonable temperatures.