Using novel amines to stabilize quaternary trialkylalkanolamines
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United States of America Patent
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Jun 6, 2017
Grant Date -
Jan 29, 2015
app pub date -
Apr 8, 2013
filing date -
Apr 13, 2012
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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.
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