IP Library › Granted Patent US 7,425,652
Granted Patent B2
US 7,425,652 · App. 11/190,321 · Granted Sep 16, 2008

Preparation of alkanolamines

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Quick Facts
Patent No.
US 7,425,652
App. No.
11/190,321
Filed
Jul 27, 2005
Granted
Sep 16, 2008
Kind
B2
Art Unit
1796
USPC
564/2
Abstract

Alkanolamine compositions are disclosed. The composition comprises an alkanolamine and hydroxylamine or hydrazine. Preferred alkanolamine includes diethanolamine, triethanolamine, and mixtures thereof. The composition of the invention has significantly reduced discoloration.

Claims (3)

1. A composition consisting of an alkanolamine and a hydroxylamine, wherein hydroxylamine is present in an amount sufficient to stabilize the color of alkanolamine within the range of 100 ppm to 1000 ppm of the composition.

2. The composition of claim 1 , wherein the alkanolamine is selected from diethanolamine, triethanolamine, or mixtures thereof.

3. The composition of claim 1 , wherein the alkanolamine is triethanolamine.