The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2019
Filed:
May. 01, 2017
Applicant:
Huntsman Petrochemical Llc, The Woodlands, TX (US);
Inventor:
Dave C Ferguson, Spring, TX (US);
Assignee:
HUNTSMAN PETROCHEMICAL LLC, The Woodlands, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
A01N 25/22 (2006.01); A01N 25/32 (2006.01); C07C 215/40 (2006.01); C09K 15/18 (2006.01); C07C 213/10 (2006.01); C07C 213/04 (2006.01); C09K 15/20 (2006.01); C09K 15/22 (2006.01);
U.S. Cl.
CPC ...
A01N 25/22 (2013.01); A01N 25/32 (2013.01); C07C 213/04 (2013.01); C07C 213/10 (2013.01); C07C 215/40 (2013.01); C09K 15/18 (2013.01); C09K 15/20 (2013.01); C09K 15/22 (2013.01);
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.