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:
Mar. 20, 2012
Filed:
Jun. 11, 2008
Robert A. Grigsby, Jr., Spring, TX (US);
Robert L. Zimmerman, Austin, TX (US);
Robert A. Grigsby, Jr., Spring, TX (US);
Robert L. Zimmerman, Austin, TX (US);
Huntsman Petrochemical LLC, The Woodlands, TX (US);
Abstract
A process for the separation of a first amine having a tertiary amine group and a secondary amine group such as N,N,N'-trimethylbis(aminoethyl)ether from a di-tertiary amine such as N,N,N′,N′-tetramethylbis(aminoethyl)ether, comprising: contacting a mixture of the first amine and the di-tertiary amine with a carbonyl compound capable of forming an enamine such that the carbonyl compound reacts with the first amine to form an enamine; separating the enamine from the di-tertiary amine; and subsequently converting the enamine to the first amine.