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. 10, 2001
Filed:
Jan. 28, 2000
Kevin S. Plunkett, Walpole, MA (US);
V.I. Technologies, Inc., Melville, NY (US);
Abstract
This invention provides a method for synthesizing ethyleneimine dimer which includes reacting 2-(2-aminoethylamino)ethanol with an aqueous HX solution to produce N-(2-haloethyl)-1,2-ethanediamine dihydrohalide; reacting this product with a base in a solvent to convert the N-(2-haloethyl)-1,2-ethanediamine dihydrohalide into ethyleneimine dimer; and purifying the dimer from the solvent. This method of synthesis provides several advantages over previous methods: (1) The starting compounds are all relatively inexpensive; (2) the yield of the product is greater than 20% of the theoretical yield; and (3) the steps of the synthesis are easy, inexpensive and amenable to large-scale production. All of these advantages allow for less expensive production of ethyleneimine dimer.