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:
Sep. 25, 2012
Filed:
Dec. 10, 2009
William I. Harris, Midland, MI (US);
Dennis A. Keeley, Beaverton, MI (US);
Daryl J. Gisch, Midland, MI (US);
Marvin H. Tegen, Midland, MI (US);
James A. Jagodzinski, Midland, MI (US);
David C. Mcdonald, Midland, MI (US);
William I. Harris, Midland, MI (US);
Dennis A. Keeley, Beaverton, MI (US);
Daryl J. Gisch, Midland, MI (US);
Marvin H. Tegen, Midland, MI (US);
James A. Jagodzinski, Midland, MI (US);
David C. McDonald, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
The invention generally relates to amination reactions and amination reaction products, and particularly to methods for aminating vinyl aromatic polymers utilizing tertiary amines. In one embodiment, the invention includes conducting an amination reaction by combining a tertiary amine and a vinyl aromatic polymer comprising benzyl chloride groups to form a reaction mixture and maintaining the pH of the reaction mixture within a designated range. In another embodiment, the invention includes an aminated vinyl aromatic polymer. In yet another embodiment, the invention includes an ion exchange resin including quaternary ammonium functionality. The invention is useful in preparing ion exchange resins suitable for a variety of applications such as the removal of perchlorate ions from water sources and recovery of gold cyanide from mining leach solutions.