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:
Jun. 08, 2010
Filed:
Mar. 24, 2006
Peter D. Phelps, Williamstown, MA (US);
Jimmy Lynn Webb, Ballston Lake, NY (US);
David Patrick Phelon, Albany, NY (US);
Paul M. Andrusyszyn, Troy, NY (US);
Peter D. Phelps, Williamstown, MA (US);
Jimmy Lynn Webb, Ballston Lake, NY (US);
David Patrick Phelon, Albany, NY (US);
Paul M. Andrusyszyn, Troy, NY (US);
Cyclics Corporation, Schenectady, NY (US);
Abstract
The invention relates to methods and systems for selective removal of catalyst residue from a depolymerization product stream without a water quench, as well as methods and systems for subsequent recovery of residual linear oligomer. The substantially metal-free and substantially water-free residual oligomer byproduct can then be advantageously used as recyclate in a process for preparing MPO. For example, the residual oligomer recyclate can be used as a reactant in the polymerization and subsequent depolymerization (cyclization) of low-acid polyester to form MPO.