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. 09, 2021
Filed:
Nov. 30, 2018
Uop Llc, Des Plaines, IL (US);
Jan De Ren, Antwerp, BE;
Stephan Dietmer Wilhelmi, Bergisch Gladbach, DE;
Roel Julia Julien Bauters, Antwerp, BE;
UOP LLC, Des Plaines, IL (US);
Abstract
The present subject matter claims a process and apparatus for forming, crystallizing and increasing the molecular weight of polymer particles which does not require re-heating the polyethylene terephthalate (PET) pellets after they are cut and crystallized in the under water cutting (UWC) section. In the existing solid state polycondensation (SSP) technologies where an UWC is used, high crystallinity of the PET pellets can occur, by cooling and re-heating the PET pellets, which results in reduced removal efficiency of by-products, such as acetaldehyde (AA) and furthermore also a reduction of the reaction rates of molecular weight increasing reactions.