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:
Jan. 26, 2021
Filed:
Mar. 11, 2019
Sabic Global Technologies B.v., Bergen op Zoom, NL;
Husnu Alp Alidedeoglu, Newburgh, IN (US);
Prashant Kumar, Evansville, IN (US);
Brian Bougher, Evansville, IN (US);
Cornelis Adrianus Maria van Gool, Kapellen, BE;
Sasi Sethumadhavan Kannamkumarath, Evansville, IN (US);
Bing Zhou, Evansville, IN (US);
SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom, NL;
Abstract
A device for making polybutylene terephthalate includes (1) a slurry paste vessel; (2) a tower reactor to which a mixture of 1,4-butane diol and terephthalic acid from vessel (1) is supplied, the tower reactor having a plurality of reactor zones wherein the lower third of the tower reactor is in the form of a hydrocyclone with attached heat exchanger, and the hydrocyclone has a supply line from vessel (1), the hydrocyclone being connected to the top side of the tower reactor; (3) a first continuously stirred tank reactor to which the product from tower reactor (2) is supplied; (4) an optional second continuously stirred tank reactor to which the product from (3) is supplied; (5) a dual shaft ring reactor to which the product from stirred tank reactor (3) or (4), is supplied; and (6) a pelletizer where the product from dual shaft ring reactor (5) is continuously fed and pelletized.