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:
Oct. 07, 2008
Filed:
Feb. 23, 2000
Hidekazu Nakamoto, Kudamatsu, JP;
Susumu Harada, Kudamatsu, JP;
Chikao Oda, Kudamatsu, JP;
Yasunari Sase, Kudamatsu, JP;
Michio Suzuki, Kudamatsu, JP;
Hidekazu Nakamoto, Kudamatsu, JP;
Susumu Harada, Kudamatsu, JP;
Chikao Oda, Kudamatsu, JP;
Yasunari Sase, Kudamatsu, JP;
Michio Suzuki, Kudamatsu, JP;
Hitachi Plant Technologies, Ltd., Tokyo, JP;
Abstract
An apparatus for continuously producing polyester comprises three single reactors, i.e. a single esterification reactor (first reactor), a single initial polymerization reactor (second reactor) and a single final polymerization reactor (third reactor or final polymerizer), where at least one of the first reactor and the second reactor is free from an external stirring power source, or the third reactor is a horizontal, one-shaft-type, low speed rotation type reactor. Necessary number of reactors for the esterification and polycondensation reactions can be a minimum and necessary stirring power consumption for the reaction can be a minimum, and thus polyester polymers of good quality can be efficiently produced at a minimum energy cost in a necessary minimum reactor structure.