Title:
METHOD AND APPARATUS FOR PRODUCING POLYESTER
Document Type and Number:
Japanese Patent JP3722138
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a continuous production method for polyethylene terephthalate wherein the number of reactors necessary for reaction is made minimal and the power consumption for agitation necessary for reaction are minimized by providing a production method and apparatus whereby a high-quality polyester is efficiently produced by using three reactors.
SOLUTION: The polyester production apparatus has three reactors: an esterification reactor, an initial polymerization reactor, and a final polymerization reactor. Both the esterification reactor and the initial polymerization reactor are not equipped with an external power source for agitation. The final polymerization reactor is of a horizontal single-shaft low-speed-rotating type. Such a necessary and minimum reactor constitution enables a high-quality polyester to be efficiently produced at a minimum energy cost.
Inventors:
Hidekazu Nakamoto
Susumu Harada
Yasunari Sase
Sorao Suzuki
Oda parent student
Susumu Harada
Yasunari Sase
Sorao Suzuki
Oda parent student
Application Number:
JP2003322375A
Publication Date:
November 30, 2005
Filing Date:
September 16, 2003
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
C08G63/80; C08G63/78; C08G85/00; (IPC1-7): C08G63/78; C08G85/00
Domestic Patent References:
| JP10316747A | ||||
| JP9003200A |
Attorney, Agent or Firm:
Yasuo Sakuta