APPARATUS AND METHOD FOR CONTINUOUS POLYCONDENSATION

Japanese Patent JP3489382

B2

PROBLEM TO BE SOLVED: To provide an apparatus and method for polycondensation, suitable for continuously producing a polymer of high quality, by holding a liquid to be treated in the apparatus for a given time to move it virtually in piston flow state from the inlet to outlet, and by smoothly separating volatiles, e.g. ethylene glycol, formed while the liquid is held or moved.
SOLUTION: This apparatus is equipped with (A) a heat-exchanging section, comprising heat transfer tubes 4, in the lower section of the apparatus body 1, (B) a liquid-holding section, in which spiral baffles 5 are provided to send a liquid to be treated, held in the middle section of the body 1, successively upward, (C) a space 6 for vapor/liquid separation in the upper section of the body 1, and (D) a descending tube 3 which allows the liquid to flow vertically downward in films in the central section of the body 1. This design allows polycondensation reactions by moving the liquid, held in the apparatus for a given time, virtually in piston flow state from the inlet to outlet and smoothly separating volatiles, e.g. ethylene glycol, formed while the liquid is held or moved, to continuously produce a polymer of high quality.

Parent Oda
Hidekazu Nakamoto
Susumu Harada
Yasunari Sase
Hiroo Suzuki

JP6609397A

January 19, 2004

March 19, 1997

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株式会社日立製作所

B01J14/00; C08G63/78; C08G85/00; (IPC1-7): C08G85/00; C08G63/78

JP1192555A
JP60226526A
JP5559803A

【文献】米国特許5366667(US,A)
【文献】国際公開97/28886(WO,A1)

Yasuo Sakuta

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