Production process and production apparatus for polybutylene...

Details Production process and production apparatus for polybutylene... Production process and production apparatus for polybutylene...

2007-02-20

2007-02-20

Caldarola, Glenn (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

With means applying electromagnetic wave energy or...

C422S198000, C422S205000, C422S215000, C422S224000, C422S225000

Reexamination Certificate

active

10786009

ABSTRACT:
An apparatus for continuously producing polybutylene terephthalate, which comprises a first reactor for reacting an aromatic dicarboxylic acid with a glycol, thereby producing an oligomer, a second reactor for polycondensating the oligomer, thereby preparing a low polymerization product, and a third reactor for further polycondensating the low polymerization product, thereby producing a high molecular weight polyester, where the second reactor is a vertical, cylindrical polymerization vessel having a plurality of concentrical partitioned reaction compartments therein, each of the reaction compartments being provided with stirring blades and a heater, and an outlet for volatile matters being provided at the upper part of the vessel. The second reactor contributes to efficient and continuous production of polybutylene terephthalate having a good quality.

REFERENCES:
patent: 1667838 (1928-05-01), Buchanan
patent: 3322505 (1967-05-01), Weber
patent: 4680376 (1987-07-01), Heinze et al.
patent: 4769139 (1988-09-01), Noguchi et al.

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