Polyester production

Details Polyester production Polyester production

1976-11-15

1979-01-09

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

528273, 528283, 528309, C08G 6336

Patent

active

041338006

ABSTRACT:
Polyesters, e.g. polyethylene terephthalate, are produced by a direct esterification process. The esterification is performed in the presence of a germanium dioxide polycondensation catalyst dissolved in an alkaline ethylene glycol solution. The alkali in the catalyst solution acts as the softening point stabilizer. An antimony polycondensation catalyst is also employed.

REFERENCES:
patent: 3651017 (1972-03-01), Tanabe
patent: 3795639 (1974-03-01), Chimura

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