Separating vaporous reaction product in the production of polyes

Details Separating vaporous reaction product in the production of polyes Separating vaporous reaction product in the production of polyes

1975-02-27

1977-03-08

Tillman, Murray

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

203 91, 203DIG14, C08G 6322

Patent

active

040112020

ABSTRACT:
A process for the production of linear fiber-forming polyesters, especially polyethylene terephthalate, wherein vaporous reaction products are separated in an improved manner by suction withdrawal from the polymerization reactor through the action of a fluid vacuum jet or aspirator which is supplied with recirculated glycol vapor as the propellant or jet fluid for the aspirator and also by further suction through the action of a recirculated glycol liquid operating a liquid circulating vacuum pump in a final separation of non-condensable gases such as nitrogen from residual condensable vapors. The process is especially useful in preventing the discharge of the vaporous by-products into the surrounding environment during the production of the polyester product.

REFERENCES:
patent: 3468849 (1969-09-01), Rothert

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