Apparatus for the preparation of polyester resin
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United States of America Patent
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Feb 3, 1998
Grant Date -
N/A
app pub date -
Aug 8, 1996
filing date -
Aug 9, 1995
priority date (Note) -
Expired
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Abstract
Apparatus for preparing a polyester resin by polymerizing a monomer produced by transesterifying a dicarboxylic acid component with a diol component while removing the vapor containing diols and other low molecular weight compound released during the polymerization, which comprises: a polymerization reactor; a condenser having an inlet, a heat exchanger and an outlet, the inlet being located below the heat exchanger and connected to the polymerization reactor while the outlet being positioned above the heat exchanger; a baffle installed between the inlet and the heat exchanger of the condenser such that the flow of the vapor is directed toward the bottom of the condenser; a trap located below the condenser to collect the condensate of the vapor; and a vacuum pump connected to the outlet of the condenser.
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