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2. Basic process principles
2.1 Process chemistry
PET can be prepared by reacting 1,2-ethanediol or monoethylene glycol (MEG) :
either directly with terephthalic acid, the so-called direct esterification route;
or with dimethyl ester or dimethyl terephthalate (DMT); this is the so-called ester interchange route.
These pathways are described in the following reaction schemes (with Ar = C 6 H 4 ).
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Interéchange-Voie ex-DMT
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Unit operations. Chemical reaction engineering
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Basic process principles
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