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Catalysts Used in DOTP Synthesis
DOTP esterification runs two to three times slower than DINP production under identical reactor conditions. The reason has nothing to do with catalyst quality or reactor design. Purified terephthalic acid (PTA) is insoluble in 2-ethylhexanol (2-EH), forcing the entire reaction to proceed at the solid-liquid boundary where PTA particles contact the alcohol phase. This heterogeneous…
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