Process for producing terephthalic acid
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United States of America Patent
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Issued Date -
Jan 19, 2006
app pub date -
Nov 14, 2003
filing date -
Nov 14, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
In order to provide a method for producing a high-purity aromatic dicarboxylic acid such as terephthalic acid with high energy efficiency using a simplified process, in the method for producing terephthalic acid according to the present invention, solid-liquid separation and cleaning steps are carried out using a single device, and in a step for removing any liquid adhered to terephthalic cakes by evaporation, internal energy stored in the terephthalic acid cakes and/or the liquid adhered thereto is used at least part of the energy for evaporating the liquid adhered to the cakes.
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