Terephthalic acid produced by oxidizing {TAIL ~ paraxylene} can be obtained in the form of dried powder from the slurry containing terephthalic acid and {HEAD ~ acetic acid} and water by using combination of a tubular type heater having at least one heating tube and a separation chamber in which the heating tube open at one end thereof 
Terephthalic acid produced by oxidizing { TAIL ~ paraxylene } can be obtained in the form of dried powder from the slurry containing terephthalic acid and { HEAD ~ acetic acid } and water by using combination of a tubular type heater having at least one heating tube and a separation chamber in which the heating tube open at one end thereof
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