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