{HEAD ~ 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 {TAIL ~ a tubular type heater} having at least one heating tube and a separation chamber in which the heating tube open at one end thereof 
{ HEAD ~ 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 { TAIL ~ 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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