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Development in Decreasing Ash Content of Terephthalic Acid

Du Jianghua,Lü Zihong(Chemical College of East China University of Science and Technology,Shanghai 200237)  
Ingredients of ash during the production of terephthalic acid are introduced,possible ash-forming mechanism is analyzed,affecting factors on ash-forming is reviewed,various measures for ash removal are commented.It is necessary to further study the mechanism for ash-forming so as to remove the ash effectively and improve the color and quality of terephthalic acid product.
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