性能特性 本品在常温下是白色晶体或粉末，低毒，易燃。若与空气混合，在一定的限度内遇火即燃烧甚至发生爆炸。它的自燃点680℃，燃点384~421℃，升华热98.4kJ/mol，燃烧热3225.9kJ/mol，密度1.55g/cm3。溶于碱溶液，微溶于热乙醇，不溶于水、乙醚、冰醋酸及氯仿。注意：避免与皮肤和眼睛接触。
精对苯二甲酸是聚酯工业的主要原料，目前主要采用对二甲苯空气氧化法生产。
Purified terephthalic acid, one of the main raw materials of polyester, is produced by p-xylene liquid phase oxidation.
该方法快速简便，具有良好的精密度和准确度，适用于进出口精对苯二甲酸的日常检验。
The method was simple and rapid with satisfactory precision and was suitable for daily inspection of imported and exported PTA.
通过对PTA(精对苯二甲酸)装置影响醋酸消耗的分析，认为反应温度对酸耗影响最大。
Reaction temperature as major factor on consumption of acetic acid was found by analysis of operation of PTA unit.
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