Through this period of understanding, I believe you are no stranger to purified terephthalic acid, but these contents are not enough for customers who want to further understand the relevant knowledge of this product. Today, I will share my knowledge about PTA with you, hoping to attract your attention and let you have a deep understanding of PTA.

这样大家在购买使用精对苯二甲酸时也能做到心中有数，不慌不忙，希望对大家有所启发与帮助。以对二甲苯为原料，液相氧化生成粗对苯二甲酸，再经加氢精制，结晶，分离，干燥，得到精对苯二甲酸。精对苯二甲酸为石油的下端产品。石油经过一定的工艺过程经营出石脑油(别名轻汽油)，从石脑油中提炼出MX(混二甲苯)，再提炼出PX(对二甲苯)。

In this way, we can know what to do when purchasing and using purified terephthalic acid. We hope to inspire and help you. Using p-xylene as raw material, crude terephthalic acid is produced by liquid-phase oxidation, and then refined terephthalic acid is obtained by hydrofining, crystallization, separation and drying. Purified terephthalic acid is the end product of petroleum. Naphtha (also known as light gasoline) is produced from petroleum through a certain process. MX (mixed xylene) is extracted from naphtha, and then PX (p-xylene) is extracted.

精对苯二甲酸以PX(配方占65%－67%)为原料，以醋酸为溶剂，在催化剂的作用下经空气氧化(氧气占35%－33%)，生成粗对苯二甲酸。然后对粗对苯二甲酸进行加氢精制，去除杂质，再经结晶、分离、干燥、制得精对苯二酸产品，即精对苯二甲酸成品。

Pure terephthalic acid takes PX (formula accounts for 65% - 67%) as raw material and acetic acid as solvent. Under the action of catalyst, it is oxidized by air (oxygen accounts for 35% - 33%) to produce crude terephthalic acid. Then, the crude terephthalic acid is hydrotreated to remove impurities, and then refined terephthalic acid product, i.e. refined terephthalic acid product, is prepared by crystallization, separation and drying.