通過這一段時間的了解，相信大家對精對苯二甲酸已經(jīng)是不陌生了，但對于想進(jìn)一步了解本產(chǎn)品的相關(guān)知識的客戶來說這些內(nèi)容還是不夠的。今天小編就將關(guān)于精對苯二甲酸方面的知識與大家分享一下，希望引起大家的重視，讓大家對精對苯二甲酸有一個深層次的了解。
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.
這樣大家在購買使用精對苯二甲酸時也能做到心中有數(shù)，不慌不忙，希望對大家有所啟發(fā)與幫助。以對二甲苯為原料，液相氧化生成粗對苯二甲酸，再經(jīng)加氫精制，結(jié)晶，分離，干燥，得到精對苯二甲酸。精對苯二甲酸為石油的下端產(chǎn)品。石油經(jīng)過一定的工藝過程經(jīng)營出石腦油(別名輕汽油)，從石腦油中提煉出MX(混二甲苯)，再提煉出PX(對二甲苯)。
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.
精對苯二甲酸以PX(配方占65%－67%)為原料，以醋酸為溶劑，在催化劑的作用下經(jīng)空氣氧化(氧氣占35%－33%)，生成粗對苯二甲酸。然后對粗對苯二甲酸進(jìn)行加氫精制，去除雜質(zhì)，再經(jīng)結(jié)晶、分離、干燥、制得精對苯二酸產(chǎn)品，即精對苯二甲酸成品。
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.
