purified terephthalic acid, one of the main raw materials of polyester, is produced by p-xylene liquid phase oxidation.
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。
polymer grade p-phthalic acid can be synthesized by p-xylene directly oxidation in gas-liquid-solid reaction system with stirred tank reactor.
氧化工艺采用气液固系搅拌式氧化反应器,可由对二甲苯氧化直接制备聚合级对苯二甲酸;
through transforming the furnace fuel supply system and introducing fcc recycle oil as part of the fuel, the operation of the p-xylene unit was stable and the environment pollution was alleviated.
通过改造炉用燃料供给系统,引催化裂化回炼油作部分炉用燃料,使该装置操作平稳并减少了环境污染;
n-ethylpiperazine and monoethanolamine were separated by the heterogenous azeotropic batch distillation with p-xylene and cyclohexane as the entrainers, respectively.
本文采用以对二甲苯和环己烷为共沸剂的非均相间歇共沸精馏方法分离n-乙基哌嗪-乙醇胺的共沸混合物。
results showed clearly that p-xylene had good biocompatibility as organic solvent in the two-phase system, its relative amount was 15%.
研究表明,二甲苯作为两相中的有机溶剂具有较好的生物相容性,加入量在总体积分数的15%;
more p-xylene may be obtained by disproportionation and isomerization of alkylbenzenes.