对二甲苯富氧氧化的研究及工业化试验  

Oxidation of p-xylene with oxygen-riched air and its industrial test

作　　者：邢建良[1] 曾崇余[2] 任晓乾[2] 

机构地区：[1]扬子石油化工股份有限公司化工厂,江苏南京210048 [2]南京工业大学化学化工学院,江苏南京210009

出　　处：《合成纤维工业》2004年第3期28-30,共3页China Synthetic Fiber Industry

摘　　要：研究了以Co-Mn-Br为催化剂,对二甲苯(PX)液相氧化下不同氧浓度(质量分数21%～31%)和不同空速对对苯二甲酸(TA)产率、中间产物含量、PX消耗速率和尾气中二氧化碳含量等的影响.结果表明:提高进气中氧浓度,尾气中氧浓度相应提高,有利于加快PX的氧化和TA的生成速率,且未加剧醋酸深度氧化生成二氧化碳.在PX处理量一定时,提高进气氧浓度可大大降低气体空速.工业化富氧(氧气质量分数23%)条件下的氧化反应安全可行,不影响产品质量.The liquid phase oxidation of p-xylene (PX) in the presence of Co-Mn-Br catalyst was carried out with oxygen-riched gas. The effects of oxygen content from 21% to 31% and space velocity on terephthalic acid (TA) yield, intermediates content, consumption rate of PX and carbon dioxide content in vent gas were studied. The results showed that the oxidation rate of PX and the formation rate of TA can be accelerated with increasing the oxygen content in feed gas while the overoxidation of acetate acid was not aggravated. The space velocity can be decreased greatly at a fixed PX load while oxygen content increasing. The industrial test results revealed that oxygen-riched oxidation at oxygen content 23% is safe and feasible, without losing the product quality.

关 键 词：对二甲苯 富氧氧化技术 Co-Mn-Br 催化剂 PX 聚酯 原料 溶剂 

分 类 号：TQ245.122[化学工程—有机化工]