摘要
CO_(2)酸化工艺是酚钠酸化的主流工艺,通过在小型酚钠酸化塔中模拟实际工业生产过程,重点考察反应温度、通气量对酸化过程的影响,研究反应终点的判断依据以及生产过程中可能出现的堵塞问题和应对方法。实验表明,温度变化与酸化反应速率成正比,90℃时能更快达到反应终点;在CO_(2)通气量为理论值150%时基本上能达到较好的反应效果,过量的CO_(2)并不能明显提高反应效率;酚钠酸化过程伴随着pH值的下降,当pH接近9.5时即可作为反应终点,pH低于9.3开始出现结晶堵塔现象,不利于塔器正常运行。控制反应的pH值和提高CO_(2)进气口温度有利于降低塔体的堵塞。
CO_(2)acidification process represents the mainstream process for sodium phenol acidification.Through simulating the actual industrial production process in a small sodium phenol acidification tower,the influences of reaction temperature and ventilation on the acidification process is investigated.The judgment basis of the reaction endpoint,and the possible blockage problems in the production process and the countermeasures are studied.Experiment shows that the temperature change is proportional to the speed of acidification reaction,and the reaction end point can be reached faster at 90℃.When the CO_(2)ventilation is 150%of the theoretical one,the reaction can achieve high efficiency,but excess CO_(2)cannot improve the reaction efficiency significantly.Sodium phenol acidification process is accompanied by a decrease in pH value.The reaction endpoint can be determined when the pH is close to 9.5.When the pH is lower than 9.3,the phenomenon of crystallization tower plugging appears,which is not conducive to the normal operation of the tower.
作者
熊耀
徐娟娟
许高洁
韦凤密
徐峰
XIONG Yao;XU Juan-juan;XU Gao-jie;WEI Feng-mi;XU Feng(Beijing Zhongke Kanglun Energy Technology Co.,Ltd.,Beijing 102627,China;Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100089,China;Beijing Cycle Columbus Environmental Science and Technology Co.,Ltd.,Beijing 100088,China)
出处
《现代化工》
CAS
CSCD
北大核心
2024年第S01期253-256,共4页
Modern Chemical Industry
关键词
酚钠
CO_(2)
酸化
粗酚
过程控制
sodium phenol
carbon dioxide
acidification
crude phenol
process control
