[1]殷孝谦,何摇岳.多级萃取回收精对苯二甲酸精制废水中对甲基苯甲酸的模拟研究[J].南京师范大学学报(工程技术版),2021,21(03):056-61.[doi:10.3969/j.issn.1672-1292.2021.03.008]
　Yin Xiaoqian,He Yaoyue.Simulation of Multistage Extraction to Recover p-Toluic Acidfrom Pure Terephthalic Acid Refined Wastewater[J].Journal of Nanjing Normal University(Engineering and Technology),2021,21(03):056-61.[doi:10.3969/j.issn.1672-1292.2021.03.008]
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多级萃取回收精对苯二甲酸精制废水中对甲基苯甲酸的模拟研究
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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
21卷
期数:
2021年03期
页码:
056-61
栏目:
化学工程与技术
出版日期:
2021-09-30

文章信息/Info

Title:
Simulation of Multistage Extraction to Recover p-Toluic Acidfrom Pure Terephthalic Acid Refined Wastewater
文章编号:
1672-1292(2021)03-0056-06
作者:
殷孝谦1; 何摇岳2
(1.中国石化仪征化纤有限责任公司,江苏 仪征 211900)(2.澳门科技大学资讯科技学院,澳门 999078)
Author(s):
Yin Xiaoqian1; He Yaoyue2
(1.Sinopec Yizheng Chemical Fibre Co.,Ltd.,Yizheng 211900,China)(2.Faculty of Information Technology,Macau University of Science and Technology,Macau 999078,China)
关键词:
模拟; 建模; 精对苯二甲酸精制废水; 对甲基苯甲酸; 萃取
Keywords:
simulation; modeling; pure terephthalic acid refined wastewater; p-Toluic acid; extraction
分类号:
TQ028.4
DOI:
10.3969/j.issn.1672-1292.2021.03.008
文献标志码:
A
摘要:
对苯二甲酸精制过程中会产生大量的废水,该废水中含有一定量的对甲基苯甲酸、对苯二甲酸及苯甲酸等有机物. 针对主要成分对甲基苯甲酸,提出了多级连续逆流萃取回收工艺方案,应用Aspen Plus过程模拟软件对水-对甲基苯甲酸-对二甲苯体系进行二元交互参数回归,并对单级萃取进行模拟计算. 实验证明,模拟值与实验值吻合度较高,模型准确可靠. 应用灵敏度分析研究了萃取级数、萃取剂用量及温度等因素对多级连续逆流萃取工艺的影响,在常压、30 000 kg/h处理量、对甲基苯甲酸含量350 mg/kg的废水工况下,确定了较优的工艺条件:萃取级数为六级、萃取剂用量为4 500 kg/h、温度为常温,此时处理后废水中对甲基苯甲酸含量可降至 0.66 mg/kg,回收率接近100%,对二甲苯夹带量为9.4 mg/kg,同时处理后废水中对苯二甲酸及苯甲酸含量均有所降低.
Abstract:
A large amount of waste water is produced during the refining process of terephthalic acid,which contains a certain amount of organic matters,such as p-Toluic acid,terephthalic acid and benzoic acid. The process of multistage continuous countercurrent extraction to recover p-Toluic acid(main component)from pure terephthalic acid refined wastewater is proposed. Aspen Plus process simulation software is used to regress binary interaction parameters of the water-p-Toluic acid-p-xylene system. The influence of key factors,such as extraction stages,extractant dosage and temperature,on the multistage continuous countercurrent process are studied by using sensitivity analysis tools. The optimum process conditions are determined under the conditions of normal pressure,30 000 kg/h treatment amount,PT acid content 350 mg/kg. The optimum extraction stages:6,extractant dosage:4 500 kg/h,temperature:normal temperature,in which case,the PT acid content in the treated wastewater can be reduced from 350 mg/kg to 0.66 mg/kg,the recovery rate of PT acid is close to 100%,the entrainment quantity of PX is 9.4 mg/kg,and the terephthalic acid and benzoic acid content is also reduced.

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备注/Memo

备注/Memo:
收稿日期:2020-09-13.
通讯作者:殷孝谦,工程师,研究方向:聚合化工单体开发及化工技术研究. E-mail:yinxq.yzhx@sinopec.com
更新日期/Last Update: 2021-09-30