液体石蜡萃取法回收废水中的乙酸丁酯

doi:10.16085/j.issn.1000-6613.2015.06.048

化工进展 ›› 2015, Vol. 34 ›› Issue (06): 1804-1808.DOI: 10.16085/j.issn.1000-6613.2015.06.048

• 资源与环境化工 • 上一篇

液体石蜡萃取法回收废水中的乙酸丁酯

徐迪^1,2, 唐英^1,2, 谭世语³

1 环境材料与修复技术重庆市重点实验室, 重庆 402168;
2 重庆文理学院材料与化工学院, 重庆 402168;
3 重庆大学化学化工学院, 重庆 400044

收稿日期:2014-11-13 修回日期:2014-12-29 出版日期:2015-06-05 发布日期:2015-06-05
通讯作者: 谭世语,教授,研究方向为化工过程开发、化工节能减排技术。E-mail:20091802117@cqu.edu.cn。
作者简介:徐迪(1986—),男,助教,研究方向为均相传质分离技术。E-mail:xdcq86@163.com。
基金资助:
重庆文理学院科研项目(Y2014CH22)。

Recovery of butyl acetate from wastewater by liquid paraffin extraction

XU Di^1,2, TANG Ying^1,2, TAN Shiyu³

1 Chongqing Key Laboratory of Environmental Materials and Remediation Technologies, Chongqing 402168, China;
2 College of Materials and Chemistry Engineering, Chongqing University of Arts and Sciences, Chongqing 402168, China;
3 College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

Received:2014-11-13 Revised:2014-12-29 Online:2015-06-05 Published:2015-06-05

摘要/Abstract

摘要： 为实现制药工业低浓度含乙酸丁酯废水的资源化利用, 通过考察生物质及乙酸丁酯的初始浓度、萃取温度、萃取时间、相比(萃取剂与含酯废水的体积比)等因素对萃取率的影响, 建立了以液体石蜡为萃取剂的对含酯模拟废水的萃取回收体系。结果表明:生物质浓度对萃取效果影响不大, 当相比为1:1、时间15min、温度25℃时, 对含酯0.7g/100mL的模拟废水, 液体石蜡的萃取率可达98%。利用多级萃取, 将已负载乙酸丁酯的萃取剂液体石蜡继续处理新鲜废水, 验证了萃取剂对乙酸丁酯的富集能力强而稳定。通过选取适宜相比进行多级萃取, 可将乙酸丁酯富集于液体石蜡中, 从而明显降低后处理的能耗。对萃取相进行减压蒸馏, 可将乙酸丁酯从液体石蜡中分离出来。经检测, 蒸馏液为质量浓度约98%的乙酸丁酯, 且含水量低于0.1%, 可回用作药物提取剂;同时液体石蜡得以再生, 且萃取效果良好。

关键词: 乙酸丁酯, 液体石蜡, 废水, 萃取, 回收

Abstract: In order to realize the recycle of low-concentration butyl acetate(BA)-containing wastewater from pharmaceutical industry, experiments were carried out to find out the extracting effects of the system with different initial biomass concentration, initial BA concentration, equilibration time, temperature and solvent ratio(the volume of extractant to wastewater), and the extracting system using liquid paraffin(LP) as extractant was set up. The results showed that the effect of biomass concentration on BA extraction was not significant. The extraction efficiency of BA was up to 98% in 15min at 25℃ when the initial concentration of BA was 0.7g/100mL. The loading capability of LP was verified to be high and steady by multi-stage extraction, in which the extract phase(LP loaded with BA) was recycled and reused to extract the fresh wastewater. By utilizing multi-stage extraction with suitable solvent ratio, BA can be enriched in LP, significantly reducing the energy consumption of the after treatments. In the extract phase, BA can be effectively recovered from the loaded LP by using vacuum evaporation. After testing, the purity of BA in distillate was about 98%, and the water content was less than 0.1%. This concentrated BA can be reused in the process of extracting in pharmaceutical industry. The LP obtained from the vacuum evaporation was regenerated at the same time with very good reusability.

Key words: butyl acetate, liquid paraffin, wastewater, extraction, recovery

中图分类号:

X703.1

徐迪, 唐英, 谭世语. 液体石蜡萃取法回收废水中的乙酸丁酯[J]. 化工进展, 2015, 34(06): 1804-1808.

XU Di, TANG Ying, TAN Shiyu. Recovery of butyl acetate from wastewater by liquid paraffin extraction[J]. Chemical Industry and Engineering Progree, 2015, 34(06): 1804-1808.

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液体石蜡萃取法回收废水中的乙酸丁酯

Recovery of butyl acetate from wastewater by liquid paraffin extraction

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