废溶剂油分离研究.pdf

第40卷第11期
应用化工
Vol40 No 11
2011年11月
Applied Chemical Industry
Noy,2011
废溶剂油分离硏究
李跃金2,李营3,李长海
(1.滨州学院化学与化工系,山东滨州256603;2.滨州学院化工技术研究中心,
山东滨州256603;3.辽宁石油化工大学化学与材料学院,辽宁抚顺11330
摘要:研究以间歌精馏从工业废溶剂油中分离二甲苯和醋酸丁酯。一是对预处理后的原料直接进行了间歇精馏
工艺实验研究;二是将废溶剂油中的轻组分和重组分去掉后再分离二甲苯和醋酸丁酯;三是将原料按照不同的温
度范圃进行切取,将切取后得到的物质再进行分离。结果表明,在回流比R=4时,采用エ艺ー、二和三得到的二甲
苯纯度≥95%,收率分别为67%,75%和74.2%。采用工艺ー、二得到的醋酸丁酯纯度<95%,工艺三得到的醋酸
丁酯纯度≥95%,收率为85%
关键词:间歇精馏;回收;二甲苯;醋酸丁酯
中图分类号:TQ028.3文献标识码:A文章编号:1671-3206(2011-1925-04
Study on separation of spent oil
LI Yue-jin 2, LI Ying, L/ Chang
(1. Department of Chemistry and Chemical Engineering, Binzhou University, Binzhou 256603, China
2. Chemical Technology Research Center, Binzhou University, Binzhou 256603, China;
3. School of Chemistry and Materials Science, Liaoning Sh hua University, Fushun 113300, China)
Abstract: The recovery of dimethylbenzene and butylacetate from industrial spent solvent oil by batch di-
tilation was studied. Firstly, the batch distillation experiment was performed with pretreated material sec
ondly, the experiment was performed with the oil which was seperated the light and heavy part; lastly, the
experiment was performed with the oil which was in the range of different temperatures. The experimental
results showed that under the reflux ratio R=4, the concentration of dime benzene was over 95%
which was separately used the technology one, two and three, and the yield of dimethylbenzene was 67%
75%o and 74.2%, respectively. The concentration of butylacetate was blow 95%, which was separatly
used the technology one and two, The concentration of butylacetate was over 95% which was used the
technology three, and the yield of butylacetate was 85%
Key words: bathdistillation recovery; dimethylbenzene; butylacetate
有机溶剂在我国的各个行业中大量使用,仅青岛又会引发新的水体污染,且污染后的水源可再生性
市每年产生的可回收废有机溶剂在6500~8000t,极差,因此,此法不可取。焚烧法是直接将废溶剂油
集中在电子电器、石油化学、制药生物、交通运输设备直接燃烧,虽然能够比较完全地处理液体废弃物,但
制造、科研实验与汽车消费等行业,其中苯系物是是焚烧方法要达到标准,其工艺要求非常严格,焚烧
比较多的一类?。大量富含苯系物和醋酸丁酯的工工艺不达标,将产生更为严重的二嗯英污染以及烟
业废溶剂油含有多种有机杂质,成分复杂,黏度较大,尘、粉尘污染。从目前国内技术以及经济条件来看
有刺激性气味,对人体神经系统和生态环境危害巨大部分焚烧设备都不达标,这样会造成二次污染,因
大
此该方法不可取。减压蒸馏法采取减压蒸馏塔来回
目前,废有机溶剂一般是采用稀释法、焚烧法、收废溶剂油中的主要成分,通过降低塔金内压强来
蒸馏法和减压蒸馏法等进行处理∽。稀释法采用降低溶剂挥发温度,回收效果较好,但是减压蒸馏设
大量的水对废溶剂进行稀释,既造成水资源的浪费,
备要求气密性高,生产时能耗大,投人较大,缺点较
收稿日期:2011-08-20修改稿日期:201109-2
基金项目:山东省自然科学基金项目(Z2009BL001);滨州市科技发展计划项目(滨科计[2010]25号);滨州学院科研基
金( BZXYG1115
作者简介:李跃金(1983-),男(满族),辽宁抚顺人,滨州学院助教,主要从事工业污染物的资源化技术研究。电话:
15169901619,E-mail:liyuejin83@163.com