甲基叔丁基醚萃取蒸馏脱硫的研究.pdf

石油化
1326?
PETROCHEMICAL TECHNOLOGY
2014年第43卷第11期
甲基叔丁基醚萃取蒸馏脱硫的研究
唐晓东2,谯勤,程瑾,向明锋4
(1.西南石油大学油气藏地质及开发工程国家重点实验室,四川成都60500;
2.西南石油大学化学化工学院,四川成都6l0500;3.上海利策科技有限公司,上海20023
4.四川恒日天然气工程有限公司,四川成都6l0500)
[摘要]采用萃取蒸馏法将甲基叔丁基醚(MTBE)萃取到萃取剂中,蒸馏得到低硫MTBE产品,并对萃取剂及萃取蒸馏的操
作条件进行了优化。实验结果表明,在水中添加非质子极性助溶剂ZRD制得的TMS萃取剂的脱硫效果较好,MTBE在TMS萃
取剂中的渀解度为10.5。采用TMS萃取剂的最佳实验条件为:MTBE50mL、粆取温度15℃、TMS与MTBE的体积比30、萃
取时间15s、相分离时间7min、蒸馏温度75℃、蒸馏时间25min。在最佳实验条件下,MTBF的硫含量可从98,1g/g降至8.4
gg、脱硫率为91.44%、MTBE的质量收率为9969%;TMS循环使用5次均可保证MTBE的硫含量降至10gg以下。该方法避
免了因萃取剂硫含量富而无法获得低硫MTBE产品的弊端。
关键词]甲基叔丁基醚;萃取蒸馏;脱硫
「文章编号」1000-8144(2014)11-1326-05
[中图分类号]TQ028.3
文献标志码]A
Desulfurization of Methyl ter-butyl Ether by Extractive Distillation
Tang iaodong, Qie
Chengjin, Xiang Mingfeng
( 1. State Kcy Laboratory of Oil and Reservoir Geology and Exploitation, Southwest Petroleum University
Chengdu Sichuan 610500, China; 2. College of Chemistry and Chemical Engineering. Southwest Petroleum University
Chengdu Sichuan 610500, China; 3. Shanghai Richtech Engineering Co, Ltd, Shanghai 200233, China;
4. Sichuan Hengri Natural gas Eng
Co, Ltd, Chengdu Si
610500,Chiu
Abstract J The extractive distillation of methyl tert-butyl ether(MTBE)was investigated to obtain
low-sulfur product. Extractants and operation conditions of the extractive distillation were optimized
The results showed that, the solubility of MTBE in TMS(H O with cosolvent ZRD)was 10.5. Under
the optimized conditions of TMS as extractant, extraction temperature 15 C, volume ratio of TMS
to MTBE 3.0, extraction time 15 S, phase separation time 7 min, distillation temperature 75 C and
distillation time 5 min, the sulfur onent in MTBE could be reduced from 98.1 u/g to8.4/g, and the
desulfurization rate and MTBE yield were 91. 44% and 99. 69%, respectively. The sulfur content was still
reduced to less than 10 ug/g after TMS was reused 5 times. This method can avoid the enrichment of sulfur
in extractants, which leads to that it is difficult to obtain low sulfur MTBE product
L Keywords J methyl tert-butyl ether; extractive distillation; desulfurization
随着人们对环境的日益重视,清洁燃料成为往往造成汽油硫含量不合格。随着国V车用汽油标
发展趋势2。甲基叔丁基醚(MTBE)主要用于准实施的临近,对低硫MTBE生产技术的需求也越
裂解制取高纯度的异丁烯到、充当反应溶剂和试来越迫切。鉴于国内MTBE产品硫含量普遍偏高的
剂,特别是汽油添加剂?。MTBE作为高辛烷值现状,加快开发高效经济的脱硫方法具有十分重要
汽油调合组分,其需求量不断增长8)。目前,因
收稿日期]2014-~05-15;[修改稿日期]2014-08-09
内多数炼油厂的MTBE总硫含量为80~200ugg,
作者简介]唐晓东(1963-),男,四川省南充市人,硕士,
有的甚至高达2000pgg,当其用于调合汽油时,教授,电话151082538,电邮txd079016,om。