从甲醇合成油中提取高附加值重芳烃的工艺.pdf

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CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年第31卷第4期
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研究开发
从甲醇合成油中提取高附加值重芳烃的工艺
石荣方',张敏革2,许长春23,丛山23,隋红23,李洪213,王磊,李鑫钢2
('云南先锋化工有限公司,云南昆明。6504:2天津大学化工学院,精馏技术国家工程研究中心,
天津30002:3北洋国家精馏技术工程发展有限公司,天津30002
摘要:针对褐煤气化、合成等工序得到的甲醇合成油芳烃含量高的特殊情况,提出采用分馏-脱轻-脱重工艺路
线来富集高浓度均四甲苯的分离方策。通过流程模拟计算发现,分馏塔在常压条件下,当塔预温度为129.7℃
塔底温度为21.5℃时,分馏得到的均四甲苯富集液质量分数为71.72%6;在真空操作下,通过脱轻塔和脱重塔脱
除轻组分和重组分后,可得到质量分数高达91.3%的均四甲苯溶液。精馏实验证明,上述工艺路线是可行的。
关键词:甲醇合成油;均四甲苯;流程模拟;分馏
中图分类号:TQ53
文献标志码
文章编号:1000-6613(2012)04-0768-05
Experimental study and technology research on the extraction of heav
aromatics from methanol synthetic oil
SHI Rongfang, ZHANG Minge, XU Changchun, CONG Shan, 3, SUT Hong 3
LI Hong", WANG Lei"3, LI Xingang? s
('yunnan Xianfeng Chemical Group Co Ltd, kunming 655204, Yunnan, China
State Engineering Research Centre for Distillation Technology, Tianjin University, Tianjin 300072, China
National Distillation Technology Company Limited, Tianjin 300072, China
Abstract: As the methanol synthetic oil, produced from lignite gasification and other synthetic
processes, has high content of aromatic, a method of the extraction of high concentration durene from
methanol synthetic oil by fractionation as well as the removal of light component and heavy component
has been proposed. The simulation results showed that, at atmospheric conditions, durene concentration
reached 71.72% when top temperature was 129.7 C and bottom temperature was 211.5 C in
fractionator, then under vacuum condition durene solution could be concentrated up to 91.3% by
removing light fraction and removing low boiling and high boiling fractions in two rectifying columns
The feasibility of the process route was verified in a distillation column with the diameter of 30 mm
Key words: methanol synthetic oil; durene; simulation; fractionator
褐煤是一种高水分、高灰分、低热值、煤化程准芳烃含量高,过高的重芳烃含量虽然能够増加
度最低的劣质煤,直接燃烧会严重污染环境,发电油品的辛烷值和热值,但是在燃烧后会产生致癌
效率也不高叫。由褐煤制甲醇再制汽油技术(MTG物苯,増大二氧化碳排放量,直接影响人类健康,
技术)是祸煤高效、洁净利用的主要途径之一
并且重芳烃容易结晶堵塞油路。因此,如何脱除
步法MTG甲醇合成油技术在国内实现了工业化重芳烃、提高甲醇合成油品利用价值是亟待解决
应用,由该装置生产出的MTG合成油油品成分比的问题。
较特殊,既存在较多的C~C。的轻组分,同时所
含的C10重芳烃中均四甲苯含量又较高,达8%左
收稿日期:201109-14;修改稿日期:2012-01-13。
第一作者:石荣方(1975-),男,工程师。联系人:李鑫钢,教授。
右,并且这种合成油产品相比于国家车用汽油标E-mailIxq(@tju.edu.cn