化工学报 ›› 2019, Vol. 70 ›› Issue (S1): 235-241.doi: 10.11949/j.issn.0438-1157.20190174

• 材料化学工程与纳米技术 • 上一篇    下一篇

煤制烯烃基长链烷基二甲苯合成研究

闫磊1,2(),陈思宇1,2,肖美良子1,2,丁伟1,2()   

  1. 1. 东北石油大学化学化工学院,黑龙江 大庆 163318
    2. 石油与天然气省化工重点实验室,黑龙江 大庆 163318
  • 收稿日期:2019-03-03 修回日期:2018-03-11 出版日期:2019-03-31 发布日期:2019-04-26
  • 通讯作者: 丁伟 E-mail:dqpiyl@126.com;dingwei40@126.com
  • 作者简介:<named-content content-type="corresp-name">闫磊</named-content>(1984—),男,博士研究生,讲师, <email>dqpiyl@126.com</email>|丁伟(1964—),男,教授,<email>dingwei40@126.com</email>

Synthesis of long chain alkyl xylene from coal to olefin

Lei YAN1,2(),Siyu CHEN1,2,Meiliangzi XIAO1,2,Wei DING1,2()   

  1. 1. College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
    2. Provincial Key Laboratory of Chemical Industry of Petroleum and Natural Gas, Daqing 163318, Heilongjiang, China
  • Received:2019-03-03 Revised:2018-03-11 Online:2019-03-31 Published:2019-04-26
  • Contact: Wei DING E-mail:dqpiyl@126.com;dingwei40@126.com

摘要:

采用无水三氯化铝与多卤代烷组成的络合物催化体系,研究了以煤制烯烃某一馏分段和混合二甲苯为原料合成煤制烯烃基长链烷基二甲苯。采用条件实验法得出的较佳工艺参数是:起始反应温度为室温,混合二甲苯/煤制烯烃的质量比为2∶3,相当于物质的量之比2.2~2.5∶1,催化剂用量为反应液总量的1/110(质量分数),反应时间为60 min,得到的长链烷基二甲苯的含量在80%以上;计算得到其平均分子量约为302.5,相当于十四烷基二甲苯的平均分子量,具有一定的分子量分布,是更好的生产烷基芳基磺酸盐的原料,并在30 L反应器中进行了放大实验。

关键词: 烷基化, 长链烷基二甲苯, 煤制烯烃, 无水三氯化铝络合物, 界面张力, 放大

Abstract:

The synthesis of long chain alkylated xylene from coal to olefin was studied by using a fraction of coal to olefin and mixed xylene as raw materials. Condition experiment method used to get the better process parameters are the initial reaction temperature of room temperature, the quality of the mixed xylene/coal to olefin ratio of 2∶3(equal to the amount of substance ratio of 2.2—2.5∶1), the catalyst for 1/110 of the total reaction liquid (mass fraction), the reaction time for 60 min, the long chain alkyl dimethyl benzene content in more than 80%. The average molecular weight was calculated to be about 302.5, equivalent to the average molecular weight of tetraalkylxylene, with a certain molecular weight distribution, which was a better raw material for the production of alkyl aryl sulfonate, and the amplification experiment was carried out in a 30 L reactor.

Key words: alkylation, long chain alkyl xylene, coal to olefin, anhydrous aluminum trichloride complex, interfacial tension, scale-up

中图分类号: 

  • TE 39

表1

煤制烯烃组成"

C数烯烃含量/%烷烃含量/%
110.510.46
1210.395.30
1312.696.29
1411.175.59
159.134.75
166.584.33
174.443.56
182.622.87
191.492.06
200.841.41
210.390.92
220.210.59
230.110.38
240.050.25
250.020.17
26~3200.43
总计60.6439.36

图1

烷基二甲苯磺酸盐和烷基苯磺酸盐在油水界面上的吸附"

图2

起始反应温度的影响"

图3

二甲苯与煤制烯烃的质量比的影响"

图4

催化剂用量的影响"

图5

反应时间的影响"

图6

组成分析"

图7

煤制烯烃烷基化反应馏出物的组成"

表2

煤制烯烃基长链烷基二甲苯的30 L放大实验"

实验次数收率/%平均分子量
181.96302.80
282.41302.30
383.05302.90
平均值82.47302.67
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