石油学报(石油加工) ›› 2021, Vol. 37 ›› Issue (1): 190-200.doi: 10.3969/j.issn.1001-8719.2021.01.020

• 研究报道 • 上一篇    下一篇

水力空化场苯-甲醇低温烷基化制备二甲苯

陈吉超1,马凤云1,刘景梅1,钟梅1,李学宽2,魏贤勇3,殷双杰4   

  1. 1. 新疆大学 化学与化工学院,煤炭洁净转化与化工过程新疆维吾尔自治区重点实验室,新疆 乌鲁木齐 830046;
    2. 中国科学院 山西煤炭化学研究所,山西 太原 030001; 3. 中国矿业大学 煤炭加工与高效洁净利用教育部重点实验室,江苏 徐州 221116; 4. 新疆大化富山化工有限公司,新疆 石河子 831300 
  • 收稿日期:2019-12-30 修回日期:2020-06-14 出版日期:2021-01-25 发布日期:2021-01-12
  • 通讯作者: 马凤云,女,教授,硕士,从事煤炭清洁转化及其过程研究, E-mail: ma_fy@126.com E-mail:ma_fy@126.com
  • 作者简介:第一作者:陈吉超,男,硕士研究生,从事煤炭清洁转化及其过程研究,E-mail:13579949755@163.com
  • 基金资助:
    国家自然科学基金重点项目(U1503293), 新疆维吾尔自治区区域协同创新专项基金项目(上海合作组织 科技伙伴计划)(2018E01010)资助

Low Temperature Alkylation of Benzene and Methanol in Hydrocavitation Field

CHEN Jichao1, MA Fengyun1, LIU Jingmei1, ZHONG Mei1, LI Xuekuan2, WEI Xianyong3, YIN Shuangjie4   

  1. 1. Key Laboratory of Coal Clean Conversion & Chemical Engineering Processes (Xinjiang Uyghur Autonomous Region), College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China; 2. Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; 3. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China; 4. Xinjiang Dahua Fusha Chemical Co. Ltd., Sihezi 831300, China 
  • Received:2019-12-30 Revised:2020-06-14 Online:2021-01-25 Published:2021-01-12

摘要: 基于文丘里型空化管的水力空化场强化,苯与甲醇在低温下进行烷基化反应;采用气相色谱质谱联用分析反应产物,考察反应条件对反应效果的影响,并根据产物分布,推测并验证了反应历程。结果表明:在水力空化条件下,苯与甲醇在低温下发生了烷基化反应,其主要反应产物为甲苯、二甲苯和乙苯。最佳反应条件为:空化管入口压力0.4 MPa,反应终温40 ℃,苯摩尔分数20%,时间40 min。该反应历程为:在水力空化场强化下,苯与甲醇解离生成·C6H5、·H、·CH3和·OH,继而·C6H5与·CH3和·H发生自由基串联反应,依次生成烷基苯和烷基环烷烃,·OH与·C6H5或·H发生自由基反应,分别生成苯酚或水。

关键词: 水力空化, 文丘里管, 苯烷基化反应, 甲醇, 二甲苯

Abstract: The alkylation of benzene and methanol was strengthened in the field of hydrodynamic cavitation based on a Venturi tube at low temperature. Reaction products were analyzed by gas chromatography-mass spectrometry, and the influence of reaction conditions on the reaction was investigated. Subsequently, the reaction process was proposed according to the products distribution. Results show that the main products of alkylation reaction between benzene and methanol are toluene, xylene and ethylbenzene. The optimum reaction conditions are Venturi tube inlet pressure of 0.4 MPa, final temperature of 40 ℃, benzene molar fraction of 20%, and time of 40 min. With the enhancement of hydrodynamic cavitation field, benzene and methanol are dissociated to generate ·C6H5, ·H, ·CH3 and ·OH, respectively. Afterwards, ·C6H5 and ·CH3 form alkyl benzene, alkyl benzene and ·H generate alkyl cycloalkane, whereas ·OH reacts with ·C6H5 or ·H to form phenol or water.

Key words: hydrodynamic cavitation, Venturi tube, alkylation reaction of benzene, methanol, xylene

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