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›› 2014, Vol. 14 ›› Issue (6): 967-972.

• 过程与工艺 • 上一篇    下一篇

气相缩合法合成甲基苯基二氯硅烷过程的积炭特性

刘彤 汪超 王铁峰 王金福   

  1. 清华大学化学工程系绿色反应工程与工艺北京市重点实验室 清华大学化学工程系 清华大学化工系 清华大学化工系
  • 收稿日期:2014-09-17 修回日期:2014-10-22 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: 王铁峰

Coke Deposition Features in Methylphenyldichlorosilane Synthesis by Gas Phase Condensation

LIU Tong WANG Chao WANG Tie-feng WANG Jin-fu   

  1. Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University Department of Chemical Engineering, Tsinghua University
  • Received:2014-09-17 Revised:2014-10-22 Online:2014-12-20 Published:2014-12-20
  • Contact: WANG Tie-feng

摘要: 利用形貌表征、元素组成分析、热重分析、拉曼光谱表征等方法,对氯苯和甲基二氯硅烷气相缩合法合成甲基苯基二氯硅烷(MPDS)过程的积炭特性进行了研究. 结果表明,MPDS合成过程中的积炭石墨化程度高,且均为不可溶解炭. 氢/碳摩尔比为0.35~1.74;在氧气气氛中积炭主要的失重温度区间为650~1100 K,烧炭过程为一级反应,表观活化能为117 kJ/mol;氯苯对积炭的贡献大于甲基二氯硅烷,相同条件下氯苯的积炭量是甲基二氯硅烷的3倍. 可适当降低氯苯预热温度以减少积炭.

关键词: 甲基苯基二氯硅烷, 积炭, 气相缩合

Abstract: Coke deposition features in methylphenyldichlorosilane (MPDS) synthesis by gas phase condensation from chlorobenzene (PhCl) and methyldichlorosilane (MH) were studied with morphology characterization, element analysis, thermogravimetry and Raman spectroscopy. The deposited coke formed in MPDS synthesis had high graphitization degree, and was insoluble coke. The molar ratio of hydrogen to carbon was 0.35~1.74. Thermogravimetric analysis was carried out in the oxygen atmosphere, the main weight loss temperature range was 650~1100 K. The coke burning process was first order reaction with the apparent activation energy of 117 kJ/mol. The contribution of PhCl to the deposited coke was more significant than that of MH, and the amount of deposited coke formed from PhCl was 3 times as much as that formed from MH. Therefore the preheating temperature of chlorobenzene should be decreased to reduce the deposited coke.

Key words: methylphenyldichlorosilane, deposited coke, gas phase condensation

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