辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2006, Vol. 26 ›› Issue (1): 1-4.

• 石油化工 •    下一篇

Fe -MCM -41 分子筛的合成及应用———催化氧化环己烷制环己酮

肖　兵, 张　毅, 任　涛, 连丕勇＊   

  1. 辽宁石油化工大学石油化工学院, 辽宁抚顺113001
  • 收稿日期:2005-10-24 出版日期:2006-01-25 发布日期:2006-01-25
  • 作者简介:肖兵(1981 -), 女, 辽宁沈阳市, 在读硕士。
  • 基金资助:
    基金项目:国家自然科学基金(29792070)。

Synthesis and Application of Fe -MCM -41 Molecular Sieves : Cyclohexane Catalysis Oxidation Into Cyclohexanone

  1. School of Petrochemical Technology , Liaoning University of Petroleum & Chemical Technology ,
    Fushun Liaoning 113001, P .R .China
  • Received:2005-10-24 Published:2006-01-25 Online:2006-01-25

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摘要：         用十六烷基三甲基溴化铵为模板剂, 水玻璃为硅源, 在55 ℃水热合成过程中加入硝酸铁溶液, 在160℃晶化48 h, 合成出Fe -MCM -41 分子筛。并用粉末X -射线衍射、N2 吸附-脱附、红外光谱及差热-热重分析等手段进行了表征。结果表明, 合成的分子筛具有良好的晶体结构, 铁已经进入分子筛骨架。利用Fe -MCM -41分子筛作为催化剂, 以氧气为氧源, 考察了温度、时间、压力等因素对环己烷选择性氧化反应的影响。环己烷的转化率随着时间和温度的增加而增加, 但压力的增加对其影响不大。在反应6 h , 温度为180 ℃, 反应压力为2 .5 MPa 的条件下, 环己烷的转化率为14 .0%, 环己酮的选择性为9 .5 %, 环己醇的选择性为90 .5 %。

关键词: Fe -MCM -41 分子筛,  , 　水热合成, 　选择性氧化, 　环己烷

Abstract:

        Hexadecyl trimethyl ammonium bromide was employed as template agent , sodium silicate as the silica source and the solution of iron nitrate were added in the synthesis process under 55 ℃, the mesoporous molecular sieve Fe -MCM -41 was synthesized using the hydrothermal method, which was crystallized for 48 hours under 160 ℃.The products were characterized by XRD, nitrogen adsorption and desorption , IR and TG -DTA .The results show that the molecular sieve has the favourable crystal structure and the iron has been located in framework of the molecular sieve .Fe -MCM -41 molecular sieve was used as catalyst and oxygen gas as oxidant for the selective oxidation of cyclohexane .The effects of temperature , time and pressure on cyclohexane selective oxidation reaction were investigated .The conversion of cyclohexane is increased as the increasing of time and temperature , but the pressure has little effect on it .Under the conditions of reaction time being 6 hours, temperature being 180 ℃, and pressure being 2 .5MPa , the conversion of cyclohexane is 14 .0 %, the selectivity of cyclohexanone is 9 .5 %, and the selectivity of cyclohexanol is 90.5 %.

Key words: 　Fe -MCM -41 molecular sieves, 　Hydrothermal synthesis , 　Selective oxidation, 　Cyclohexane

引用本文

肖　兵, 张　毅, 任　涛, 连丕勇. Fe -MCM -41 分子筛的合成及应用———催化氧化环己烷制环己酮[J]. 辽宁石油化工大学学报, 2006, 26(1): 1-4.

XIAO Bing,ZHANG yi. Synthesis and Application of Fe -MCM -41 Molecular Sieves : Cyclohexane Catalysis Oxidation Into Cyclohexanone[J]. Journal of Liaoning Petrochemical University, 2006, 26(1): 1-4.

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