Cu-Cr2O3催化剂上二氟乙酸甲酯催化加氢合成二氟乙醇

doi:10.3969/j.issn.0438-1157.2013.06.028

化工学报 ›› 2013, Vol. 64 ›› Issue (6): 2103-2108.DOI: 10.3969/j.issn.0438-1157.2013.06.028

• 催化、动力学与反应器 • 上一篇下一篇

Cu-Cr₂O₃催化剂上二氟乙酸甲酯催化加氢合成二氟乙醇

曹晓雁¹, 郑素贞¹, 吴周安², 王树华², 周强², 鲁继青¹, 罗孟飞¹

1. 浙江师范大学物理化学研究所,先进催化材料教育部重点实验室,浙江金华 321004;
2. 浙江巨化集团技术中心, 浙江衢州 324004

收稿日期:2012-09-27 修回日期:2012-12-14 出版日期:2013-06-05 发布日期:2013-06-05
通讯作者: 罗孟飞
作者简介:曹晓雁(1985—),女,硕士研究生。
基金资助:
教育部"长江学者和创新团队发展计划"创新团队(IRT0980)。

Cu-Cr₂O₃ catalysts for hydrogenation of methyl difluoroacetate to 2,2-difluoroethanol

CAO Xiaoyan¹, ZHENG Suzhen¹, WU Zhouan², WANG Shuhua², ZHOU Qiang², LU Jiqing¹, LUO Mengfei¹

1. Key Laboratory of Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China;
2. Juhua Group Engineering Technology Research Center of National Fluoride Materials, Quzhou 324004, Zhejiang, China

Received:2012-09-27 Revised:2012-12-14 Online:2013-06-05 Published:2013-06-05

摘要/Abstract

摘要： 采用共沉淀法制备了Cu-Cr₂O₃催化剂,考察了铜含量对Cu-Cr₂O₃催化剂的二氟乙酸甲酯加氢合成二氟乙醇性能的影响。运用X射线衍射(XRD)、程序升温还原(TPR)、BET和Raman光谱技术对该催化剂进行了表征。结果表明,还原态Cu-Cr₂O₃催化剂物相主要由Cu和Cr₂O₃组成,然而30Cu-Cr₂O₃和50Cu-Cr₂O₃催化剂存在少量CuCr₂O₄和CuCrO₂复合氧化物。随着铜含量的增加,Cu-Cr₂O₃催化剂的二氟乙酸甲酯单程转化率呈现先上升后下降的趋势,而二氟乙醇选择性保持在70%左右; 30Cu-Cr₂O₃催化剂的二氟乙酸甲酯单程转化率达到最大值97%。Cu-Cr₂O₃催化剂的二氟乙酸甲酯加氢反应比速率随着铜含量的增加呈现增大的趋势,反应比速率的提高可能与催化剂中CuCr₂O₄和CuCrO₂物种的存在有关。

关键词: 二氟乙酸甲酯, 加氢, 二氟乙醇, Cr₂O₃, Cu

Abstract: Cu-Cr₂O₃ catalysts were prepared by the coprecipitation method.The effect of Cu content on catalytic performance for hydrogenation of methyl difluoroacetate to 2,2-difluoroethanol was investigated.The catalysts were characterized with XRD, H₂-TPR, BET and Raman techniques.The results showed that the reduced Cu-Cr₂O₃ catalysts contained mainly Cu and Cr₂O₃, while catalysts with a high Cu content (e.g.30 Cu-Cr₂O₃ and 50 Cu-Cr₂O₃) contained CuCr₂O₄ and CuCrO₂ oxides.It was also found that with increasing Cu content, conversion of methyl difluoroacetate first increased and then slightly decreased and selectivity to 2,2-difluoroethanol was about 70%.The 30Cu-Cr₂O₃ catalyst exhibited the highest conversion of 97%.In addition, conversion of methyl difluoroacetate increased gradually in bi-component Cu-Cr₂O₃ catalysts with increasing Cu content, which was probably due to the presence of CuCr₂O₄ and CuCrO₂ oxides.

Key words: methyl difluoroacetate, hydrogenation, 2,2-difluoroethanol, Cr₂O₃, Cu

中图分类号:

O643

曹晓雁, 郑素贞, 吴周安, 王树华, 周强, 鲁继青, 罗孟飞. Cu-Cr₂O₃催化剂上二氟乙酸甲酯催化加氢合成二氟乙醇[J]. 化工学报, 2013, 64(6): 2103-2108.

CAO Xiaoyan, ZHENG Suzhen, WU Zhouan, WANG Shuhua, ZHOU Qiang, LU Jiqing, LUO Mengfei. Cu-Cr₂O₃ catalysts for hydrogenation of methyl difluoroacetate to 2,2-difluoroethanol[J]. CIESC Journal, 2013, 64(6): 2103-2108.

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Cu-Cr₂O₃催化剂上二氟乙酸甲酯催化加氢合成二氟乙醇

Cu-Cr₂O₃ catalysts for hydrogenation of methyl difluoroacetate to 2,2-difluoroethanol

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