| 不同类型分子筛对甲缩醛的催化性能 |
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| 引用本文： | 王淑娟,陶克毅. 不同类型分子筛对甲缩醛的催化性能[J]. 吉林大学学报(理学版), 2002, 40(3): 320-323 |
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| 作者姓名： | 王淑娟 陶克毅 |
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| 作者单位： | 1． 锦州师范学院化学系， 锦州 121003； 2． 南开大学化学系， 天 津 300071 |
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| 摘 要： | 在间歇反应方式下， 研究了以甲醛和甲醇为原料合成甲缩醛反应所需的催化剂. 在30 ℃， 醛醇摩尔比为1∶2， 加入5%（质量分数）的催化剂条件下， 考察了HY， HM ， Hβ， γ-Al2O3和 HZSM-5等催化剂对该合成反应的催化效果， 从中优选出HZSM-5. 进一步对不同硅铝比和 不同交换度的HZSM-5进行评价. 实验结果表明， 硅铝比为38， 交换4次的HZSM-5分 子筛对该 合成反应具有良好的催化作用， 甲醛的转化率为45%， 甲缩醛的选择性达99%. 该催化剂经 20次重复使用， 甲醛的转化率、 甲缩醛的选择性无明显变化， 表现出良好的催化稳定性 .
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| 关 键 词： | 有机合成 甲缩醛 催化剂 评价 |
| 文章编号： | 1671-5489(2002)03-0320-04 |
| 收稿时间： | 2000-01-29 |
| 修稿时间： | 2002-01-29 |
Studies on Catalytic Properties of Different Types of Molecular Sieves for Synthesis of Methylal |
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| WANG Shu-juan,TAO Ke-yi. Studies on Catalytic Properties of Different Types of Molecular Sieves for Synthesis of Methylal[J]. Journal of Jilin University: Sci Ed, 2002, 40(3): 320-323 |
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| Authors: | WANG Shu-juan TAO Ke-yi |
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| Affiliation: | １． Department of Chemistry, Jinzhou Teacher＇ College, Jinzhou 121003, China; ２． Department of Chemistry, Nankai University, Tianjin 300071, China |
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| Abstract: | The synthesis of methylal from methanol and methanal over different types of molecular sieves was studied. A batch reactor was employed. In a molar ratio of 1∶2 of methanal to methanol and in the presence of 5%(mass fraction) the cata lyst, five sorts of catalysts (HZSM-5, HY, HM, Hβ and γ-Al2O 3) were tested at 30 ℃, among them, HZ SM-5 showed the best catalytic activity. HZSM-5 with 38∶1 of Si to Al and 4 of exchange degree was extremely effective for this reaction. The conversion rate of mathanal was 45% and the selectivity of methylal was 99%, both the conversion rate and the selectivity were reproducible after th e catalyst was reused for 20 times. |
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| Keywords: | organic synthesis methylal catalyst evaluate |
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