超稳Y沸石负载杂多酸催化剂的制备、表征及催化性能Ⅱ.萘的异丙基化反应 |
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引用本文: | 武文良,刘琪英,王延儒,王军. 超稳Y沸石负载杂多酸催化剂的制备、表征及催化性能Ⅱ.萘的异丙基化反应[J]. 石油化工, 2003, 32(6): 453-457 |
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作者姓名: | 武文良 刘琪英 王延儒 王军 |
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作者单位: | 南京工业大学,化学化工学院,江苏,南京,210009 |
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基金项目: | 江苏省青年科技基金项目(BQ2000005),江苏省高技术研究项目(BG2001044) |
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摘 要: | 采用室温过量浸渍法制备了一系列超稳Y沸石负载的磷钨酸催化剂,详细考察了这类催化剂在萘的异丙基化反应中的催化性能,并与其它催化剂进行了比较。结果发现,超稳Y沸石负载10%的磷钨酸催化剂在433K的较低反应温度下具有较高的活性和选择性,其最佳活化温度为573K。使用过量的异丙醇和延长反应时间均使其转化率提高,而选择性仍然维持在较高水平。在相同的反应条件下,超稳Y沸石负载10%的磷钨酸较中孔分子筛MCM-41及SBA-15负载的磷钨酸催化剂具有更高的活性和相似的选择性。
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关 键 词: | 超稳Y沸石 磷钨酸 杂多酸 催化剂 萘的烷基化 2,6-二异丙基萘 |
文章编号: | 1000-8144(2003)06-0453-05 |
修稿时间: | 2002-12-24 |
Preparation,Characterization and Catalytic Behavior of Heteropoly Acid Immobilized on Ultra Stable Y Zeolite Ⅱ.Isopropylation of Naphthalene |
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Abstract: | Alkylation of naphthalene with isopropanol was investigated on ultr a stable Y (USY) zeolite supported 12-tungstophosphoric acid (PW) catalysts in hig h-pressure batch reactor.Comparative studies were also carried out on mesop orou s silica molecular sieves (MCM-41 and SBA-15) supported PW catalysts at the same reaction conditions as those for PW/USY catalysts.It was found 10%PW/USY with the activation temperature of 573 K exhibited higher catalytic activity than oth er PW/USY catalysts because of its larger acid amount and appropriate medium str ong acidity.Suitable reaction temperature was 433 K,and the molar ratio of na p hthalene,isopropanol and cyclohexane was 1/2/20.Compared with 40%PW/MCM-41 an d 50%PW/SBA-15,10%PW/USY exhibited higher catalytic activity with high selectivi ty. |
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Keywords: | zeolite ultra stable Y 12-tungstophosphoric acid heteropoly acid catalyst alkylation of naphthalene 2 6-diisopropylnaphthalene |
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