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Direct and Selective Gas-phase Hydration of Lower Olefin to Alcohol and Ketone

低级烯烃直接选择性气相水合制醇和酮

基本信息

批准号：
62550594
负责人：
IWAMOTO Masakazu
金额：
$ 1.22万
依托单位：
Miyazaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

Direct hydration of lower olefins on proton-exchanged zeolite catalysts has been studied in vapor or liquid phase and the following have been observed.1. In gas-phase hydration of propylene, l-btene, and iso-butene the reactivity of iso-butene was the highest. The yield of tert-butanol amounted to ca. 20% at 383 K. The zeolites with SIO_2/Al_2O_3 = 15-20 were the most active for the hydration. On the other hands, hydrative dehydrogenation of propylene or l-butene to give acetone or methyl ethyl ketone was found to proceed on ultra-stable Y-type zeolites(HUSY). Effort has been devoted to develop more active catalyst for the ketone formation and CAO/HUSY was concluded to be the best at the present.2. Liquid-phase hydration of iso-butene has been studied under both atmospheric pressure and high pressure. The activity and selectivity of the proton-zeolites were very high. For example, the conversion and selectivity to tert-butanol were 50% and 95%, respectively, on H-ZSM-5 at 383 K, 1.5 atm, and 30 min. The catalytic activity of the zeolites was dependent on the aluminum content; the zeolites with less amount of al showed higher activity.The results strongly suggest first that the proton-zeolites are better catalysts that other catalysts such as P_2O_5/SiO_2 and ion exchange resin, secondly than one might be able to get selectively tert-butanol in hydration of mixture of propylene and butenes.

本文研究了低碳烯烃在质子交换沸石催化剂上的气相和液相直接水合反应，主要内容如下：1.在丙烯、1-丁烯和异丁烯的气相水合反应中，异丁烯的反应活性最高。叔丁醇的收率约为100%。20%，383K。SiO_2/Al_2O_3 = 15-20的沸石对水化反应的活性最高。另一方面，丙烯或1-丁烯在超稳Y型分子筛（HUSY）上水合脱氢生成丙酮或甲乙酮。本论文的主要工作如下：1.开发了活性更高的催化剂，其中CAO/HUSY是目前最好的催化剂.在常压和高压下研究了异丁烯的液相水合反应。质子沸石的活性和选择性都很高。在383 K、1.5 atm、30 min条件下，H-ZSM-5上叔丁醇的转化率和选择性分别为50%和95%。结果表明，质子沸石是一种较好的催化剂，其催化活性优于P_2O_5/Al_2O_3催化剂。其次是SiO_2和离子交换树脂，它们可以在丙烯和丁烯混合物的水合反应中选择性地得到叔丁醇。