【摘 要】
：
Yttrium isopropoxide was prepared directly by the reaction between yttrium and isopropyl alcohol using mercuric chloride and iodine as catalyst. Yield is above
【出 处】
：
Journal of Wuhan University of Technology-Materials Science
论文部分内容阅读
Yttrium isopropoxide was prepared directly by the reaction between yttrium and isopropyl alcohol using mercuric chloride and iodine as catalyst. Yield is above 83% . This method possesses the merits of easy operational approach, high product purity, high reaction rate and high production rate. Compared with the previous reported results , the period needed was shortened by 19 h and the yieid increased by 8% . The period needed for preparation is about 5 hows. These results are better than the present report . The dehydrolysis method of isopropyl alcohol and the composition of catalyst were presented.
Yttrium isopropoxide was prepared directly by the reaction between yttrium and isopropyl alcohol using mercuric chloride and iodine as catalyst. Yield is above 83%. This method possesses the merits of easy operational approach, high product purity, high reaction rate and high production rate with the previous reported results, the period needed was shortened by 19 h and the yieid increased by 8%. The period needed for preparation is about 5 hows. These results are better than the present report. The dehydrolysis method of isopropyl alcohol and the composition of catalyst were presented.
其他文献
摘 要： 《初级汉语》是中泰合编教材，在泰国汉语教学中使用较为广泛。本文旨在对《初级汉语（一）》进行内部评价，主要从课文、生词、语法、练习等方面进行考察，目的是为泰国教师和学生选择汉语教材提供依据和参考，也为该教材的修订提供一些思路及建议。 关键词： 内部评价；课文；生词；语法；练习 汉语热日渐升温，学汉语的人越来越多，有一本好的汉语教材可以起到事半功倍的效果，当前的汉语教材多种多样，各有特色
长江是我们伟大祖国的大动脈,它从我国西南山地经三峡流入江汉平原。宜昌以下可行大轮船,浅水轮船可直达重庆。它的中游下游地区都是我国的鱼米
The Yangtze River is the
今人常将凭空诬陷的现象名之日“莫须有”。这里,“莫须有”已凝固为一个典故词了。然而,它最初却是一个短语,状中结构。它出自南宋抗金名将岳飞冤屈遇害这么一个故实。该故
肿瘤血管生成与肿瘤的发生、发展和转移的全过程密切相关。肺癌的血管生成也受血管形成促进、抑制因素的影响。肺癌细胞通过合成、分泌血管生成因子调节肿瘤组织的血管生成,
Ｒｕｓｓｉａｐｏｓｓｅｓｓｅｓｅｘｃｌｕｓｉｖｅｌｙｌｉｍｉｔｅｄ (ａｂｏｕｔ 5%ｏｆｔｈｅｔｏｔａｌｗｏｒｌｄａｍｏｕｎｔ) ｐｅｔｒｏｌｅｕｍｒｅｓｏｕｒｃｅｓ,ｂｕｔｉｔｈａｓｃｏｎｓｉｄｅｒａｂｌｙｌａｒｇｅｒｓｕｐｐｌｉｅｓｏｆｎａｔｕｒａｌｇａｓ
Russiapossessesexclusivelylimited (about 5% ofthetotalworldamount) petroleumresources, butithasconsiderablylargersupplies
从＂切块分包＂到总部自营国际承包工程项目实施管理的一个成功实例陆国俊（中国水利电力对外公司）【编者按】国际工程承包业务有两个重要步骤：一是通过参与激烈的国际投标竞争．拿到工
By a sequentially selective extraction procedure, polysaccharides (PS) from cyanobacterium Spirulina (Arthrospira) maxima that can be bio functionally
通常重力坝上游和下游坡度保持一个固定的数值,但在无损于坝的安全下有可能使其坡度改变,以减少使用材料的数量。本文叙述其论点并制定出最优值计算程序,以补充数年前在本刊
Polarization curves of copper were measured in NH 3·H 2O media containing K 3Fe(CN) 6. Components of passive film were analyzed by XPS. Relation of polishi
Thank you very much indeed.And thank you also for the opportunity of speak-ing to all of you this morning.I look for
Thank you very much indeed. And thank you