| 酸催化二甘醇脱水环化反应研究 |
| |
| 引用本文： | 李肇凯. 酸催化二甘醇脱水环化反应研究[J]. 金山油化纤, 2006, 25(1): 8-12 |
| |
| 作者姓名： | 李肇凯 |
| |
| 作者单位： | 中国石化上海石油化工股份有限公司化工部 200540 |
| |
| 摘 要： | 以硫酸、磷钨酸、ZRP-5分子筛为催化剂,研究了二甘醇(DEG)脱水环化的反应规律。结果表明,DEG发生分子内脱水环化反应,生成1,4-二氧六环(DOX),DEG分子间脱水不仅可以生成四甘醇、六甘醇等,同时可生成三甘醇、五甘醇等一系列的多甘醇(PEG)。不仅DEG可以脱水环化生成DOX,在反应中生成的PEG也同样可以进行生成DOX的反应。对于二甘醇(DEG)脱水环化反应,硫酸是性能优良的催化剂,反应可以在较低的温度下进行,馏出产物中DOX选择性大于95％。
|
| 关 键 词： | 二甘醇 1 4-二氧六环 多甘醇 酸催化剂 脱水反应 |
| 修稿时间： | 2005-12-27 |
Study on Dehydration Reaction of DEG over Acid Catalysts |
| |
| Li Zhaokai. Study on Dehydration Reaction of DEG over Acid Catalysts[J]. Petrochemical Technology in Jinshan, 2006, 25(1): 8-12 |
| |
| Authors: | Li Zhaokai |
| |
| Abstract: | In this paper,the main reaction and by - reaction were studied for the synthesis of 1,4 - dioxane by cyclo-dehydration of DEG over H2SO4,H3PW12O40and ZRP-5 catalysts. Result showed that triethylene glycol,pen-taethylene glycol etc were also synthesized by intermolecular dehydration of DEG besides tetraethylene glycol, hexaethylene glycol etc. It suggested that DOX could also be synthesized from PEG produced herefrom with a relatively low selectivity. Sulfuric acid is a good catalyst in this reaction with a low reaction temperature and high selectivity over 95% for DOX. |
| |
| Keywords: | diethylene glycol 1 4 - dioxane PEG acid catalysts dehydration reaction |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
