【摘要】 研究Mg/Al复合氧化物(MAO)制备条件对其性能的影响,重点讨论了NaOH用量、阴离子含量、配料中Mg/Al比例、晶化时间等条件对MAO晶体结构、比表面积及表面碱度的影响,并考察了以MAO为催化剂、正辛醇为起始剂、环氧乙烷为聚合单体的乙氧基化聚合反应,通过对乙氧基化产品的定量分析,发现MAO针对环氧乙烷开环聚合反应具有较高的催化活性和选择性.催化剂用量为目标产物质量的100时,乙氧基化反应速率达到3.14gEO/(gcat·5min),所得产品的相对分子质量分布指数达到94.900,大大高于KOH催化所得产品62.7800的相对分子质量分布指数.更多还原

【Abstract】 The ethoxylation of n-octanol catalyzed by Mg/Al complex oxide（MAO） is researched. The synthesized MAO are characterized by X-ray diffration（XRD） and N₂ BET surface area method. The properties of complex oxides are examined by XRD and N₂ BET surface area method. The catalytic activity tests of MAO for ethoxylation of 1-octanol are carried out in 500 cm³ batchtype stirred pressure reactor with optimal conditions. The results showed that the most acticity of the MAO are 3.14 g_EO/(g_cat·5 min) （amount of catalysts is 1 wt⁰₀）. The molecular distribution of 1-octylethoxylate is analyzed by thin-layer chromatogram（TLC）, and it could find that the EO distribution index（EDI）of ethoxylated products catalyzed by MAO reach more than 90⁰₀, much greater than that by conventional KOH catalyst（62.78⁰₀） .更多还原