制备方法对焙烧态水铝钙石催化性能的影响
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TQ645.6

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Effect of Preparation Methods on Catalytic Performance of Calcined Hydrocalumite
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    摘要:

    分别采用清洁法和共沉淀法合成水铝钙石,再经400~800℃焙烧得到焙烧态水铝钙石催化剂。采用BET、XRD和CO2-TPD分别表征其比表面积、晶体结构、表面碱强度和碱量,并将其应用于催化合成单硬脂酸甘油酯(GMS)。其中,采用清洁法制备的焙烧态水铝钙石强碱中心的表面碱量相对较高,使其催化性能更优,且制备工艺简单,原子利用率高。在n(甘油):n(硬脂酸甲酯)=5.0:1、催化剂用量5%(以脂肪酸甲酯质量计)、200℃和5h的优化反应条件下,粗产物中GMS含量(高碘酸氧化法)高达82.7%。

    Abstract:

    Hydrocalumite was synthesized by the cleaning method and coprecipitation method, and then calcined at 400-800℃ to obtain a calcined hydrocalumite catalyst. The surface area, crystal structure, surface alkali strength and alkali amount were characterized by BET, XRD and CO2-TPD, respectively, and applied to the catalytic synthesis of glycerol monostearate (GMS). Among them, the surface of the calcined hydrocalumite strong base prepared by the clean method is relatively high, which has better catalytic performance, simple preparation process and high atomic utilization rate. Under the optimized reaction conditions of n (glycerol): n (methyl stearate) = 5.0:1, catalyst dosage 5% (based on the mass of fatty acid methyl ester), 200℃ and 5 h, the GMS content (periodic acid oxidation method) in the crude product was as high as 82.7%.

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周喜,何鹏,袁浩坤.制备方法对焙烧态水铝钙石催化性能的影响[J].精细化工,2019,36(12):

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  • 收稿日期:2019-03-06
  • 最后修改日期:2019-04-01
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  • 在线发布日期: 2019-11-06
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