α-磷酸锆@磺酸基固体酸催化剂的表征及其催化酯化反应的研究
Characterization of α-ZrP@SO3H solid acid catalyst and its catalytic performance in esterification
  
DOI:
中文关键词:  α-磷酸锆  KH-580  固体酸催化剂  酯化反应
英文关键词:α-ZrP  KH-580  solid acid catalyst  esterification
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Author NameAffiliation
SI Zhikun, FAN Mingming, ZHANG Pingbo,etc  
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中文摘要:
      以层状结构的α-磷酸锆为载体,用四正丁基氢氧化铵对其剥离改性,再连接上γ-巯丙基三乙氧基硅烷(KH-580),通过氧化和酸化两步,制备出一种新型的固体酸催化剂α-磷酸锆@磺酸基。通过XRD、SEM、BET、TGA、FT-IR等手段对该催化剂进行表征。结果表明:制备的催化剂比表面积增大,结晶度降低,酸强为2.43 mmol/g;FT-IR表征显示—SO3H的存在,证明α-磷酸锆被成功磺化。将该催化剂应用于月桂酸与甲醇的催化酯化反应中,对反应条件进行优化,发现在反应温度90?℃、反应时间5 h、酸醇摩尔比1∶?30、催化剂用量3%(以月桂酸质量计)时,酯化率达到97%以上。该催化剂使用3次后,仍然保持着较高的催化活性,酯化率为87.48%。
英文摘要:
      The layered α-ZrP was exfoliated by tetra-n-butylammonium hydroxide, masked as E-ZrP, then KH-580 was gifted on the surface of it, after oxidation and acidification, α-ZrP@SO3H was successfully prepared. The catalyst was characterized by XRD, SEM, BET, TGA and FT-IR. The results showed that the prepared catalyst had a larger specific surface area and a lower crystallinity, and its acid strength was 2.43 mmol/g. FT-IR analysis indicated that —SO3H was successfully gifted on α-ZrP. The catalyst was used in the esterification of lauric acid and methanol, and the esterification conditions were optimized as follows: temperature 90?℃, time 5 h, molar ratio of acid to methanol 1∶?30, catalyst dosage 3%(on the basis of lauric acid mass). Under the optimal conditions, the esterification rate was more than 97%. After used for three times, the catalyst still maintained high catalytic activity, and the esterification rate was 87.48%.
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