New soluble and insoluble Ta, Mo and Sb pentachloride complex catalysts have been prepared using pyridine and polymer supported cross-linked (poly-4-vinyl pyridine) beads (PSCPVP), respectively. The prepared catalysts are characterized with FTIR, SEM, EDAX, CHN and TGA. The catalytic activities of these catalysts have been examined for esterification of acetic acid with butanol through gas chromatographic technique. The soluble complex catalyst show better activity than the insoluble catalyst, but it suffers from recovery and recyclability. The insoluble catalysts maintain stability up to three recycle times. From the k_obs values, it is found that all the soluble catalysts of Py-MCl₅, M=Ta, Mo & Sb (k_obs=7.26, 5.48 & 1.47×10³ min^-1) showed higher catalytic activity than the insoluble PSCPVP-MCl₅ (k_obs=5.18, 2.24 & 0.87 x10³ min^-1)_, but the latter catalysts are superior to the former in terms of recyclability. The catalytic activity of soluble Py-TaCl₅, Py-MoCl₅, Py-SbCl₅ catalyst is found to be 1.40, 2.44 and 1.68 times higher than PSCPVP-TaCl₅, PSCPVP-MoCl₅ and PSCPVP-SbCl₅, respectively. PSCPVP-TaCl₅ catalyst is found to be the superior most catalyst among the three catalysts. Further, these catalysts can be used in column batch reactors to conduct the reaction in continuous mode.

中文翻译：

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高效可溶和聚合物交联的不溶聚-4-乙烯基吡啶金属（V）氯化物催化剂，用于丁醇与乙酸的酯化反应

分别使用吡啶和聚合物负载的交联（聚-4-乙烯基吡啶）珠（PSCPVP）制备了新的可溶和不可溶的Ta，Mo和Sb五氯化物络合物催化剂。通过FTIR，SEM，EDAX，CHN和TGA对制备的催化剂进行表征。已经通过气相色谱技术检查了这些催化剂的催化活性，以研究乙酸与丁醇的酯化反应。可溶性配合物催化剂显示出比不溶性催化剂更好的活性，但是它具有回收和可再循环性的缺点。不溶性催化剂维持高达三个循环时间的稳定性。从k _obs值可以发现Py-MCl _5的所有可溶性催化剂，M = Ta，Mo和Sb（k _obs = 7.26、5.48和1.47×10 ³ min^-1）显示出比不溶性PSCPVP-MCl ₅更高的催化活性（k _obs = 5.18，2.24 ＆0.87 x10 ³ min ^-1）_，但后者在可循环性方面优于前者。发现可溶性Py-TaCl ₅，Py-MoCl ₅，Py-SbCl ₅催化剂的催化活性分别是PSCPVP-TaCl ₅，PSCPVP- MoCl ₅和PSCPVP-SbCl ₅的1.40、2.44和1.68倍。五氯苯酚_五氯化碳发现催化剂是三种催化剂中最优越的催化剂。此外，这些催化剂可用于间歇式塔式反应器中以连续模式进行反应。