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Functionalized montmorillonite supported rhodium complexes: Efficient catalysts for carbonylation of methanol
Journal of Molecular Catalysis A: Chemical Pub Date : 2016 , DOI: 10.1016/j.molcata.2015.11.015
Pallab Kumar Saikia , Podma Pollov Sarmah , Bibek Jyoti Borah , Lakshi Saikia , Dipak Kumar Dutta

The catalyst precursors, [Rh(CO)2Cl-ligand(L)-APTMS-montmorillonite] (1a and 1b, where, a and b correspond to ligand (L)-APTMS-montmorillonite for ligands L = Quinoline-2-carboxylic acid (L1) and Quinoline-8-carboxylic acid (L2) respectively; APTMS = (3-aminopropyl)-trimethoxysilane), have been synthesised. The montmorillonite was activated by treating with formic acid under controlled condition to increase the surface area and pore volume prior to functionalization by APTMS and subsequent anchoring with the ligands. 1a and 1b were characterized by CHN, FT-IR, powder XRD, N2-sorption and SEM-EDX analysis. The efficacy of the catalysts was evaluated in carbonylation of methanol to acetic acid and found to exhibit catalytic conversion up to 99.9%. The catalysts were recovered and reused for several runs without any significant loss of catalytic efficiency.

中文翻译:

功能化蒙脱土负载的铑配合物:甲醇羰基化的高效催化剂

催化剂前体[Rh(CO)2 Cl-配体(L)-APTMS-蒙脱土](1a1b,其中ab对应于配体L =喹啉-2-羧酸的配体(L)-APTMS-蒙脱土分别合成了丙烯酸(L 1)和喹啉-8-羧酸(L 2); APTMS =(3-氨基丙基)-三甲氧基硅烷)。蒙脱土通过在受控条件下用甲酸处理以增加表面积和孔体积来活化,然后通过APTMS进行功能化并随后与配体锚定。图1a1b的特征是CHN,FT-IR,粉末XRD,N 2吸附和SEM-EDX分析。在甲醇羰基化为乙酸的过程中评估了催化剂的功效,发现其催化转化率高达99.9%。回收催化剂并将其重复使用几次,而不会显着降低催化效率。
更新日期:2017-01-31
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