Transition metal-substituted Keggin-type polyoxometalates as catalysts for adipic acid production

IF 0.125 Applied Petrochemical Research Pub Date : 2019-04-09 DOI:10.1007/s13203-019-0226-0

Sihem Mouanni, Dahbia Amitouche, Tassadit Mazari, Cherifa Rabia

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引用次数: 12

Abstract

The adipic acid (AA) production was carried out in two stages: oxidation of cyclohexanone (-one) by Keggin-type polyoxometalate (POM), followed by oxidation of this latter by hydrogen peroxide. The process lasts 20?h and the temperature is maintained at 90?°C. AA is then recovered by cold crystallization (4?°C). The POMs have as formula HMPMo₁₂O₄₀ (M:Co, Ni, Mn, Cu or Zn). The materials were characterized by FT-IR and UV–Vis spectroscopies and by thermogravimetric analysis. The purity of adipic acid was confirmed by FT-IR and ¹³C and ¹H NMR analysis. The effects of POM composition, catalyst/-one molar ratio and the cyclohexanol addition to -one on adipic acid yield were examined. The whole catalysts were found to be effective toward cyclohexanone oxidation and the highest yield (53%) was obtained with HZnPMo₁₂O₄₀ system for a catalyst/-one molar ratio of 1.89?×?10^?3. The alcohol addition to -one has a negative effect on adipic acid formation.

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过渡金属取代keggin型多金属氧酸酯制备己二酸的催化剂

己二酸(AA)的生产分两个阶段进行:keggin型多金属氧酸酯(POM)氧化环己酮(- 1)，然后过氧化氢氧化后者。这个过程持续20?h，温度保持在90℃。然后通过冷结晶(4°C)回收AA。其分子式为HMPMo12O40 (M:Co, Ni, Mn, Cu或Zn)。用红外光谱、紫外可见光谱和热重分析对材料进行了表征。通过FT-IR、13C和1H NMR分析证实了己二酸的纯度。考察了POM组成、催化剂/- 1摩尔比和环己醇加成- 1对己二酸产率的影响。结果表明，在催化剂/摩尔比为1.89 × 10时，HZnPMo12O40体系的环己酮氧化收率最高，达到53%。乙醇加入- 1对己二酸的形成有负面影响。

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来源期刊

Applied Petrochemical Research ENGINEERING, CHEMICAL-

自引率

0.00%

发文量

审稿时长

13 weeks

期刊介绍： Applied Petrochemical Research is a quarterly Open Access journal supported by King Abdulaziz City for Science and Technology and all the manuscripts are single-blind peer-reviewed for scientific quality and acceptance. The article-processing charge (APC) for all authors is covered by KACST. Publication of original applied research on all aspects of the petrochemical industry focusing on new and smart technologies that allow the production of value-added end products in a cost-effective way. Topics of interest include: • Review of Petrochemical Processes • Reaction Engineering • Design • Catalysis • Pilot Plant and Production Studies • Synthesis As Applied to any of the following aspects of Petrochemical Research: -Feedstock Petrochemicals: Ethylene Production, Propylene Production, Butylene Production, Aromatics Production (Benzene, Toluene, Xylene etc...), Oxygenate Production (Methanol, Ethanol, Propanol etc…), Paraffins and Waxes. -Petrochemical Refining Processes: Cracking (Steam Cracking, Hydrocracking, Fluid Catalytic Cracking), Reforming and Aromatisation, Isomerisation Processes, Dimerization and Polymerization, Aromatic Alkylation, Oxidation Processes, Hydrogenation and Dehydrogenation. -Products: Polymers and Plastics, Lubricants, Speciality and Fine Chemicals (Adhesives, Fragrances, Flavours etc...), Fibres, Pharmaceuticals.