A5042112514- Polyoxometalates: Synthesis and Applications
- Chemical Synthesis and Reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Vanadium and Halogenation Chemistry
- Catalysis and Oxidation Reactions
- biodegradable polymer synthesis and properties
- Advanced Nanomaterials in Catalysis
- Multicomponent Synthesis of Heterocycles
- Oxidative Organic Chemistry Reactions
- Synthesis and biological activity
- Recycling and utilization of industrial and municipal waste in materials production
- Lubricants and Their Additives
- Enzyme Catalysis and Immobilization
- Asymmetric Hydrogenation and Catalysis
- Microwave-Assisted Synthesis and Applications
- Synthesis of Organic Compounds
- Catalysis and Hydrodesulfurization Studies
- Synthesis of Tetrazole Derivatives
- Magnesium Oxide Properties and Applications
- Nanomaterials for catalytic reactions
- Supramolecular Chemistry and Complexes
- Building materials and conservation
Mouloud Mammeri University of Tizi-Ouzou
2013-2023
University of Sciences and Technology Houari Boumediene
2013-2023
University of Algiers Benyoucef Benkhedda
2019-2023
Laboratoire de Chimie
2009-2022
Laboratoire de Chimie Physique
2008
The adipic acid (AA) production was carried out in two stages: oxidation of cyclohexanone (-one) by Keggin-type polyoxometalate (POM), followed this latter hydrogen peroxide. process lasts 20 h and the temperature is maintained at 90 °C. AA then recovered cold crystallization (4 °C). POMs have as formula HMPMo12O40 (M:Co, Ni, Mn, Cu or Zn). materials were characterized FT-IR UV–Vis spectroscopies thermogravimetric analysis. purity confirmed 13C 1H NMR effects POM composition, catalyst/-one...
Abstract Cobalt supported on alumina (10 wt% Co/Al
The aim of this work is to reuse the mineral wastes (glass, brick, and clay) produce granulated foam glass at different characteristics. For this, three types were manufactured a temperature 850°C from (cullet), brick wastes, clay, limestone as foaming agent. First, obtained used by substitution fine aggregates in mortar. Physical (flow, density, porosity), mechanical tests (compressive strength) carried on glass-based mortars. Second, glasses based waste also coarse manufacture insulating...
Tin (antimony) substituted and lacunar Dawson phosphotungstomolybdates (a1-K10P2W12Mo5ÿO61, a1-K8P2W12Mo5SnO61 a-Cs4SnP2W12Mo6O62,and a-Cs3SbP2W12Mo6O62) were synthesized characterized by Fourier Transform Infra Red (FTIR), nuclear magnetic resonance (31P NMR), Visible Ultra Violet (UV-Vis) spectroscopy, X-ray diffraction (XRD). Their catalytic properties examined in the oxidation reaction of cyclohexanone at 90 °C that cyclohexene 70 to adipic acid (AA), presence hydrogen peroxide free...
The adipic acid (AA), important precursor for Nylon production, was synthesized from cyclohexanoneoxidation by two ways, microwaves irradiation and conventional method (under reflux) using H3PMo12O40 heteropolyacid as catalyst in the presence of hydrogen peroxide. In order to increase AA yield, several parameters cyclohexanone/catalyst ratio, H2O2 concentration, solvent nature (H2O, CH3CO2H, CH3OH, CHCl3 CH3CN) cyclohexanol addition cyclohexanone were examined. For both activation modes,...
The oxidation of cyclohexanone and/or cyclohexanol to adipic acid (AA) was performed at 90 °C with a reaction time 20 h, in the presence H2O2 as oxidant and transition metal substituted ammonia polyoxometalates formula, (NH4)xHyMzPMo12O40 (M: Fe, Co, or Ni, x = 2.5 2.28) catalysts. catalytic results showed that AA yield is sensitive nature conditions (sample weight substrate amount). (NH4)2.29H0.39Co0.16PMo12O40 found be better system toward synthesis from oxidation, 40%
Polyoxometalates (POMs), based transition-metal oxide clusters, have received much attention in various fields such as catalysis, photochemistry, nonlinear optics, biology and medicine [1]. Their physico-chemical, acidic oxidative properties can be adjusted according with the nature of constituent elements [2]. In field most studied POMs are those Keggin. They were tested wide variety reactions homogeneous heterogeneous phases. redox processes, counter- cation [PMo12O40]3− system play a...