Performance of Fe3O4@SiO2 as the recyclable heterogeneous catalyst in the bisphenol A recovery from polycarbonate wastes

2019 ◽  
Vol 35 (2) ◽  
pp. 90-101
Author(s):  
Samira Emami ◽  
Mir Mohammad Alavi Nikje
Keyword(s):  
Bisphenol A ◽  
Heterogeneous Catalyst ◽  
Authentic Sample ◽  
Solvent System ◽  
Conventional Heating ◽  
Binary Solvent ◽  
Spectroscopic Methods ◽  
Heating Method ◽  
Recovery Yield ◽  
Recyclable Heterogeneous Catalyst

Received polycarbonate wastes from the used optical and digital optical disk (CDs and DVDs) were chemically recycled into bisphenol A (BPA) in 100% recovery yield using diethylene glycol/water as a binary solvent system and Fe3O4@SiO2 as the heterogeneous catalyst at the convenient, green and eco-friendly conditions using conventional heating method. The recovered BPA was analyzed by spectroscopic methods and data compared by an authentic sample.

Niobic Acid as a Recyclable Heterogeneous Catalyst for the Solvent-Free Synthesis of Substituted Benzimidazoles

2013 ◽  
Vol 1 (2) ◽  
pp. 136-144 ◽  
Author(s):  
Beatriz Vieira ◽  
Angelita Barcellos ◽  
Ricardo Schumacher ◽  
Eder Lenardao ◽  
Diego Alves
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Niobic Acid ◽  
Recyclable Heterogeneous Catalyst ◽  
Solvent Free Synthesis

High performance inkjet-printed QLEDs with 18.3% EQE: improving interfacial contact by novel halogen-free binary solvent system

Nano Research ◽  
2021 ◽  
Author(s):  
Ming Chen ◽  
Liming Xie ◽  
Changting Wei ◽  
Yuan-Qiu-Qiang Yi ◽  
Xiaolian Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Solvent System ◽  
Binary Solvent ◽  
Interfacial Contact ◽  
Halogen Free

Comparative study of conventional and microwave heating of polyacrylonitrile-based fibres

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Guozhen Zhao ◽  
Jianhua Liu ◽  
Lei Xu ◽  
Shenghui Guo
Keyword(s):  
Microwave Heating ◽  
Surface Defects ◽  
Energy Dispersive Spectrometer ◽  
Xrd Analysis ◽  
Economic Benefits ◽  
Heating Time ◽  
Oxidation Temperature ◽  
Conventional Heating ◽  
Heating Method ◽  
Molecular Arrangement

Abstract The effects of the conventional heating method and the microwave heating method on polyacrylonitrile-based fibres in the temperature range of 180–280 °C were investigated. Fourier transform infrared spectroscopy, X-ray wide-angle scattering, Raman spectroscopy, energy-dispersive spectrometer, scanning electron microscopy and bulk density were used to characterise the properties of the samples. Results show that the microwave heating method can shorten the pre-oxidation time, reduce pre-oxidation temperature and reduce the number of surface defects. The pre-oxidised fibres obtained by the microwave heating method exhibit not only good crystallite size but also a smooth surface. Atomic morphology and molecular arrangement are orderly inside the fibre. The FT-IR spectrum shows that the oxidation reaction occurs at 220 °C, and the CI value of PAN fibers stabilised by microwave heating is the larger than the fibers stabilised by conventional heating. XRD analysis shows that fibers stabilised by microwave heating have low stack domains. The SEM and Raman spectra indicate that hydrogen peroxide can improve the surface finish of the fibers and reduce defects. Microwave heating can reduce the pre-oxidation temperature by about 20 °C and shorten the heating time. The economic benefits of using this method are significantly improved.

scholarly journals Experimental and Computational Approaches for Solubility Measurement of Pyridazinone Derivative in Binary (DMSO + Water) Systems

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 171 ◽  
Author(s):  
Faiyaz Shakeel ◽  
Sultan Alshehri ◽  
Mohd Imran ◽  
Nazrul Haq ◽  
Abdullah Alanazi ◽  
...  
Keyword(s):  
Computational Model ◽  
Mole Fraction ◽  
Research Work ◽  
Solvent System ◽  
Binary Solvent ◽  
Thermodynamic Evaluation ◽  
Computational Approaches ◽  
Neat Water ◽  
Poorly Soluble ◽  
Binary Solvent Systems

The current research work was performed to evaluate the solubilization behavior, solution thermodynamics, and solvation behavior of poorly soluble pyridazinone derivative i.e., 6-phenyl-pyridazin-3(2H)-one (PPD) in various binary solvent systems of dimethyl sulfoxide (DMSO) and water using experimental and various computational approaches. The solubility of PPD in various binary solvent system of DMSO and water was investigated within the temperature range T = 298.2 K to 318.2 K at constant air pressure p = 0.1 MPa, by employing an isothermal technique. The generated solubility data of PPD was computationally represented by five different cosolvency models including van’t Hoff, Apelblat, Yalkowsky–Roseman, Jouyban–Acree, and Jouyban–Acree–van’t Hoff models. The performance of each computational model for correlation studies was illustrated using root mean square deviations (RMSD). The overall RMSD value was obtained <2.0% for each computational model. The maximum solubility of PPD in mole fraction was recorded in neat DMSO (4.67 × 10−1 at T = 318.2 K), whereas the lowest one was obtained in neat water (5.82 × 10−6 at T = 298.2 K). The experimental solubility of PPD in mole fraction in neat DMSO was much higher than its ideal solubility, indicating the potential of DMSO for solubility enhancement of PPD. The computed values of activity coefficients showed maximum molecular interaction in PPD-DMSO compared with PPD-water. Thermodynamic evaluation showed an endothermic and entropy-driven dissolution of PPD in all the mixtures of DMSO and water. Additionally, enthalpy–entropy compensation evaluation indicated an enthalpy-driven mechanism as a driven mechanism for the solvation property of PPD.

Silica-supported bismuth(III) chloride as a new recyclable heterogeneous catalyst for the Paal–Knorr pyrrole synthesis

2012 ◽  
Vol 708-709 ◽  
pp. 25-30 ◽  
Author(s):  
Kioumars Aghapoor ◽  
Leila Ebadi-Nia ◽  
Farshid Mohsenzadeh ◽  
Mina Mohebi Morad ◽  
Yadollah Balavar ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Recyclable Heterogeneous Catalyst

Biomass Waste-Derived Recyclable Heterogeneous Catalyst for Aqueous Aldol Reaction and Depolymerization of PET Waste

2021 ◽  
Author(s):  
Z. T Laldinpuii ◽  
C Lalmuanpuia ◽  
Samson Lalhmangaihzuala ◽  
Vanlalngaihawma Khiangte ◽  
Zodinpuia Pachuau ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Aldol Reaction ◽  
Orange Peel ◽  
Biomass Waste ◽  
Pet Waste ◽  
Recyclable Heterogeneous Catalyst

In this work, we discuss the valorization of biomass waste-derived orange peel ash (OPA) by exploring its applicability as a heterogeneous catalyst in aqueous aldol reaction and demonstrating its versatility...

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