A5032050815- Thermal and Kinetic Analysis
- Chemical Synthesis and Reactions
- Chemical Thermodynamics and Molecular Structure
- Energetic Materials and Combustion
- Oxidative Organic Chemistry Reactions
- Mesoporous Materials and Catalysis
- Atmospheric chemistry and aerosols
- Catalysis and Oxidation Reactions
- Polymer Science and PVC
- Free Radicals and Antioxidants
- Polymer crystallization and properties
- Biodiesel Production and Applications
- Epoxy Resin Curing Processes
- Synthetic Organic Chemistry Methods
- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Risk and Safety Analysis
- Marine Sponges and Natural Products
- Porphyrin and Phthalocyanine Chemistry
- Inorganic and Organometallic Chemistry
- Photochemistry and Electron Transfer Studies
- Industrial Technology and Control Systems
- Layered Double Hydroxides Synthesis and Applications
Guangxi University
2021-2024
Material (Belgium)
2008-2011
Butylated hydroxytoluene (BHT) is an excellent antioxidant widely used in food, polymer materials, and other fields. In order to understand the hazards of BHT, it necessary study its thermal stability, oxidation properties, reaction products. This paper investigated BHT's characteristics products using a mini-closed pressure vessel test (MCPVT), UV radiation method, iodometric gas chromatography-mass spectrometry (GC–MS). The MCPVT results showed that no chemical BHT was observed under...
α-Pinene, β-pinene and turpentine are renewable resources that widely used in fine chemicals, fuels other applications, the safety of their production, transport use should be considered. In this work, characteristics hazardous oxidation process α-pinene, were investigated by using a novel mini closed pressure vessel testing system (MCPVT). The products resolved gas chromatography-mass spectrometry (GC-MS). results showed stable under nitrogen atmosphere very active chemically oxygen...
1,3-Butadiene is the simplest conjugated diene, which widely used in polymer materials, organic synthesis, and other fields. The investigation of its thermal stability oxidation characteristics necessary for production, transportation, use safety. pressure temperature behavior autoxidation reaction 1,3-butadiene with oxygen were determined using a custom-designed mini closed vessel test (MCPVT). effects free radical initiators CHP AIBN on investigated. decomposition products measured by...
Abstract 2,6-Di-tert-butyl-4-methylphenol (BHT) is an excellent antioxidant that easily oxidized to 2,6-di-tert-butyl-4-hydroperoxyl-4-methyl-2,5-cyclohexadienone (BHTOOH). For the safety of BHT production and usage, it meaningful study thermal stability decomposition properties BHTOOH. In this paper, BHTOOH were compared by mini closed pressure vessel test (MCPVT) differential scanning calorimetry (DSC). Their kinetics studied using thermogravimetric analysis (TGA). The products analyzed...
Although pinane has a wide range of uses, there are no reports on the safety oxidation. The thermal oxidation properties were investigated through MCPVT. primary products separated and structurally characterised, its decomposition assessed by MCPVT DSC. results showed that had an initial oxygen uptake temperature 123.5 °C exploded when rose to 132.7 °C. Pinane autoxidised at 110 for 9 h formed high level peroxide (81.18 mmol/kg) with activation energy 138.77 kJ/mol. occurs mainly tertiary...
Abstract: The synthesis costs of macrolide musks are higher than those other commercial musks. To make this process less expensive, eggshell waste was calcined at a low temperature to obtain catalyst for the cyclopentadecanolide production via reactive distillation using glycerol entrainer. X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission and photoelectron spectroscopy analyses original recovered catalysts revealed that main catalytic...
It has been a challenge to synthesize macrolide musk in excellent yields with high purity. KF-La/γ-Al2O3 catalyst was prepared from highly basic mesoporous framework using mild method. The employed for the synthesis of cyclopentadecanolide methyl 15-hydroxypentadecanoate. morphology and structure catalysts were characterized XRD, TG-DTG, SEM, EDX, TEM, BET CO2-TPD. results revealed that K3AlF6 LaOF are produced on surface KF-La/γ-Al2O3, LaO can promote dispersion KF Al2O3. Catalysts pore...
Copper(II)-containing aluminum phosphate material (CuAPO-5) was synthesized hydrothermally and used as a multiphase catalyst for the oxidation of α-pinene to verbenone. The catalysts were analyzed using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area techniques, photoelectron spectroscopy (XPS), ammonia temperature programmed reduction (NH3-TPD). Scanning electron microscopy (SEM), energy spectrometry (EDS), inductively coupled plasma emission (ICP-OES), Fourier infrared...
Abstract In this study, the oxidation characteristics of isoprene were investigated using a custom-designed mini closed pressure vessel test (MCPVT). The results show that is unstable and polymerization occurs under nitrogen atmosphere. Under an oxygen atmosphere, process was divided into three stages: (1) reacts with to produce peroxide; (2) Peroxides free radicals through thermal decomposition; (3) Free cause complex runaway reactions. conforms second-order reaction kinetics, activation...
A new attempt to investigate the thermal stability and reactivity of four 3-phenyl-2-propene compounds with oxygen by MCPVT has been reported.
<title>Abstract</title> 2,6-Di-tert-butyl-4-methylphenol (BHT) is an excellent antioxidant that easily oxidized to 2, 6-di-tert-butyl-4-hydroperoxyl-4-methyl-2, 5-cyclohexadienone (BHTOOH). For the safety of BHT production and usage, it meaningful study thermal stability decomposition properties BHTOOH. In this paper, BHTOOH were compared by mini closed pressure vessel test (MCPVT) differential scanning calorimetry (DSC), their kinetics studied using thermogravimetric analysis (TGA). The...
The reaction process of gaseous 1,3-butadiene following ultraviolet irradiation at the temperature range from 298 to 323 K under nitrogen atmosphere was monitored by UV-vis spectrophotometry. A mini-reactor used as a vessel and could be directly in spectrophotometer. We investigated reactivity kinetics non-UV UV evaluate its photochemical stability. second-order kinetic model with 50.48 kJ·mol-1 activation energy fitted data for irradiation, whereas first-order appropriate case energies...