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1992 articles for “Keywords”
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UNIT OPERATIONS IN CHEMICAL INDUSTRIES
Abstract: The unit operation like distillation, absorption, evaporation, filtration, drying, etc. are most important factors. Distillation is a purification method for liquids and can separate components of a mixture if they have significantly different boiling points. Absorption is a physical or chemical phenomenon. Evaporation can be defined as the process where liquid is transformed into a gaseous state. Evaporation can occur only when water is available. Drying is an important unit …
Published in International Journal of Environmental Chemistry · Vol. 5, Issue 2, 2019 · pp. 11–29 Read article
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Removal of Methyl Orange from Wastewater Using Composite Material
Abstract: The textile industry is one of the pollute activities that most consume water. Industrial dyes are dangerous pollutants, resulting from the textile industry. The textile dyes significantly increase inhibit plant growth, enter the food chain, promote toxicity, and carcinogenicity. The removal of textiles dyes is usually proposed via adsorption represents a sustainable solution. A composite material was prepared by polystyrene in combination with commercial activated carbon. A series of experiments …
Published in International Journal of Environmental Chemistry · Vol. 6, Issue 1, 2020 · pp. 42–46 Read article
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Nanocoating and Electrospraying Techniques Used for Corrosion Mitigation of Aluminum in Nitrogen dioxide Environment
Abstract: Nitrogen gas absorbs moist air to produce nitric acid. It develops acidic medium for aluminum. It forms a corrosion cell on the surface of aluminum. The formation of corrosion cell is written as: Al|Al+3||H+|H2 thus Corrosion reactions accelerate on aluminum surface and Al is oxidized into Al+3 and the H+ ions is reduced into H2. This acid produces various forms of corrosion in aluminum like galvanic, pitting, stress, crevice, blistering, …
Published in International Journal of Environmental Chemistry · Vol. 6, Issue 2, 2020 · pp. 20–31 Read article
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SOCIO-ECONOMIC IMPACT AND ENVIRONMENTAL HAZARDS OF OIL PALM MILL INDUSTRY ON THE RESIDENTS IN DARU AND YENGEMA, JAWI CHIEFDOM, KAILAHUN DISTRICT SIERRA LEONE
Abstract: The oil palm industry's socioeconomic impact and risk to human health evaluation were quantitative and descriptive cross-sectional studies to determine the oil palm industry's socioeconomic influence on local communities and risk to human health in the surrounding area. The two residents of the study site were chosen at random. The study included 51 respondents in total. Questionnaires and key informant interviews were used to generate the results. The outcomes of …
Published in International Journal of Environmental Chemistry · Vol. 9, Issue 1, 2023 · pp. 24–33 Read article
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Mechanical Studies and Thermal Kinetics of Isoniazid Crystals
Abstract: Single crystals of isoniazid were crystallized by slow solvent evaporation method. The crystal structure was confirmed using single crystal X-ray diffraction analysis. Micro hardness was estimated and work hardening coefficient and Newtonian resistance pressure of the crystal were determined. Kinetic analysis of the thermogravimetric data was carried out by using Coats-Redfern relation. Activation energy, frequency factor and order of reaction were also calculated. Arrhenius equation for isoniazid is k=0.43×105e–79103/RT mol–1s–1. …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 1, Issue 1, 2015 Read article
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Design and Pinch Analysis of Styrene Production Process Using Aspen HYSYS and Aspen Energy Analyzer
Abstract: This paper presents the design and energy analysis of styrene production process. Process flow diagram is designed using Aspen HYSYS. Styrene product obtained is of purity 73% and further purity is recommended. Pinch analysis is applied to the process plant by using Aspen Energy Analyzer, as a part of that in the first step all the stream data is extracted, in the second step heat exchanger networks (HEN) is developed …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 1, Issue 1, 2015 Read article
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Development of Geo-Polymer based Light Weight Bricks
Abstract: Light weight geopolymer bricks were developed during this study. The mix was made with lime sodium silicate and fly ash as ingredients. A maximum shrinkage was observed at CaO lime ratio of 1.0. Bulk densities were also lower at the ratio of 1.0. The maximum cold crushing strength (CCS) value was found at the ratio of 0.745. Increase in mix water decreased the strength. Water content of 24% is recommended …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 1, Issue 1, 2015 Read article
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Preparation and Characterisation of the Schiff’s Base Complex [Pt(dpq)Cl2]
Abstract: Preparation of platinum complex [Pt(dpq)Cl2] and characterization of the complex by IR, UV, CHN and NMR techniques. DPQ ligand is obtained by 1,10 phenanthroline made react with NaBr, nitrating mixture followed by ethylenediamine in ethanol. Keywords: DPQ, intercalator, platinum complex, Schiff’s base
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 1, Issue 2, 2015 Read article
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Synthesis and Characterization of Cadmium exchanged Sodalite
Abstract: Cadmium derivative of chloro sodalite, has been synthesized at low temperature by hydrothermal method. The sodalite is characterized by IR, X-ray powder diffraction and SEM. The Cd derivative was obtained by facile exchange of cadmium for sodium in chloro sodalite using a solution of cadmium nitrate in Teflon autoclaves at 100oC. The IR spectra of parent gallo silicate chloro sodalite and cadmium exchanged chloro sodalites shows three kinds of IR …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 1, 2016 Read article
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Preparation and Characterization of Ce-Si-SBA-15 Modified With Iron
Abstract: Recently environmental concerns have driven the development of specialized catalysts to prevent polluting substances from being released into the environment. New technologies have improvised our understanding of catalytic functions as well as selectivity in order to save the energy and chemicals. Today, catalysis is the workhorse in the chemical industry with approximately >90% of the products produced in catalytic processes. In addition, life cannot exist without catalysis, as virtually all …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 1, 2016 Read article
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Studies on Zirconium(IV) Telluroiodate: A New Heteropolyacid Based Inorganic Ion Exchange Material
Abstract: Zirconium (IV) telluroiodate has been synthesized as a new inorganic cation exchanger by adding a mixture of aqueous solution of 0.1 M potassium iodate and 0.1 M sodium tellurite to aqueous solution of 0.1 M zirconium (IV) oxychloride under varying mixing ratios at pH 1. Its ion exchange capacity for Na+ was found to be 1.85 meqg1 of dry exchanger. The material has been characterized on the basis of chemical …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 1, 2016 Read article
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The Thermodynamic Studies of Derivative of Thiabendazole in 1, 4 Dioxane System in the Temperature Range 303 to 323 K
Abstract: Densities, viscosities of some derivatives of thiabendazole in 1, 4 dioxane were measured in the temperature range 303 to 323 K. The viscosity was determined by John-Dole equation. The data has been used to calculate thermodynamic parameters. G and H are negative and S is positive which indicate the spontaneity of reaction according to thermodynamics. Keyword: thermodynamic parameters, free energy change, enthalpy change, entropy change
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 1, Issue 1, 2015 Read article
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Synthesis, Spectral and Magnetic Moment Studies of Mixed Ligand Complexes of Hydroxamic Acids with Potassium Hexathiocyanato Vanadium (II) Tetra Hydrate
Abstract: Preparation and characterization of several hydroxamic acids of 3,4,5-trimethoxy benzohydroxamic acids(TMBHA), N-phenyl–3,4,5-trimethoxy benzohydroxamic acid(PTMBHA), 3,4-dimethoxy benzohydroxamic acid(DMBHA) and N-phenyl-3,4-dimethoxy benzohydroxamic acid(PDMBHA) were prepared and reacted with potassium hexathiocynato vandate (II) K4[V(NCS)6].3H2O tetra hydrate. The mixed ligand complexes of hydroxamic acids characterized with the help of repeated melting point identification, by I.R. studies, magnetic moment, molar conductance’s and by elemental analysis (C, H and N). The geometry of complexes were found …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 2, 2016 Read article
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SYNTHESIS AND CHARACTERIZATION OF MIXED LIGAND COMPLEXES OF HYDROXAMIC ACIDS WITH POTASSIUM HEXATHIOCYANATO CHROMIUM (III) TETRA HYDRATE
Abstract: Some hydroxamic acids eg.[L1= benzohydroxamic acids (BHA), L2= N-phenyl– benzohydroxamic acid (NPBHA), L3= pivaloyl benzohydroxamic acid (PHA) and L4=N-phenyl-pivaloyl benzohydroxamic acid (PPHA) prepared and reacted with L’=Potassium hexathiocynato chromium (III) tetra hydrate K3[Cr(SCN)6]4H2O.The mixed ligand complexes of hydroxamic acids characterized with the help of repeated melting point, by I.R. studies, magnetic moment, molar conductance and by elemental analysis(C,H and N).The stoichiometry of the complexes were found to be 1:2(M:L) molar …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 2, 2016 Read article
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Synthesis, Spectral characterization and biocidal activities of Triphenyl antimony (V) halide and methoxide complexes
Abstract: The schiff base ligands N-mono(salicyclidene)-σ-phenylenediamine (spdH) and N-mono(2-hydroxy-1-naphthalidene)-σ-phenylenediamine (hnpdH) and their triorganoantimony (V) complexes were synthesized by conventional method, were characterized by UV, IR and 1H NMR spectral studies which proposed that in the complexes of the ligands spdH and hnpdH, antimony is seven coordinated and in sp3d3 hybridization state with pentagonal bipyramidal geometry. Keywords: halide, methoxide complexes, triphenylantimony (V)
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 3, Issue 1, 2017 Read article
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Anti-tubercular activity of dioxo molybdenum (VI) metal complexes of 2-((E)-(1,5-dimethyl-2-phenyl-3-((Z)-(quinoline-8-ylimino)methyl)-2,3-dihydro-1H-pyrazole-4-ylimino)methyl)phenol
Abstract: Dioxomolybdenum(VI) complexes tetradentate ligand 2-((E)-(1,5-dimethyl-2-phenyl-3-((Z)-(quinoline-8-ylimino)methyl)-2,3-dihydro-1H-pyrazole-4-ylimino)methyl)phenol was synthesized by conventional method The ligands and their MoO22+ complexes have been characterized on the basis of elemental analysis, electronic. I.R., 1H and 13C-NMR spectral method, by their spectral studies, octahedral geometry of the complex has been proposed. On evaluation of in-vitro antitubercular activity of the ligand and dioxo Mo(VI) metal complex found that complex is more potent antitubercular agent than ligand. Keywords: anti-tubercular …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 3, Issue 1, 2017 Read article
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Preparation and Characterization of Mixed Ligand Complexes of Cobalt(II) and Ni(II) salt of Phthalimide with Some Oxamic Acids
Abstract: The mixed ligand complexes of oxamic acids with Co(II) and Ni(II) salt of phthalimide were prepared, where oxm= N-phenyl thio urea oxamic acid(NPTUOA),m-tolumide oxamic acid (m-TOA), N-pyrrazole oxamic acid & phth= Co(II) and Ni(II) salt of phthamlimide. These all mixed ligand complexes examined by their elemental analysis, melting points, UV-visible analysis, I.R studies, magnetic susceptibility measurements and thin layer chromatography. Elemental analysis of the complexes shows 1:2 (Metal:Ligand) stiochiometry for …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 3, Issue 1, 2017 Read article
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Identifying Chemical Combination in Consumer Products – A Report
Abstract: Chemical are both helpful as well as harmful. When used cautiously under preset and standardized protocols, they carry out several chemical reactions and synthesis. However, many of the products synthesized using chemicals have harmful effects. Many of the everyday use products such as cosmetics, detergents, toothpaste, etc., are composed of chemicals about which we are not aware of. These have several harmful side-effects and long term health issues associated with …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 2, 2016 Read article
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Successful Synthesis of Organic Molecules with Increased Conductivity and Durability
Abstract: Organic molecules are central to biological and chemical systems. Organic molecules are mainly composed of hydrogen and carbon. These constitute the building blocks for all living organism. Chemists and scientist are curious in synthesizing organic molecules that have increased conductivity and durability. Several techniques have been developed and modified to achieve this target. A novel method has been discussed for synthesis of organic molecules with enhanced conductivity and durability. Keywords: …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 2, Issue 2, 2016 Read article
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Effect of TiO2 on HER Activity of Electrodeposited Zn–Ni Coatings
Abstract: This paper demonstrates the improved electrocatalytic behavior of Zn–Ni alloy coatings for alkaline hydrogen evolution reaction (HER), due to addition of TiO2 nanoparticles into the bath. Zn–Ni alloy coatings have been electrodeposited galvanostatically on copper, with wide compositional range (2.31–7.91 wt. % of Zn) at different current densities (c.d.) between 2.0 and 5.0 A dm-2. The electrocatalytic behaviors of all coatings have been studied for alkaline HER in 1.0 M …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 3, Issue 1, 2017 Read article