4^th International Conference on Past and Present Research Systems of Green Chemistry October 16-18, 2017 Atlanta, Georgia, USA

Biography:

Jenifer J Gabla has obtained her MSc degree in Organic Chemistry, in the year 2013 from Uka Tarsadia University, Bardoli, Gujarat. She is currently pursuing her PhD in the area of solid acid catalyzed multicomponent reactions for the synthesis of biologically active drug molecules, at Applied Chemistry Department (ACD), S. V. National Institute of Technology (SVNIT) under the guidance of Kalpana Maheria, Assistant Professor & Head, ACD, SVNIT, Surat, Gujarat, India. Her research focuses on development of novel zeolite based catalytic materials and exploring their utility in the green process development for the synthesis of medicinal compounds. She has presented her research in several national and international conferences.

Abstract:

The mesoporous zeolite BEA (MZB or BEA/MCM-41 composite) material with bimodal pore structure, acidity and surface area has been synthesized by using zeolite BEA as silica-alumina source. The material was characterized by various techniques such as powder SAXS/WAXS, N₂ adsorption-desorption isotherm, NH₃-TPD, ICP-OES, TGA-DTA, FT-IR, Pyridine IR, SEM, TEM, ²⁷Al and ²⁹Si NMR. Powder SAXS/WAXS showed the existence of well-structured microphase of zeolite BEA and mesophase of MCM-41 in the composite materials. In addition, the significant improvement in the catalytic properties of MZB material was investigated for the synthesis of various biologically active compounds through multi-component reactions (MCRs). The MZB material display excellent activity towards the synthesis of 2,4,5-triphenyl-1(H)-imidazoles and 1-benzyl-2,4,5-triphenyl-1H-imidazoles through MCRs in high yield within shorter reaction time and with low catalyst loading as compared to the microporous zeolite H-BEA. Solvent-free protocol makes the process environmentally benign and economically viable. The present protocol will serve as green tool and opens a new avenue in the area of environmentally benign synthesis of biologically active drug like molecules.

Biography:

Jignesh Shukla has been engaged in the fundamental research work on solubility of gypsum and properties of solution. His working area is to execute the salt technology and brine management in the field for last 13 years. He has experience in synthesis of fluorescence sensor and beneficiation of clay. He has achieved CSIR-Technology Award for his contribution in execution of the salt technology in the rural area. He has also been engaged in the development of formulation for dust less chalk and its technology and commercialization.

He has been also working in the area of clay composite and its application in the field of percolation of brine. He is having the experience in research, evaluation, teaching and administration both in field and laboratory. 

Abstract:

Statement of the Problem: Gypsum, sparingly soluble salt, co-precipitates with NaCl during common salt manufacture. The impurity of gypsum in common salt detriment the membranes in chlor alkali and soda ash industries. Scale formation of gypsum in equipments and/or generators creates problems like fouling in heat exchangers, pressure drop in fluid handling equipment’s and in unit operations in chemical industries. The purpose of this investigation is to provide the solution on descaling of clogged gypsum and/or to prevent crystallization of gypsum on the surfaces.

Methodology & Theoretical Orientation: Gypsum solubility was modified using ionic liquids viz. hydroxyl alkyl amine acetates (5-15%wt) in presence of NaCl aqueous solutions having very high concentration at 35Ëš C. The physicochemical properties like speed of sound, density, viscosity, conductivity and ion concentrations of the solutions were determined using Anton Paar (model DSA 5000m) (resolution:5× 10^-2 Kg.m^-3 and 0.01 m.s^-1 respectively), by rolling ball Anton Paar AMvn viscometer. Ca²⁺, SO₄^2- and Cl^- concentration were determined using standard Na₂-EDTA titration, BaCl₂ gravimetric precipitation and Mohar’s method respectively. Gypsum solubility is governed by physical parameters, salt concentration and nature of the solvent. Reorientation of water molecules and hydrogen bond network occurs when a salt is incorporated. The ionic liquid additives can reinforce this reorientation. The compressibility (Ks) of solutions were derived using Newton-Laplace equation. Jones-Dole equation was used for determination of viscosity coefficient B and D η_r = η/η₀ = 1+Bc+Dc².

Findings: An increment of 28.3% in the solubility of the gypsum at 2.604 m salt concentration was observed. Density and viscosity of the solutions increased proportionally with concentration of salt and additives of the solution. Compressibility decreased as the concentration of salt and gypsum increased.

Conclusion & Significance: Ionic liquid additives act as hydrogen bonding breaker which modified the solubility of gypsum.

Biography:

Juggnu Bhatt has expertise in clay based materials particularly for wastewater treatment and as rheology modifier in various organic media; surface science, salt manufacture, soil science and powder rheology. His has been invited for chapters in two books exhibit the investigation of the treatment of effluents from industries such as textile, textile dyeing and printing, dyes and dye-intermediates, fertilizer, pharmaceutical, petrochemical and agro-based pesticide to his credit. He has developed an organoclay from bentonite for grease for IOC, PP/Nanocomposite for Reliance industry and attapulgite for drilling mud, pharmaceutical and bleaching of cotton seed oil. He has been a member of Editorial Board of the journals Polluton Research, Jr. of Industrial Pollution Control and Ecology Environment and Conservation. He has been a Member of panel of Adjudicators for the PhD degree of Kerala University. He has initiated a work on waste utilization for soil of salt works – a new area/field viz. percolation (ongoing work).

Abstract:

Statement of the problem: The commercial organosmectites manufactured by patented methodology are used as rheology modifier/thixotropic agent in industry manufacturing paints, inks, varnishes, coatings, adhesives, greases, cosmetics and medicines. The organosmectites synthesized using clays and organic modifiers and/or methodologies different/other than the one patented cannot match requisite rheological properties and parameters of the end use. In the present investigation, the attempts have been made to explore the means/approach that can achieve the requisite rheology of the end applications using the non-commercial organosmectites.

Methodology & Theoretical Orientation: Cetrimonium-, 1-Hexadecylpyridinium- and Benzyldimethyloctadecylazanium-smectites derived from Indian (Rajasthan) smectite, and quaternary ammonium salts viz. Cetrimonium bromide, 1-Hexadecylpyridinium chloride and Benzyldimethyloctadecylazanium chloride were studied for rheological properties and parameters of their methylbenzene-dispersions. The effect of concentration of smectite and polar activator has been studied. A commercial organobentoniteBentontie-34 was for comparison.

Findings: The organic density, of quaternary ammonium salts influenced the basal spacing, particle size and bulk density of the organosmectites. Rheological reinforcement of methylbenzene-organosmectite-dispersions prepared using sheering technique demonstrated shear-thinning flow behavior, degree of shear-thinning, stability of the gel structures and yield stress. The potential of organosmectites exhibited the order: Bentone-34 >Benzyldimethyloctadecylazanium-smectite >1-Hexadecylpyridinium-smectite > Cetrimonium-smectite. Whereas the efficiency of the organosmectites to improve the rheology of the methylbenzene-organosmectite-dispersions demonstrated the sequence as follows: 1-Hexadecylpyridinium-smectite > Cetrimonium-smectite > Bentone-34 > Benzyldimethyloctadecylazanium-smectite. The organosmectites with polar activator having smectite based 65 wt.% concentration exhibited optimum rheological enhancement. Ostwald–de Waele relationship and Casson models/equations have been used to describe the rheological properties of methylbenzene-organosmectite-dispersions and respective rheological parameters have also shown the trend same as indicated by the rheological properties.

Conclusion & Significance: So far as conventional sheer method is concerned Bentone-34 is observed to be the most efficient clay in enhancing the rheology of methylbenzene-dispersions, but when ulrtasonication used for preparing the methylbenzene-dispersions the rheology enhancement by 1-Hexadecylpyridinium- and Cetrimonium-smectites are superior to Bentone-34.

Biography:

R S Shinde is working as an Assistant Professor at Dayanand Science College, Department of Chemistry. He completed his PhD from Swami Ramanand Teerth Marathwada University. He has many publications in reputed national and international journals.His major areas of interests are medicinal chemistry, synthetic methodologies, multicomponent reactions etc.

Abstract:

A series of s-triazine based chalcones have been prepared by the Claisen-Schmidt condensation. Chalcones have characteristic 1, 3-diaryl-2-propen-1-one backbone skeleton. Changes in their aryl rings provide accessibility of a high degree of variety that has proven useful for the development of new medicinal agents with improved potency and lesser toxicity. A convenient method for the synthesis of biologically active triazine based chalcones using triazine ketone and substituted benzaldehyde in dry methanol has been done. The structures of the compounds were confirmed by spectral data (IR, ¹H NMR and mass spectroscopy). The synthesized compounds were studied for their antioxidant and anti-diabetic activity. 

Biography:

Warjeet S Laitonjam joined the Department of Chemistry, Manipur University, Manipur, India as Assistant Professor in the year 1988. He is serving as Professor of the Department of Chemistry, Manipur University since 2006. He was a Commonwealth Fellow of Association of Commonwealth Universities, London, UK for one year (1997-1998). He was also nominated as a Visiting Scientist by the Royal Society, London to visit UK for three months (from 31^st January to 5th May 2006). His research area of specialization is Synthetic Organic Chemistry and Natural Products Chemistry. He has shaped 15 PhD students and published more than 70 research papers.

Abstract:

Hexamethylenetetramine-based and DABCO-based ionic liquids were synthesized. These readily available DABCO-based and Hexamethylenetetramine-based ionic liquids behave as recyclable catalysts for various organic reactions, such as, the Michael reaction, the Knoevenagel condensation, Henry reactions, aldol reactions, etc. It will be demonstrated that the DABCO-based ionic liquids behave as recyclable catalysts for the Michael addition reaction of a broad range of active methylene compounds, and α, β-unsaturated carboxylic esters and nitriles, offering excellent yields in short duration. The Knoevenagel condensation of various aromatic/aliphatic/heterocyclic aldehydes and ketones with active methylene compounds using DABCO-based and Hexamethylenetetramine-based ionic liquids afforded the condensation products in excellent yields in short durations. The use of DABCO-based ionic liquid, 1-butyl-4-aza-1-azadiabicyclo [2.2.2] octane hydroxide, as an efficient catalyst for Henry reaction of various carbonyl compounds with nitroalkanes affording very high yields within short duration will also be highlighted. These ILs can also be used as green catalysts for aldol reactions of various aromatic aldehydes and ketones under solvent free conditions at room temperature; and very high to excellent yield can be obtained. They also can be used as catalysts for synthesizing fused pyrimidine derivatives, such as, 7-thioxo-pyrazolopyrano-pyrimidinones, 2-thioxo-benzochromeno-pyrimidinones, etc. These methods are very simple, clean and avoid hazardous organic solvents. The catalysts could be easily recovered and recycled for several times. Thus, development of a series of ionic liquids which could be easily prepared and used as recyclable catalysts for various organic reactions will be highlighted. The process developed is an improved process which offers several advantages over other processes and would contribute to environmentally friendly and safer processes.

Biography:

Yehya Kamal Al-Bayati is associated with Baghdad University, Iraq. He has number of publication in national and international journal.

Abstract:

Two molecularly imprinted polymers (MIPs) were prepared by using ibuprofen as the template a well as methacrylic acid (MAA) or acrylamide (ACY) as monomer, used ethylene glycol dimethacrylate (EGDMA) or trimethylol propane triacrylate (TMPTA) as cross linker, and benzoyl peroxide as initiator. NIPs prepared by using the same composition of MIPs except the template (IBP). The membrane of MIPs, NIPs were prepared by using di butyl phthalate (DBPH), oleic acid (OA), paraffin (PRF) and o-nitro phenyloctylether (ONPOE) as plasticizers in PVC matrix. The  slope, detection limit, linearity range  of electrodes MIPs from (-54.25, -45.23) mV/decade, (1.09×10-6 M-9×10-6 M) and (1×10-5-1×10-1) , respectively, and show stable response in a pH rang from (3.5-7.5) and studied the selectivity with inorganic ions (Na⁺, Li⁺, Ca2⁺, Mg²⁺, Fe³⁺ and  Al³⁺ ) show good selectivity .