scholarly journals Inexpensive ionic liquids: [HSO4]−-based solvent production at bulk scale

2014 ◽  
Vol 16 (6) ◽  
pp. 3098-3106 ◽  
Author(s):  
Long Chen ◽  
Mahdi Sharifzadeh ◽  
Niall Mac Dowell ◽  
Tom Welton ◽  
Nilay Shah ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Environmental Impact ◽  
Organic Solvents ◽  
Raw Materials ◽  
Solvent Production ◽  
Bulk Scale

ILs manufactured from inexpensive raw materials in few steps are cheaper than some organic solvents and have a low environmental impact.

scholarly journals Electrospun Silk-Cellulose Composite Nanomaterials Using Ionic Liquid Regenerated Films

Proceedings ◽  
2020 ◽  
Vol 69 (1) ◽  
pp. 31
Author(s):  
Ashley Rivera-Galletti ◽  
Ye Xue ◽  
Stacy Love ◽  
David Salas de la Cruz ◽  
Xiao Hu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Raw Materials ◽  
Composite Films ◽  
Structural Defects ◽  
Composite Nanomaterials ◽  
Cellulose Derivatives ◽  
Cellulose Content ◽  
Cellulose Nanomaterials

Electrospinning is a widely used technique to draw recalcitrant biopolymer solutions into micro to nanoscale materials in a simple and economical way. The first focus of this research involved using ionic liquids as a non-volatile solvent for natural insoluble biopolymers such as silk and cellulose (or cellulose derivatives). Compared to traditional organic solvents, ionic liquids can dissolve biopolymers without altering the molecular weight of the biopolymer. In this study, 1-ethyl-3-methylimidizolium acetate (EMIMAc) ionic liquid was used and the regenerated films were coagulated in baths of EtOH or water. The second focus of this research explored the dissolution of IL-regenerated composites into organic solvents and their electrospun composite nanomaterials. Various ratios of silk-cellulose bio-composite films regenerated from ionic liquids were used as the raw materials and sequentially dissolved/dispersed into a Formic Acid-CaCl2 solution in order to initiate the electrospinning of silk-cellulose nanomaterials. Because of the variability of ionic liquids, the nanomaterials produced using this technique have unique and tunable properties such as large surface area to volume ratios and low structural defects. FTIR and SEM results suggest that the structure and morphology of the final nanosized samples becomes more globular when the biopolymer composition ratio has increased cellulose content. TGA results demonstrated that the electrospun materials have better thermal stability than the original films. This two-step electrospinning method, using ionic liquid as a non-volatile solvent to first dissolve and mix raw natural materials, may lead to extensive research into its biomedical and pharmaceutical applications in the future.

scholarly journals Thermal Characterization of Recycled Materials for Building Insulation

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3564
Author(s):  
Arnas Majumder ◽  
Laura Canale ◽  
Costantino Carlo Mastino ◽  
Antonio Pacitto ◽  
Andrea Frattolillo ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Environmental Sustainability ◽  
Building Materials ◽  
Raw Materials ◽  
Natural Fibers ◽  
Thermal Characterization ◽  
Recycled Materials ◽  
Building Insulation ◽  
Operational Phase

The building sector is known to have a significant environmental impact, considering that it is the largest contributor to global greenhouse gas emissions of around 36% and is also responsible for about 40% of global energy consumption. Of this, about 50% takes place during the building operational phase, while around 10–20% is consumed in materials manufacturing, transport and building construction, maintenance, and demolition. Increasing the necessity of reducing the environmental impact of buildings has led to enhancing not only the thermal performances of building materials, but also the environmental sustainability of their production chains and waste prevention. As a consequence, novel thermo-insulating building materials or products have been developed by using both locally produced natural and waste/recycled materials that are able to provide good thermal performances while also having a lower environmental impact. In this context, the aim of this work is to provide a detailed analysis for the thermal characterization of recycled materials for building insulation. To this end, the thermal behavior of different materials representing industrial residual or wastes collected or recycled using Sardinian zero-km locally available raw materials was investigated, namely: (1) plasters with recycled materials; (2) plasters with natural fibers; and (3) building insulation materials with natural fibers. Results indicate that the investigated materials were able to improve not only the energy performances but also the environmental comfort in both new and in existing buildings. In particular, plasters and mortars with recycled materials and with natural fibers showed, respectively, values of thermal conductivity (at 20 °C) lower than 0.475 and 0.272 W/(m⋅K), while that of building materials with natural fibers was always lower than 0.162 W/(m⋅K) with lower values for compounds with recycled materials (0.107 W/(m⋅K)). Further developments are underway to analyze the mechanical properties of these materials.

scholarly journals Nitrile Synthesis with Aldoxime Dehydratases: A Biocatalytic Platform with Applications in Asymmetric Synthesis, Bulk Chemicals, and Biorefineries

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4466
Author(s):  
Pablo Domínguez de María
Keyword(s):  
Asymmetric Synthesis ◽  
Organic Solvents ◽  
Raw Materials ◽  
Aqueous Media ◽  
Industrial Processes ◽  
Polymer Chemistry ◽  
Fine Chemicals ◽  
Mild Conditions ◽  
Bulk Chemicals ◽  
Recent Developments

Nitriles comprise a broad group of chemicals that are currently being industrially produced and used in fine chemicals and pharmaceuticals, as well as in bulk applications, polymer chemistry, solvents, etc. Aldoxime dehydratases catalyze the cyanide-free synthesis of nitriles starting from aldoximes under mild conditions, holding potential to become sustainable alternatives for industrial processes. Different aldoxime dehydratases accept a broad range of aldoximes with impressive high substrate loadings of up to >1 Kg L−1 and can efficiently catalyze the reaction in aqueous media as well as in non-aqueous systems, such as organic solvents and solvent-free (neat substrates). This paper provides an overview of the recent developments in this field with emphasis on strategies that may be of relevance for industry and sustainability. When possible, potential links to biorefineries and to the use of biogenic raw materials are discussed.

Electrogenerated NHCs in Organic Synthesis: Ionic Liquids vs Organic Solvents Effects

2021 ◽  
Author(s):  
Fabrizio Vetica ◽  
Martina Bortolami ◽  
Rita Petrucci ◽  
Daniele Rocco ◽  
Marta Feroci
Keyword(s):  
Ionic Liquids ◽  
Organic Synthesis ◽  
Organic Solvents

Environmental Impact of Ionic Liquids: Automated Evaluation of the Chemical Oxygen Demand of Photochemically Degraded Compounds

ChemPhysChem ◽  
2017 ◽  
Vol 18 (10) ◽  
pp. 1351-1357 ◽  
Author(s):  
Susana P. F. Costa ◽  
Sarah A. P. Pereira ◽  
Paula C. A. G. Pinto ◽  
André R. T. S. Araujo ◽  
Marieta L. C. Passos ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Environmental Impact ◽  
Chemical Oxygen Demand ◽  
Oxygen Demand ◽  
Automated Evaluation

Prediction and correlation of viscosity of binary mixtures of ionic liquids with organic solvents

2014 ◽  
Vol 197 ◽  
pp. 1-6 ◽  
Author(s):  
Divna M. Bajić ◽  
Slobodan P. Šerbanović ◽  
Emila M. Živković ◽  
Jovan Jovanović ◽  
Mirjana Lj. Kijevčanin
Keyword(s):  
Ionic Liquids ◽  
Binary Mixtures ◽  
Organic Solvents

Use of Sugarcane Bagasse Ashes as Raw Material in the Replacement of Fluxes for Applications on Porcelain Tile

2016 ◽  
Vol 881 ◽  
pp. 383-386 ◽  
Author(s):  
Raimundo J.S. Paranhos ◽  
Wilson Acchar ◽  
Vamberto Monteiro Silva
Keyword(s):  
Mechanical Properties ◽  
Environmental Impact ◽  
Physical Properties ◽  
Sugarcane Bagasse ◽  
Sintering Temperature ◽  
Raw Materials ◽  
Raw Material ◽  
The Cost ◽  
Potential Use ◽  
Porcelain Tile

This study evaluated the potential use of Sugarcane Bagasse Ashes (SBA) as a flux, replacing phyllite for the production of enamelled porcelain tile. The raw materials of the standard mass components and the SBA residue were characterized by testing by XRF, XRD, AG, DTA and TGA. Test samples were fabricated, assembled in lots of 3 units and sintered at temperatures of 1150 ° C to 1210 ° C. The results of the physical properties, mechanical properties and SEM of the sintered samples, showed that the formulation, G4 - in which applied 10% of SBA replacing phyllite, sintering temperature 1210 ° C showed better performance as the previously mentioned properties due to the formation of mullite crystals, meeting the prerequisites of standards for enamelled porcelain tile, while reducing the environmental impact and the cost of production.

Phase behavior of mixtures of ionic liquids and organic solvents

2010 ◽  
Vol 55 (2) ◽  
pp. 833-845 ◽  
Author(s):  
Jens Abildskov ◽  
Martin D. Ellegaard ◽  
John P. O’Connell
Keyword(s):  
Ionic Liquids ◽  
Phase Behavior ◽  
Organic Solvents

Ionic liquids or eutectic solvents? Identifying the best solvents for the extraction of astaxanthin and β-carotene from Phaffia rhodozyma yeast and preparation of biodegradable films

2021 ◽  
Author(s):  
Cassamo Mussagy ◽  
Valéria Ebinuma-Santos ◽  
Rondinelli Herculano ◽  
Joao A. P. Coutinho ◽  
Jorge F B Pereira ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Organic Solvents ◽  
Phaffia Rhodozyma ◽  
Biodegradable Films ◽  
Β Carotene

In order to replace conventional organic solvents by more benign equivalents such as ionic liquids or eutetic solvents, in this work we attempt to develop a simple and ecofriendly process...

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