By Georgios Stefanidis, Andrzej Stankiewicz, James H Clark, Antonio De La Hoz, Jiajun Fan, Rafael Mato Chain, V Hessel, Jorge Gascon, Tom Van Gerven, Jordan Hristov, Faical Larachi, P Gogate, Kamelia Boodhoo, Juray De Wilde
Using substitute strength kinds and move mechanisms is among the key techniques of technique intensification. in recent times, a great deal of examine were performed in constructing chemical processing applied sciences more desirable via plasma, electrical and magnetic fields, electromagnetic and ultra-sound waves and excessive gravity fields. Discussing the huge impression of other strength move applied sciences on reactions, separations and fabrics synthesis, this ebook studies on contemporary step forward ends up in a number of program parts. It offers a accomplished evaluation of the present advancements within the box. The ebook allows industrialists, teachers and postgraduates in alternative-energy dependent processing to work out the potential for substitute energies for eco-friendly chemistry and sustainability of chemical production
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4 Reactions in Solution The vast majority of reactions in organic synthesis, on both the industrial and laboratory scales, are performed in solution. The use of solvents allows the following: - Obtaining an efficient mixture of reagents at the molecular level. - Placing in contact the reagents at the appropriate concentrations to achieve a suitable reaction rate. - Transporting reagents and/or products and facilitating the dosage for introduction into the reactor. - Controlling the temperature of the reaction.
10–100 times the quantity of reagents, and most of them are volatile (VOC's). Solvents are used not only during the reaction but also in the separation, purification (recrystallization, chromatography) and, possibly, in a final separation (evaporation, distillation, decantation, filtration or centrifugation) to obtain the final product. On the other hand, solvents are the most likely contaminants amongst the auxiliary products because of their volatile and fluid nature. Solvents may have occupational toxicity, ecotoxicity, flammability or carry the risk of explosion and they may have drawbacks such as persistent contamination and pollution.
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