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Microwave optimal operation

Microwave-Assisted Drying Process Control and Optimal Operation... [Pg.338]

Microwave heating is often applied to already known conventional thermal reactions in order to accelerate the reaction and therefore to reduce the overall process time. When developing completely new reactions, the initial experiments should preferably be performed only on a small scale applying moderately enhanced temperatures to avoid exceeding the operational limits of the instrument (temperature, pressure). Thus, single-mode reactors are highly applicable for method development and reaction optimization. [Pg.92]

Expeditious preparation of N-sulfonylimines has been optimized for one-pot solventless operation that involves microwave thermolysis of aldehydes and sulfonamides in presence of relatively benign reagents, calcium carbonate and montmoril-lonite K 10 clay (Scheme 6.23) [76],... [Pg.193]

Dedicated microwave reactors have been developed that are capable of reliable and safe operation with volatile organic solvents at elevated temperatures andpressures13,65,91-95. Independent investigations into optimal parameters for microwave chemistry support this approach90,96. [Pg.249]

In this introductory book chapter, several modem extraction techniques will be described, including supercritical fluid extraction, pressurized liquid extraction, pressurized hot Avater extraction, microwave assisted extraction, membrane-assisted solvent extraction, solid phase micro extraction and stir-bar sorptive extraction. These are techniques that meet many of today s requirements in terms of environmental sustainability, speed and automation. Basic principles of operation as well as method optimization will be discussed and compared for the different techniques. Both analytical and industrial applications will be discussed, together with commercial instruments available on the market. Key references will be given, and conclusions regarding applicability of the different techniques with respect to sample e, target-molecules and analytical vs. large-scale applications. [Pg.10]

The importance of these phenomena caimot be overemphasized, because they have significant effects on the yields and the quality of the products. The characteristics and limitations of these systems which affect the reactor performance should be well understood to ensure successful design and operation of the plant. Consequently, a microwave plant could be optimized for several given compositions (i.e. dielectric properties and thermal dependency). An optimized microwave plant cannot be a versatile device in terms of dielectric properties or, in other words, chemical composition. [Pg.44]


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See also in sourсe #XX -- [ Pg.308 , Pg.309 ]




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