USE OF CONTINUOUSLY VARIABLE POWER IN MICROWAVE ASSISTED CHEMISTRY

A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or moderate a chemical reaction. The method comprises measuring the duty cycle required to maintain a measured selected parameter of a sample at...

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Main Authors GREENE, GARY ROGER, BARCLAY, DAVID ALLAN
Format Patent
LanguageEnglish
French
Published 28.10.1999
Edition6
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Abstract A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or moderate a chemical reaction. The method comprises measuring the duty cycle required to maintain a measured selected parameter of a sample at a predetermined set point while the sample is being exposed to microwave radiation at a first predetermined power level; and moderating the duty cycle and the applied microwave power to increase the on time of the duty cycle while applying power at a second predetermined power level that is sufficient to maintain the sample at the set point using the moderated duty cycle. A corresponding device (10) for microwave assisted chemistry is also disclosed and comprises a cavity (11) for receiving a sample (16), a waveguide (12) connected to the cavity (11), a source of microwave radiation connected to the waveguide (12), and a switching power supply (17) for driving the source of microwave radiation (13).
AbstractList A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or moderate a chemical reaction. The method comprises measuring the duty cycle required to maintain a measured selected parameter of a sample at a predetermined set point while the sample is being exposed to microwave radiation at a first predetermined power level; and moderating the duty cycle and the applied microwave power to increase the on time of the duty cycle while applying power at a second predetermined power level that is sufficient to maintain the sample at the set point using the moderated duty cycle. A corresponding device (10) for microwave assisted chemistry is also disclosed and comprises a cavity (11) for receiving a sample (16), a waveguide (12) connected to the cavity (11), a source of microwave radiation connected to the waveguide (12), and a switching power supply (17) for driving the source of microwave radiation (13).
Author BARCLAY, DAVID ALLAN
GREENE, GARY ROGER
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DocumentTitleAlternate UTILISATION D'UNE ENERGIE A VARIATION CONTINUE POUR DES TRAITEMENTS CHIMIQUES ASSISTES PAR HYPERFREQUENCES
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Snippet A method of microwave assisted chemistry is disclosed in which power can be supplied more continuously at preferred power levels to more precisely control or...
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SubjectTerms CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
TESTING
THEIR RELEVANT APPARATUS
TRANSPORTING
Title USE OF CONTINUOUSLY VARIABLE POWER IN MICROWAVE ASSISTED CHEMISTRY
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