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US 6,288,379 B1Granted
Use of continuously variable power in microwave assisted chemistry
AssigneeCEM Corporation
InventorsGary Roger Greene, David Allan Barclay
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AssigneeCEM Corporation
InventorsGary Roger Greene, David Allan Barclay
Estimating the term…
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 for microwave assisted chemistry is also disclosed and comprises a cavity for receiving a sample, a waveguide connected to the cavity, a source of microwave radiation connected to the waveguide, and a switching power supply for driving the source of microwave radiation.
A method of microwave assisted chemistry in which power is supplied in a manner that improves the control and moderation of a chemical reaction, the method comprising:
A method of microwave assisted chemistry in which power is supplied in a manner that improves the control and moderation of a chemical reaction, the method comprising:
A method of microwave assisted chemistry comprising driving a magnetron with a variable power supply at a first predetermined power level, directing the microwaves from the magnetron to a sample, measuring a characteristic of the sample while the sample is being exposed to the microwaves, and moderating the output of the variable power supply based upon the measured characteristic, the moderation comprising moderating both the duty cycle and the applied microwave power and applying power at a second predetermined power level that is sufficient to maintain the sample at a set point using the moderated duty cycle.
A method of microwave assisted chemistry comprising driving a magnetron with a resonant inverter at a first predetermined power level, directing the microwaves from the magnetron to a sample, measuring a characteristic of the sample while the sample is being exposed to the microwaves, and moderating the output of the resonant inverter based upon the measured characteristic, the moderation comprising moderating both the duty cycle and the applied microwave power and applying power at a second predetermined power level that is sufficient to maintain the sample at a set point using the moderated duty cycle.
A method of microwave assisted chemistry in which power is supplied in a manner that improves the control and moderation of a chemical reaction, the method comprising:
Dependencies are inferred from the claim text.