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https://digitalcommons.mtech.edu/patents_mtech
Recent documents in Montana Tech Patentsen-usTue, 09 Mar 2021 12:57:23 PST3600Apparatus and Method for Removing Mercury Vapor from a Gas Stream
https://digitalcommons.mtech.edu/patents_mtech/7
https://digitalcommons.mtech.edu/patents_mtech/7Mon, 22 Dec 2014 10:02:44 PST
A metallic filter effectively removes vapor from gas streams. The filter captures the mercury which then can be released and collected as a product. The metallic filter is a copper mesh sponge plated with a six micrometer thickness of gold. The filter removes up to 90% of mercury vapor from a mercury contaminated gas stream.
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Kumar GanesanMethod of Detecting System Function by Measuring Frequency Response
https://digitalcommons.mtech.edu/patents_mtech/6
https://digitalcommons.mtech.edu/patents_mtech/6Mon, 22 Dec 2014 10:02:43 PST
Real time battery impedance spectrum is acquired using one time record, Compensated Synchronous Detection (CSD). This parallel method enables battery diagnostics. The excitation current to a test battery is a sum of equal amplitude sin waves of a few frequencies spread over range of interest. The time profile of this signal has duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known, synchronous detection processes the time record and each component, both magnitude and phase, is obtained. For compensation, the components, except the one of interest, are reassembled in the time domain. The resulting signal is subtracted from the original signal and the component of interest is synchronously detected. This process is repeated for each component.
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John L. Morrison Ph.D. et al.Method of Detecting System Function by Measuring Frequency Response
https://digitalcommons.mtech.edu/patents_mtech/5
https://digitalcommons.mtech.edu/patents_mtech/5Mon, 22 Dec 2014 10:02:42 PST
Methods of rapidly measuring an impedance spectrum of an energy storage device in-situ over a limited number of logarithmically distributed frequencies are described. An energy storage device is excited with a known input signal, and aresponse is measured to ascertain the impedance spectrum. An excitation signal is a limited time duration sum-of-sines consisting of a select number offrequencies. In one embodiment, magnitude and phase of each frequency ofinterest within the sum-of-sines is identified when the selected frequencies and sample rate are logarithmic integer steps greater than two. This technique requires a measurement with a duration of one period of the lowest frequency. In another embodiment, where selected frequencies are distributed in octave steps, the impedance spectrum can be determined using a captured time record that is reduced to a half-period of the lowest frequency.
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John L. Morrison Ph.D. et al.Method of Detecting System Function by Measuring Frequency Response
https://digitalcommons.mtech.edu/patents_mtech/4
https://digitalcommons.mtech.edu/patents_mtech/4Mon, 22 Dec 2014 10:02:40 PST
Real-time battery impedance spectrum is acquired using a one-time record. Fast Summation Transformation (FST) is a parallel method of acquiring a real-time battery impedance spectrum using a one-time record that enables battery diagnostics. An excitation current to a battery is a sum of equal amplitude sine waves of frequencies that are octave harmonics spread over a range of interest. A sample frequency is also octave and harmonically related to all frequencies in the sum. The time profile of this signal has a duration that is a few periods of the lowest frequency. The voltage response of the battery, average deleted, is the impedance of the battery in the time domain. Since the excitation frequencies are known and octave and harmonically related, a simple algorithm, FST, processes the time record by rectifying relative to the sine and cosine of each frequency. Another algorithm yields real and imaginary components for each frequency.
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John L. Morrison Ph.D. et al.Styrene Based Ion Exchange Resins with Oxine Functionalized Groups
https://digitalcommons.mtech.edu/patents_mtech/3
https://digitalcommons.mtech.edu/patents_mtech/3Mon, 22 Dec 2014 10:02:39 PST
Oxine ligands placed on styrene base ion exchange resins selectively remove iron and gallium from acidic solutions. After loading, the oxine resin is stripped of the loaded metals and used again for further metal removal. The resins can be used for process streams, acid rock drainages, or any other iron or gallium containing solution.
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Paul J. Miranda et al.Method of Estimating Pulse Response Using an Impedance Spectrum
https://digitalcommons.mtech.edu/patents_mtech/2
https://digitalcommons.mtech.edu/patents_mtech/2Mon, 22 Dec 2014 10:02:38 PST
Electrochemical Impedance Spectrum data are used to predict pulse performace of an energy storage device. The impedance spectrum may be obtained in-situ. A simulation waveform includes a pulse wave with a period greater than or equal to the lowest frequency used in the impedance measurement. Fourier series coefficients of the pulse train can be obtained. The number of harmonic constituents in the Fourier series are selected so as to appropriately resolve the response, but the maximum frequency should be less than or equal to the highest frequency used in the impedance measurement. Using a current pulse as an example, the Fourier coefficients of the pulse are multiplied by the impedance spectrum at corresponding frequencies to obtain Fourier coefficients of the voltage response to the desired pulse. The Fourier coefficients of the response are then summed as reassembled to obtain the overall time domain estimate of the voltage using series analysis.
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John L. Morrison Ph.D. et al.Method for Aqueous Gold Thiosulfate Extraction Using Copper-Cyanide Pretreated Carbon Asdortion
https://digitalcommons.mtech.edu/patents_mtech/1
https://digitalcommons.mtech.edu/patents_mtech/1Mon, 22 Dec 2014 09:48:12 PST
A gold thiosulfate leaching process uses carbon to remove gold from the leach liquor. The activated carbon is pretreated with copper cyanide. A copper (on the carbon) to gold (in solution) ration of at least 1.5 optimizes gold recovery from solution. To recover the gold from the carbon, conventional elution technology works but is dependent on the copper to gold ratio on the carbon.
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Courtney Young et al.