MICROWAVE TECHNIQUE FOR DETERMINING PRECIPITATED MOISTURE IN LIQUID HYDROCARBONS Russian patent published in 2012 - IPC G01N22/04 

FIELD: chemistry.

SUBSTANCE: analysed liquid is placed inside a cylindrical cavity resonator whose longitudinal axis is perpendicular to the horizontal; H₀₁₁ and E₀₁₀ electromagnetic oscillations are successively excited; the Q-factor of the cylindrical cavity resonator with oscillations H₀₁₁ and E₀₁₀ before and after placing the analysed liquid into the resonator is measured and volume concentration of the precipitated moisture is determined from the measurement of the Q-factor of the resonator; the cylindrical cavity resonator is further filled with the analysed liquid; after a time t≥10 s, the liquid is completely removed from the resonator such that residual moisture remains on the bottom end wall and the volume concentration of the precipitated moisture in the range of up to 0.4% is determined from the measurement of the Q-factor of the cylindrical cavity resonator with oscillation E₀₁₀, and in the range 0.4-2% from the measurement of the Q-factor of the cylindrical cavity resonator with oscillation H_011.

EFFECT: high accuracy of determining volume concentration of precipitated moisture in liquid hydrocarbons.

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