Method for determination of system parameters for reducing crude unit corrosion
First Claim
1. A method of measuring at least one property of a predominantly liquid sample, the method comprising the steps of:
- positioning the sample within an apparatus, the apparatus comprising a boron doped diamond (BDD) cell, a chamber, and at least one reagent source constructed and arranged to feed at least one chemical reagent into the chamber,pre-conditioning the sample by performing one or more pre-conditioning steps which include passing the sample through the BDD cell thereby oxidizing sulfoxy compounds within the sample via the BDD cell,after pre-conditioning, adding the at least one chemical reagent to the sample in the chamber, the at least one chemical reagent capable of inducing a measurable optical effect when added to the sample that is directly related to the at least one property,mixing the at least one chemical reagent with the sample in the chamber to form a mixture,moving the mixture past an optical sensor,measuring at least two optical properties of the mixture to determine a measured optical effect of the sample, anddeducing the value of the at least one property by comparing the measured optical effect to predetermined values associated with the at least one property,wherein the measured optical effect is independent of the volume of the sample and independent of the volume of the at least one chemical reagent added to the sample.
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Accused Products
Abstract
The invention provides a method and apparatus for determining the amount of various materials in a liquid sample. Because the apparatus is particularly resilient it can be used repeatedly with very harsh liquid samples such as boot water from an oil refinery. The apparatus uses at least one volume and/or concentration independent optical analysis method to determine at least one of: the pH, amount of chloride, and/or amount of iron in the sample. The optical property can be colorimetric, fluorescent or both and result from adding dyes, complexing agents, turbidity inducing compounds, and other optically effecting reagents to the sample. Because the measurements are concentration and volume independent they can be done continuously, quickly, and avoid the inconvenient start and stop procedures in prior art measurement regimens. The method further includes using a BDD cell to oxidize materials (such as sulfoxy compounds) that would otherwise interfere with the optical analysis and/or to sparge the sample with gas.
19 Citations
18 Claims
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1. A method of measuring at least one property of a predominantly liquid sample, the method comprising the steps of:
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positioning the sample within an apparatus, the apparatus comprising a boron doped diamond (BDD) cell, a chamber, and at least one reagent source constructed and arranged to feed at least one chemical reagent into the chamber, pre-conditioning the sample by performing one or more pre-conditioning steps which include passing the sample through the BDD cell thereby oxidizing sulfoxy compounds within the sample via the BDD cell, after pre-conditioning, adding the at least one chemical reagent to the sample in the chamber, the at least one chemical reagent capable of inducing a measurable optical effect when added to the sample that is directly related to the at least one property, mixing the at least one chemical reagent with the sample in the chamber to form a mixture, moving the mixture past an optical sensor, measuring at least two optical properties of the mixture to determine a measured optical effect of the sample, and deducing the value of the at least one property by comparing the measured optical effect to predetermined values associated with the at least one property, wherein the measured optical effect is independent of the volume of the sample and independent of the volume of the at least one chemical reagent added to the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification