Phillips 66 has been granted a patent for a system and method to measure the concentration of ammonium bisulfide in a fluid sample. The system includes an electrolytic conductivity cell, a temperature sensor, and an analyzer that uses signals from these components to determine the concentration of ammonium bisulfide. The system also compensates for the effects of pressure and temperature on the conductivity measurement. GlobalData’s report on Phillips 66 gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Phillips 66, Microscale biofuel reactors was a key innovation area identified from patents. Phillips 66's grant share as of September 2023 was 57%. Grant share is based on the ratio of number of grants to total number of patents.

Measuring ammonium bisulfide concentration in a fluid sample

Source: United States Patent and Trademark Office (USPTO). Credit: Phillips 66

A recently granted patent (Publication Number: US11777111B2) describes a system for determining the concentration of ammonium bisulfide in an aqueous liquid stream. The system includes a conductivity cell, a temperature sensor, a pressure sensor, and an analyzer.

The conductivity cell is designed to measure the electrolytic conductivity of the liquid stream as it flows through the cell. The temperature sensor is inserted directly into the liquid stream to measure its temperature, while the pressure sensor measures the pressure of the stream. These signals from the conductivity cell, temperature sensor, and pressure sensor are then received by the analyzer.

The analyzer uses a calibration algorithm to correlate the signals and determine the concentration of ammonium bisulfide in the liquid stream. Importantly, the calibration algorithm is able to compensate for any effects of pressure, temperature, or both on the conductivity measurement. This ensures accurate and reliable results.

In addition to determining the concentration of ammonium bisulfide, the analyzer is also capable of outputting this information to a display. This allows for easy monitoring and tracking of the concentration levels.

The system can be used in various applications, such as in refineries where sour water is present. The temperature sensor and conductivity cell can be placed along the output of sour water at a refinery, ensuring that the liquid stream contains at least part of the sour water. Alternatively, they can be placed along an analyzer loop that is connected to the flow of hydrotreater sour water.

To further enhance the accuracy of the measurements, the system includes a flow meter to measure the flow rate of the liquid stream. The analyzer can receive a signal from the flow meter and indicate an error if the flow rate falls below a threshold value.

Other components of the system include a filter disposed upstream of the conductivity cell to remove any impurities, and a cellular modem or wireless device for transmitting the concentration data to a remote location.

Overall, this patented system provides a reliable and accurate method for determining the concentration of ammonium bisulfide in an aqueous liquid stream, with applications in various industries.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.