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Extraction method and system for monitoring the presence of phosphate esters in jet fuel

A technology of jet fuel and phosphate ester, which can be used in analysis materials, measuring devices, material separation, etc., and can solve problems such as insufficient meeting detection requirements.

Active Publication Date: 2015-11-25
THE BOEING CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For jet engines manufactured using cobalt-containing metals, this concentration level is insufficient to meet the detection requirement of less than one (1) ppm

Method used

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  • Extraction method and system for monitoring the presence of phosphate esters in jet fuel
  • Extraction method and system for monitoring the presence of phosphate esters in jet fuel
  • Extraction method and system for monitoring the presence of phosphate esters in jet fuel

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Experimental program
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Embodiment

[0052] First, calibration standard concentrations were prepared with known clean jet fuel in a laboratory setting, and then analyzed using laboratory-coupled gas chromatography and mass spectrometry equipment to determine the actual concentration levels of phosphate esters.

[0053] materials needed. Materials required to prepare calibration standards include clean jet fuel, petroleum ether (PET), acetonitrile (ACN), 50ml (milliliter) PET square bottle, 100ml glass bottle for standard preparation, accurate to 4 decimal places Balance, disposable pipette, two 25ml graduated cylinders, volumetric pipettes of 3ml, 15ml and 25ml, 2ml gas chromatography (GC) bottle. All calibration standards were prepared using known clean jet fuel and weighed in 100ml glass bottles. Accurate concentration values ​​are obtained after weighing.

[0054] Calibrate the extraction process of standards and samples.Pour 25ml of clean jet fuel into a 50ml PET square bottle. 15ml of PET was added via...

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Abstract

There is provided a method of monitoring for the presence of phosphate esters in jet fuel. The method comprises obtaining from a jet fuel source a jet fuel test sample suspected of containing phosphate esters. The method further comprises combining the jet fuel test sample with a polar solvent and a nonpolar solvent to form a mixture. The method further comprises agitating the mixture. The method further comprises extracting the polar solvent from the mixture. The method further comprises performing a combined gas chromatography and mass spectrometer analysis of the polar solvent to monitor for the presence of any phosphate esters and to obtain an actual concentration level of any phosphate esters. The method further comprises comparing the actual concentration level of any phosphate esters with a calibration standard concentration of phosphate esters in clean jet fuel.

Description

technical field [0001] The present disclosure relates generally to methods and systems for monitoring the presence of compounds in fuel, and more particularly, to methods and systems for monitoring the presence of organophosphorus compounds in jet fuel. Background technique [0002] Cobalt-containing metals and alloys can be used to manufacture aircraft jet engines. Because they withstand high temperatures and are resistant to oxidation and corrosion, the metals and alloys allow aircraft jet engines to operate more efficiently. However, when such cobalt-containing metals react with organophosphorous compounds such as phosphates, they are susceptible to corrosion. [0003] Among aviation hydraulic fluids used in aircraft hydraulic systems, phosphate esters are the most commonly used base materials, among which tributyl phosphate, isopropylated triphenyl phosphate, n-butyl diphenyl phosphate and di-n- Butylphenyl ester is a widely used ingredient. Typically, phosphate ester...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/28
CPCG01N33/2835G01N30/7206Y10T436/163333Y10T436/20Y10T436/24Y10T436/25375Y10T436/255G01N30/00G01N30/72G01N33/22G01N33/28
Inventor G·J·沃纳G·R·塔曼斯
Owner THE BOEING CO
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