Organic chlorides determination in petroleum and petroleum products
There are three methods of organic chlorides determination: method covers the determination of organic chloride in the washed naphtha fraction of crude oil by sodium biphenyl reduction followed by potentiometric filtration; another method – by oxidative combustion followed by microculonometric titration, and thirth method – X-ray fluorescence analysis.
All methods include sampling, naphtha distillation at 204 oC, naphtha washing from hydrogen sulfide and non-organic chlorides.
XRFA method has some advantages:
Internal standard (5000 ppm Bismuth solution in non-polar solvent) is mixed with washed naphtha fraction.
Two sample cups are filled with the mixture, covered with film and measured in a spectrometer.
Mass content of organic chlorides is determined with a preliminary obtained calibration equation.
All methods include sampling, naphtha distillation at 204 oC, naphtha washing from hydrogen sulfide and non-organic chlorides.
XRFA method has some advantages:
- no interfering factors;
- minimal consumables required;
- minimal influence of human factor;
- the time for concurrent samples analysis is about 15 minutes.
Internal standard (5000 ppm Bismuth solution in non-polar solvent) is mixed with washed naphtha fraction.
Two sample cups are filled with the mixture, covered with film and measured in a spectrometer.
Mass content of organic chlorides is determined with a preliminary obtained calibration equation.
