Working in a research organisation for 15 years, I have experience of writing technical and science articles, reports and patents. Interested to work with you. Attaching below two paragraphs from an article for your perusal.
"There are many impurities/ contaminants present in the downstream hydrocarbon products like LPG, gasoline, naphtha, kerosene, diesel etc, from petroleum crude processing units. These contaminants appear in hydrocarbon products due to natural source or produce during passing through different processing stages. The impurities like napthenic acid in diesel, hydrogen sulphide, mercaptans and COS in gasoline, LPG, naphtha and kerosene obtained from different units are required to be removed to meet the desired specification which are becoming more and more stringent to meet the environmental statutory regulation.
These hydrocarbons are treated with either caustic or amine solution or by both in a contactor. The contactor should ensures proper contacting of immiscible liquid- liquid system. Such contactors could be packed column, tray column. mixing valve or static mixer. depending on specific application. For example, for removing H2S/ mercaptan from hydrocarbon stream mixing valve is used. In mixing valve, one phase gets dispersed into the other phase as droplets, at the expense of shear energy. In this process ratio of hydrocarbon and caustic. phase is important for maintaining efficiency of the process."