using halogen acids or oxyacids of halogen (acids generating halogen C10G27/02)

Full Title

Refining of hydrocarbon oils in the absence of hydrogen, with acids, acid-forming compounds or acid-containing liquids, e.g. acid sludge > with acids or acid-containing liquids, e.g. acid sludge > Liquid-liquid treatment forming two immiscible phases > using halogen acids or oxyacids of halogen (acids generating halogen C10G27/02)