Water based demulsifier formulation and process for its use in dewatering and desalting crude hydrocarbon oils

摘要

Oil is dehydrated and/or desalted by an aqueous formulation comprising (i) a demulsifier preferably an alkylene oxide alkyl phenol-formaldehyde condensate such as a poly ethoxylated nonylphenol-formaldehyde condensate and (ii) a deoiler which is usefully a polyol such as ethylene glycol or poly (ethylene glycol) of Mw ranging from 106 to 4500 the formulation optionally includes a cosolvent such as isopropanol.