Sahar Razavi Zadeh - Department of Chemical Engineering , Islamic Azad University , Quchan Branch,Quchan , Iran
Ehsan Alizadeh
Alireza Afrasiabi

The operation of isolating salt from crude oil is called desalination Because of water and salt with petroleum cause to damage in same oil devices and also causes to decrease petroleum quality andquantity, so the desalination operation is necessary. The desalination accompanies some principleswhich can be referred some cases such as pressure balance, isolating free water from petroleum, adding same chemical materials to separate the isolated water particles, heat, to performpreliminary process of water supply from petroleum and adding fresh water to petroleum .Thepurpose of desalination is elimination and decoration. Same salt with petroleum to acceptable about8-10 pounds per barrel that has same advantages such as decreasing the equipment's erosion ,decreasing chemical ,obstruction protection in catalysts action , improving crude oil quality , usingthe maximum pipes volume and preventing the lavish ant of the used energy in refinery .The desalination is performed in following different methods: sedimentation connection, chemical connection, thermal connection , mechanical connection , electrical connection Or combination of two or more about ways

desalination, crude oil, emulsion, connection methods, Isolation operation