investigation of oil-in-water emulsions treatment by crude

investigation of oil-in-water emulsions treatment by crude
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  • How is water separated from crude oil emulsion?
  • The overall procedure of separation of water (brine) from crude oil is generally known as desalting. The size of water droplets in the water-in-oil crude oil emulsions may vary from 0.1 to 100 μm [2, 3, 4, 5]. The ease of separation of water and oil in the emulsion depends on the stability of the emulsion.
  • How is crude oil emulsion stabilized?
  • Crude oil emulsions are further stabilized by asphaltenes, resins wax, clay and other solids present in crude oil. The compounds in crude oil form rigid films at the water and oil droplets phases to prevent them from aggregating and coalescing.
  • Why do crude oil refineries remove water from emulsion?
  • The salts present in the crude oil create severe problems in the downstream processing in refineries such as deactivation or poisoning of the catalyst. Therefore, the removal of water from the emulsion is typically the first unit operation in a crude oil refinery.
  • How much water is in crude oil emulsions?
  • Before downstream refining, water is often added to crude oil for desalination, resulting in the formation of W/O emulsions. These emulsions are then demulsified into two phases . There is about 30~50 wt% oil, 10~12 wt% solids, and 30~50 wt% water in these emulsions .