Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1999-09-21
2000-12-12
Savage, Matthew O.
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210767, 210634, 208251R, 252312, C02F 142
Patent
active
061593745
ABSTRACT:
A method for removing corrosive inorganic cations--such as calcium magnesium cations--from a crude oil stream by mixing the stream with a softened brine wash water that has been softened by removal or replacement of precipitating divalent or trivalent cations with non-precipitating cations. The crude oil stream and the wash water are mixed at a temperature from about 98.degree. C. to about 150.degree. C. to form an emulsion wherein the corrosive inorganic cations are transferred from the crude oil to the wash water, The emulsion is then broken to form a crude oil fraction and an aqueous fraction containing at least a portion of the corrosive inorganic cations from the crude oil. This method is particularly useful in areas where freshwater is not readily available.
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BetzDearborn Inc.
Boyd Steven D.
Cecil Terry K.
Savage Matthew O.
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