Patent ID: 6030523
Filing Date: 2000-02-29
Classification: C10G

Abstract:
A process for decreasing the acidity and calcium content of an acidic, calcium-containing non-acid pretreated starting acidic crude oil, comprising:(a) contacting an acidic, calcium containing non-acid pretreated crude with an effective wherein the ratio of starting acidic crude to aqueous base solution is amount of aqueous base at least 1:3 to 1:15 based on the weight of acidic crude to weight of aqueous base solution at conditions of pH and temperature sufficient to forming an unstable emulsion of the non-acid treated starting acidic, calcium containing crude oil in an aqueous base solution;(b) breaking the unstable oil in aqueous base emulsion to produce a first phase containing treated crude oil having a decreased acidity and calcium content, a second aqueous phase containing residual base and neutralized acids, and a third intermediate phase containing an insoluble calcium containing compounds.