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Zhenhai Refining & Chemical Co., Ltd. – Brief Report on Da Mixed Oil Processing (I), Production Department, October 20, 2006. I. Main physical properties of Da mixed oil: The density of Da mixed oil is 904.5 kg/m3; its freezing point is 38°C. The sulfur content is 0.112%, the nitrogen content is 3390 mg/kg, and the acid value is 2.02 mgKOH/g. Among the metal contents, the levels of nickel and vanadium are 63.02 mg/kg and 1.06 mg/kg respectively. The water content is 5.2%, and the characteristic factor k is 12.3. It belongs to the category of low-sulfur heavy paraffinic crude oil. The yield of the HK～180°C fraction of the mixed crude oil is 4.03%, the yield of the light oil fraction in the 180～350°C range is 14.47%, and the total extraction rate at temperatures below 530°C is 46.17%. Based on comparisons of sulfur content, density, and crude oil properties, the Da mixed crude oil has properties that are relatively similar to those of the Argentine-Escalante crude oil. The general properties of crude oil and its actual boiling point distillation data are detailed in Table 1. Table 1 General properties of crude oil and distillation data at its actual boiling point: API value 24.5; Metal analysis: Femg/kg 68.88; Density at 20°C: kg/m3 904.5; Ni: 63.02; Kinematic viscosity at 50°C: mm2/s 317.4; Cu: 0.32; Sulfur content: W% 0.112; V: 1.06; Nitrogen content: mg/kg 3390; Ca: 5.42; Freezing point: °C 38; Mg: 1.40; Element analysis: CW% 86.90; Pb