What is the first-cut oil?
1 Answers
First-cut oil refers to the oil produced by the crude oil vacuum distillation tower. The introduction of first-cut oil is as follows: 1. Introduction to first-cut oil: It is mainly divided into first-cut to fourth-cut according to different boiling points, with the boiling point increasing progressively. Among them, first-cut oil is the basic raw material for producing lubricating oil, and the first-cut oil is of better quality and can also be used for blending diesel. Compared with ordinary base oil, first-cut oil is a non-standard oil. Through processes such as solvent deasphalting, solvent dewaxing, solvent refining, hydrofining or acid-base refining, and clay refining, substances that form free carbon, low viscosity index substances, substances with poor oxidation stability, paraffin, and chemical substances that affect the color of finished oil are removed or reduced to obtain qualified lubricating base oil. 2. The main indicators of first-cut oil: density, freezing point, color, viscosity, flash point, etc.