Initial boiling point, final boiling point
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A low initial boiling point of the refined oil indicates an abundance of C5 components in the refined oil at the bottom of the tower; does this mean that the components of the refined oil are relatively light? Can a high final boiling point and an upward shift in the heavier components indicate that the refined oil is too heavy? I hope the experts can give some advice
First, clarify this: in the gas separation process, the components that play a key role in achieving the separation goal and their concentrations are what we refer to as key components; these key components must be two components with similar properties. In a gas separation column, it is always the light components that emerge from the top of the column; the recovery rate of these components is higher at the top than at the bottom. Among all or most of the products that reach the top of the column, the heaviest component is the light key component ； And it is always the heavier components that come out from the bottom of the tower; the recovery rate of these components is higher at the bottom than at the top. Among all and most of the products that reach the bottom of the tower, the lightest component is the heaviest key component.
Take a look at this again: when oil is heated and distilled using an Enneberg distillation apparatus, the first molecules to vaporize and be distilled off are those hydrocarbon molecules with low boiling points. The vapor temperature at which the first drop of condensate is formed is called the initial boiling point. During the distillation process, hydrocarbon molecules evaporate gradually in order of their boiling points, and the temperature of the vapor phase rises accordingly. The highest temperature reached at the end of distillation is known as the final boiling point or dry point.
The initial boiling point can provide some indication, but the final boiling point is largely related to the density of the raw material; PONA from the same period can be used as a reference
A high final boiling point indicates an abundance of heavy components. What does \"moving upward\" mean?