Alkylation oil boiling range
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Among the control parameters for alkylated oils in companies, the boiling range is regulated by considering the initial boiling point, the 10% point, the 50% point, and the dry point. What does the initial boiling point mean, and how are the 10% and 50% points controlled? Thank you for your helpful advice; thanks first! ! !
The initial boiling point refers to the temperature (and corresponding vapor pressure) recorded at the moment when the first drop of condensate falls from the end of the condenser during the determination of the oil’s boiling range. This value varies with the season: it is higher in summer and lower in winter. Here, we control the vapor pressure at 50–55 KPa in summer and 60–65 KPa in winter; the principle remains the same. The dry point refers to the temperature at the moment when the last drop of liquid evaporates from the lowest point of the distillation flask during the boiling range test under specified conditions. A high dry point indicates poor quality of the oil with a low octane rating, while a low dry point signifies good oil quality with a high octane rating
My feeling is that, for alkylated oils, apart from the dry point, none of the other parameters can be controlled – is my understanding correct?
The initial distillation point, 10%, 50%, 90%, and the dry point can all be controlled, depending on the quality requirements of the oil you need.
This post was last edited by sdwfsgyykai on 2018-6-23 10:16. The initial boiling point can also be controlled
Alkylated oil, also known as isooctane, is an alkane mixture composed of about 60-75% isooctane. Depending on the manufacturing process used, its boiling range may vary slightly, but not by much. The initial and final boiling points can generally be controlled manually, while the boiling range between 10-90% remains relatively stable
For normal production, the initial boiling point and final boiling point are sufficient; as for other factors, it depends on whether you adjust the oil composition. All of these can be controlled, but when adjusting the oil composition, attention must be paid to both the final boiling point and the dry point
Could you explain in detail how to control it?
I think it should all be controllable – through distillation, reaction temperature, catalyst purity, reaction space velocity, and by controlling impurities in the raw materials. Distillation also helps to control the initial boiling point, which in turn affects the 10% and 90% fractions. Both reaction conditions and raw material purity also influence the quality of the product.