The fully automatic distillation range analyzer is mainly used to determine the distillation characteristics of liquids such as petroleum products, crude oil, and chemical raw materials. By heating the sample to evaporate, the boiling point range and distillation range distribution are measured.
The fully automatic distillation range analyzer is an automated analytical instrument used to accurately determine the distillation range of liquid fuels (such as gasoline, diesel, kerosene, etc.) and other volatile organic liquids. Distillation range refers to the temperature range from the initial boiling point to the final boiling point and the temperature corresponding to each distillation volume when a liquid is distilled under specified conditions. It is an important indicator for measuring the volatility, purity, and performance of a liquid, and is widely used in fields such as petrochemicals, energy, and quality inspection.
The working principle of the fully automatic distillation range analyzer is based on the difference in boiling points of each component in the liquid mixture:
Heating and evaporation: The sample is heated in a distillation flask, and low boiling point components preferentially vaporize to form steam.
Condensation reflux: Steam is cooled through a condenser tube and then re condensed into liquid, which flows back into the measuring cylinder.
Component separation: As the temperature increases, components with different boiling points evaporate sequentially and are collected. By measuring the recovery volume corresponding to each temperature point, a distillation range curve is drawn.
Data recording: The instrument automatically records the initial boiling point, final boiling point, and intermediate fraction temperature.
Precautions for use
Sample pretreatment: The sample needs to be free of mechanical impurities, otherwise it needs to be filtered to avoid clogging the distillation flask or affecting volume measurement; Volatile samples should be sampled at low temperatures to prevent a lower initial boiling point.
Instrument calibration: Regularly calibrate temperature and volume sensors with standard substances (such as n-hexane, toluene) to ensure accurate measurement results.
Condensation system maintenance: Keep the condenser tubes clean and regularly check the circulating water flow and temperature (if the cooling water temperature is too high, it will cause incomplete condensation and result in a smaller distillate volume).
Safe operation: When distilling flammable samples, ensure that the instrument is well grounded to avoid static sparks; After the experiment, wait for the heating device to cool down before processing the sample to prevent burns.