Help translate a sentence: first distillation drop

What does C11–C19 mean? It refers to hydrocarbons with a carbon count of 11 to 19. First distillation drop refers to the pressure drop during the first stage of distillation

Thanks to the person above, but “first distillation drop” – does it not mean pressure drop? Boiling temperature at atmospheric pressure (1,000 meters above sea level). First distillation drop: 180°C; 0 to 30% concentration: 210°C

Please note the original format, and provide the full text from the beginning: first distillation drop. 180 C Temperature of the first drop of distillate -----> Initial boiling point

Then you need to give a sentence so it can be judged~ When used alone, \"drop\" means a decrease; pressure reduction can be expressed as \"pressure drop\", a decrease in concentration as \"concentration drop\", and a decrease in temperature as \"temperature drop\" – that must be the temperature drop you’re referring to

For reference only: “first distillation drop” can be translated literally as “the first drop of liquid obtained during distillation”; in terms of meaning, it refers to the “initial boiling point””

\"Drop\" means \"liquid droplet\" in English, so translating it as \"pressure drop\" is definitely incorrect. I agree with what was said on floor 6; let’s translate it as \"initial boiling point\"!

It is estimated that the original poster is talking about the boiling range of petroleum products. The relevant terms are as follows: Distillation range: This refers to the range of temperatures over which distillation occurs. Initial boiling point: It is the temperature at the moment when the first drop of distillate falls from the end of the condenser during the distillation of a sample under specified conditions; it is commonly referred to as IBP, or initial boiling point, and is also sometimes called the first drop, first distillation drop, or first drop temperature. End boiling point: This is often denoted as EP, or end point; it can also be referred to as the final boiling point. It represents the highest temperature recorded during the distillation process under specified conditions, expressed in °C. There is also the term “dry point”: in the determination of the boiling range of oils under specified conditions, it refers to the temperature recorded at the moment when the last drop of liquid at the bottom of the flask vaporizes, expressed in °C. What the original poster referred to as the \"first distillation drop\" is likely the initial boiling point – 0–30%, 210°C; this refers to the temperature recorded when 30% of the liquid has been distilled off during the distillation test. This post was last edited by niuky on 2009-3-30 at 10:30.]

Petroleum distillate containing C11 to C19: Distilled products of petroleum; includes C11-C19 (which refers to the number of carbon atoms); first distillation drop: the temperature of the first drop of distillate

Please! Could you give the full text next time??

Petroleum distillate containing C11 to C19: Petroleum distillates that contain hydrocarbons with 11 to 19 carbon atoms (C11 refers to hydrocarbons with 11 carbon atoms in their molecule.....)

Petroleum distillate: Oil distillates containing C11 to C19: Compounds with C11–C19 structures. First drop: The first batch of product obtained during extraction. First distillation drop: Literally translated as “the first product obtained from distillation”; it should be understood as the initial distillate”