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level: fractional distillation of crude oil

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level questions: fractional distillation of crude oil

QuestionAnswer
describe the stages of fractional distillation of crude oil- crude oil is heated to a very high temp so it boils and all hydrocarbons evaporate and turn into a gas - crude oil vapour is fed into the fractional distillation column which is hotter at the bottom (350) and cooler at the top (25) - hydrocarbon vapours rise up the column + condense when they reach their boiling point - liquid fractions are removed and remaining hydrocarbons continue to rise up the column until they reach their boiling point and condense
where are long chain hydrocarbons removed and whyat the bottom as they have very high boiling points
where are short chain hydrocarbons removed and whyat the top as gases as they have very low boiling points and do not condense
can can some fractions be used forfuels and feedstock
what is a feedstocka chemical used to make other chemicals
give examples of fuels that can be madepetrol, diesel, kerosene, heavy fuel oil, liquified petroleum gas
give examples of feedstock that can be madesolvants, lubricants, detergents, polymers
what is the temp around at the top of the column25 degrees celsius
what is the temp around at the bottom of the column350 degrees celsius