fractional distillation Flashcards
1
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Fractional Distillation
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2
Q
Crude oil is a mixture of hydrocarbons and is not useful as such. It needs to be seperated into different
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3
Q
fractions of alkanes of different chain lengths in a process called fractional distillation.
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4
Q
Method
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5
Q
O Crude oil is heated to 350°C
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6
Q
® Most of the alkanes evaporate
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7
Q
® The different alkane vapours rise up the distillation column. (any liquids
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the longest chains
8
Q
to the bottom.
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9
Q
© When the a get fraction co alon below its boiling point
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it conderes back into a liquid and
10
Q
• the maud ones (e g methane) stay as goes and leave the column at the very top.
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