July 09, 2020, 12:55:04 AM
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Topic: How to Separate Toluene from Petrol ?  (Read 255 times)

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Offline sprotz

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How to Separate Toluene from Petrol ?
« on: April 26, 2020, 03:59:16 PM »
Please humble me with your wisdom and knowledge and tell me how I can separate Toluene and Benzene from Petrol/Gasoline.

Offline chenbeier

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Re: How to Separate Toluene from Petrol ?
« Reply #1 on: April 26, 2020, 04:13:46 PM »
Probably by destillation.

Offline Babcock_Hall

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Re: How to Separate Toluene from Petrol ?
« Reply #2 on: April 26, 2020, 07:25:13 PM »
@OP,

According to the forum rules, you must provide us with your thoughts before we can help you.

Offline sprotz

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Re: How to Separate Toluene from Petrol ?
« Reply #3 on: April 27, 2020, 09:43:46 AM »
Ok, I'm thinking fractional distillation by using a fractionating column, but petrol has so many different compounds that I don't know where in the column Toluene will condense. I'm wondering if there is a better option.

Offline Enthalpy

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Re: How to Separate Toluene from Petrol ?
« Reply #4 on: April 28, 2020, 04:43:09 AM »
Will fractional distillation separate benzene and toluene well and quickly from the so many compounds in gasoline?

It depends also on the goal: obtain some impure benzene and toluene, or get them pure, or remove them as completely as possible from gasoline. The targeted cost per kg also defines much.

It's very possible that further steps are needed beyond distillation, for instance crystallisation or just some solidification. Looks very interesting for benzene, which melts at +6°C while n-heptane or n-hexane with similar boiling point melt around -80°C. But toluene doesn't differ much from alkanes and alkenes.

Pressure swing adsorption, if some surface binds aromatics better?

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