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Separation Of Ethylbenzene And P-Xylene


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#1 rajkumar123

rajkumar123

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Posted 03 October 2018 - 01:37 PM

Hi all,

 

The file attached is a research paper which discusses the separation of p-xylene and ethylbenzene using extractive distillation as an alternative to parex process.

 

However parex process involves separation of p-xylene from ethylbenzene and 2 other xylene isomers, o-xylene and m-xylene. This is not mentioned in the research paper for extractive distillation. instead only p-xylene and ethylbenzene. There are a couple other papers discussing the same thing. Can anyone please explain how to obtain p-xylene and ethylbenzene mixture without o and m-xylene.

 

Thanks



#2 Bobby Strain

Bobby Strain

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Posted 03 October 2018 - 06:21 PM

It's prohibitively expensive to perform the separation. In the xylene isomerization process, the ethylbenzene is mostly converted to benzene. Ethylbenzene is produced on-purpose by alkylating benzene with ethylene using zeolite molecular sieves. One can separate ethylbenzene from the ethylbenzene-xylene stream. But if you want a mixture, you must blend the two components.

 

Bobby


Edited by Bobby Strain, 03 October 2018 - 06:23 PM.





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