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Author Topic: What is a zeolite catalyst ?  (Read 2142 times)

Offline Bored chemist

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Re: What is a zeolite catalyst ?
« Reply #25 on: 07/09/2016 21:03:30 »
Is it possible to convert long-chains alcohols (aromatics) to an electrophilic alkene ??

https://www.khanacademy.org/science/organic-chemistry
 

Offline tkadm30

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Re: What is a zeolite catalyst ?
« Reply #26 on: 08/09/2016 12:15:25 »
Quote from: chiralSPO
long chain alcohols are also NOT aromatics

Then, what is a alkyl aromatic hydrocarbon?

I have never heard the term before, but presumably it would be intended to mean hydrocarbons that contain both aromatic and aliphatic components. For instance, toluene, ethylbenzene, xylenes, mesitylene, tri-tert-butyl benzene, 2-octylnaphthalene etc.

Thanks for this info.

1) So does a zeolite-based catalytic vapor-phase alkylation of benzene (alkyl) produce ethylbenzene ?
2) What chemical reaction can possibly yield "alkyl polycyclic aromatic hydrocarbons" in the atmosphere?
 
3) Can you explain what is a (aluminium) halide ?

Thx.
« Last Edit: 08/09/2016 12:41:07 by tkadm30 »
 

Offline chiralSPO

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Re: What is a zeolite catalyst ?
« Reply #27 on: 08/09/2016 12:58:11 »
Thanks for this info.

1) So does a zeolite-based catalytic vapor-phase alkylation of benzene (alkyl) produce ethylbenzene ?
2) What chemical reaction can possibly yield "alkyl polycyclic aromatic hydrocarbons" in the atmosphere?
 
3) Can you explain what is a (aluminium) halide ?

Thx.

You're welcome.

1) Yes, it is possible for zeolites to catalyze the formation of ethylbenzene and related compounds from benzene and sources of alkayl substituents.

2) I am not entirely sure about the alkyl part, but certainly incomplete combustion of hydrocarbons is known to produce polycyclic aromatic hydrocarbons.

3) a halide is any halogen (fluorine, chlorine, bromine or iodine) with a charge of negative one (fluoride, chloride, bromide or iodide). So an example of an aluminum halide is aluminum chloride. While aluminum halides might be important for the synthesis of zeolite catalysts (I assume this is where the question comes from), it is important to note that catalysts are not consumed during the course of the reaction, so it is unlikely that the products of zeolite catalysis contain any significant amount of zeolite or zeolite components, especially if the products are then going to be fed into a jet engine (if there were any aluminum compounds in jet fuel, it would almost certainly form aluminum oxide junk inside the jet engine, and ruin the engine after only a short period of use, which would like be very expensive, if not dangerous to those in an under the aircraft)
 

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Re: What is a zeolite catalyst ?
« Reply #27 on: 08/09/2016 12:58:11 »

 

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