CrossxD
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hydrolysis of polypropylene?
I dont know if it is possible, but how about hydrolysis of polypropylene for make isopropyl alkohol?
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gdflp
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You can't just hydrolyze a polymer, you would need to depolymerize it first, then hydrate the alkene, in this case, polypropylene. This won't work in
the case of polypropylene, as a complex mixture of products is produced upon thermal cracking of the polymer, instead of cleanly producing the monomer
like some polymers. The mixture obtained contains very little propylene and separating it will be an exercise in futility, especially for something
as simple as isopropanol.
Hydration of alkenes is quite easy, dilute sulfuric acid accomplishes this quite nicely. However, this particular hydration is complicated by
propylene being a gas.
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CharlieA
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(If you are in the USA?), why not just buy isopropyl rubbing alcohol at a drugstore?
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CrossxD
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Im in czech rep. and I can only buy expensive laboratory grade isopropyl alkohol
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CharlieA
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That is a problem! Maybe you buy some from a nearby country.
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xfusion44
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This might help you:
Crude acetone is hydrogenated in the liquid phase over Raney nickel or a mixture of copper and chromium oxide to give isopropyl alcohol. This process is useful when coupled with excess acetone
production, such as the cumene process.
Source: https://en.wikipedia.org/wiki/Isopropyl_alcohol
PS: I'd go with copper and chromium oxide process, as Raney nickel is probably harder to get. You can get chromium oxide on ebay and copper is readily
available at hardware stores (but you probably already have it enough at home).
[Edited on 14-10-2015 by xfusion44]
[Edited on 14-10-2015 by xfusion44]
[Edited on 14-10-2015 by xfusion44]
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kecskesajt
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Hungary has great price of isopropanol. 5liter is about 20$.But you need to find that place.
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CrossxD
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thank you xfusion I will try it, but if I will depolymerize plastic (PP PE) in higher pressure and temperature it will meka shorter chains right? and
if there will be shorter chains there will be more propene right?
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CrossxD
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xfusion do you know what chromium and copper oxide I need?
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Amos
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There are no words.
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xfusion44
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Chromium oxide and copper metal.
Copper metal can be obtained from copper wires.
Chromium oxide is available on ebay: http://www.ebay.com/sch/i.html?_from=R40&_trksid=p205060...
I've never done this reaction, so it'd be good if somebody on this forum could tell us a little bit more about this procedure and possible
complications (if any).
Best regards 
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Nicodem
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Thread Moved
15-10-2015 at 11:39 |
MeshPL
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In neighboiring Poland isopropanol solvent is easier to come by than ethanol. But only in hardware stores. It is sometimes called Dentatural (ethanol
solvent is named Denaturat) and is sold dyed or colorless.
I think it partially replaced ethanol solvent due to issues with people drinking it.
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CrossxD
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poland is near to me thank you very much
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