aliced25
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Realistic Microwave Modifications
I've been looking around at the various microwave modifications that have been suggested, and to be frank, most of them look not only dangerous, but
somewhat insane. There are a list of Microwave modifications attached. I like the continuous flow reactor by Bagley, et al (see both the article and
the pictures in the supporting documentation). Now that is something that could be made by the average amateur an oversize test-tube passing through
the top of the cavity with a flange/gasket/lid assembly with various inlets/outlets.
Attachment: Bagley.etal.A.Simple.Continuous.Flow.MW.Reactor.Note.pdf (152kB)
This file has been downloaded 973 times
Attachment: Bagley.etal.A.Simple.Continuous.Flow.MW.Reactor.Supporting.Information.pdf (1.9MB)
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Attachment: Brooks.Douthwaite.MW.Induced.Plasma.Reactor.Based.on.a.Domestic.MW.Oven.for.Bulk.Solid.State.Chemistry.pdf (316kB)
This file has been downloaded 897 times
Attachment: Cablewksi.Faux.Strauss.Development.of.a.Continuous.MW.Reactor.for.Organic.Synthesis.pdf (713kB)
This file has been downloaded 1320 times
Attachment: Pouget.Modification.of.a.Commercial.MW.Oven.for.Appications.in.the.Chemical.Laboratory.pdf (412kB)
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Attachment: Raner.Strauss.Trainor.A.New.Microwave.Reactor.for.Batchwise.Organic.Synthesis.pdf (1.4MB)
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Attachment: Strauss.Trainor.Invited.Review.Developments.in.MW.Assisted.Organic.Chemistry.pdf (1.3MB)
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Attachment: Yuen.Hameed.Recent.Developments.in.the.Preparation.and.Regeneration.of.Activated.Carbons.by.MW.pdf (475kB)
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From a Knight of the Realm: "Animated movies are not just for kids, they're also for adults who do a lot of drugs." Sir Paul McCartney
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Organikum
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Yes its possible.
[Edited on 22-4-2013 by Organikum]
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aliced25
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I am actually looking for a quartz tube with a flange - to put through a hole in the top of the oven - then a lid with holes in it that can be used
depending upon what is being made and a bolted SS connector to hold the lid to the flange to the MW. Quartz would be best, as then higher temperatures
would be possible and I sincerely want to try the SiCl4/POCl3 reactions. Imagine, amateurs having those two on tap
From a Knight of the Realm: "Animated movies are not just for kids, they're also for adults who do a lot of drugs." Sir Paul McCartney
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Organikum
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Sure.
I would like to have wings so I can fly but alas.....
The difference is that this exists, is working and experience is gathered in the field of microwave chemistry but yours is just a kids wish for
christmas which will go unfullfilled.
Better so, probably.
/ORG
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franklyn
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The cooking microwave provides heating by another means. Polar molecules
are excited by the 2.45 Ghz radio frequency emitted which is resonant with
water. The only real advantage it provides is high temperature in the gas phase
for producing plasma. A different emission frequency requires a magnetron
specific for that or else fabricating your own.
Removing the power supply and magnetron from the cooking microwave
cabinet is better than trying to fit some retrofitted reactor vessel inside it.
You just need to be cognizant that the metal oven housing provides safety
by blocking the waves generated which are confined within it. Microwaves
pass through walls and fry electronics. Feeling heat prevents actual harm
to people or animals as you immediately recoil from exposure to the beam.
The possibility that proteins in the humor or cornea of your eyes can
coagulate from prolonged low power exposure requires proper shielding
when powered up , metal screen mesh.
How a microwave oven works ( basic parts & function )
www.youtube.com/watch?v=dPgV5xDZBng
Newer microwave hi-voltage supply (inverter type)
www.youtube.com/watch?v=Vchhc7SLcaw
Fixing Panasonic inverter microwaves (replacing older transformer (MOT)
www.youtube.com/watch?v=hBJJU4ZRh7U
Scavenging ovens thrown away
www.youtube.com/watch?v=TVkioe3PJz0
Magnetron teardown
(no reason to do this except to salvage the ceramic magnets)
www.youtube.com/watch?v=j3k6L8bLUqI
www.youtube.com/watch?v=4Zev8Ws4P1Y
Magnetron construction and operation explained
www.youtube.com/watch?v=qT6EmMkKevY
Measuring the voltage and current of a microwave oven magnetron
www.youtube.com/watch?v=I2k2g00onL0
Good description of the Half-Wave Voltage Doubler function
www.microtechfactoryservice.com/doubler.html
Mapping field intensity inside the oven (determing the cold spots)
www.youtube.com/watch?v=NIjcNIR_Yg8
www.youtube.com/watch?v=pxI1ZjLLdb8
Homemade magnetron
www.youtube.com/watch?v=Uk_MZ22OVyg
www.youtube.com/watch?v=bsJjBpqo3Kk
Magnetron's emitter waveguide directed at a wire
www.youtube.com/watch?v=3DofLTIDszI
Magnetron used as a microwave gun
www.youtube.com/watch?v=DoOT2_Z-GIE
www.youtube.com/watch?v=CMgaEvQsXrc
www.youtube.com/watch?v=Bhnp2-l1cxY
The Poor Mans Ray Gun
72.52.208.92/~gbpprorg/mil/herf/The_Poor_Mans_Ray_Gun.pdf
www.youtube.com/watch?v=ZmWu31eccY0
www.youtube.com/watch?v=c9sBkjcFYbc
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Bot0nist
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Thank you franklyn! That was a hearty spoon.  . I never had much intrest in
microwaves or knew much about them. The link buffet made it impossible to ignore any longer.
assimilated...
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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aliced25
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Quote: Originally posted by Organikum  | Sure.
I would like to have wings so I can fly but alas.....
The difference is that this exists, is working and experience is gathered in the field of microwave chemistry but yours is just a kids wish for
christmas which will go unfullfilled.
Better so, probably.
/ORG |
And the truth is that you've never had a truckload of glass confiscated on trumped up charges, never to be returned. You've never faced 40 years for
logging into a website and owning "apparatus", so cut the shit. When your part of the world is as shitty as this part, I'll be surprised if you are
willing to post pictures of glassware. Thanks to Assange, et al, it is going to get worse here not better and I am sick to death of being a test-case
for the prosecution.
Enjoy your system, it looks good and I'm assuming the condenser is absorbing most of the MW radiation (presuming there is H2O running through it). I
sincerely wish I could simply have my old glass back and I'd give you a run for your money
From a Knight of the Realm: "Animated movies are not just for kids, they're also for adults who do a lot of drugs." Sir Paul McCartney
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aliced25
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Now one thing that has me a little bit interested is the microwave kiln's (http://www.microwavekiln.com/KILNINSTRUCTIONS.HTM), they are a simple section of alumina tube with two end caps, with a coating of a microwave
susceptor painted onto it. Now, fine powdered silicon carbide is cheap and easily acquired, so are polysilicones which allow the preparation of
ceramics (http://pubs.acs.org/doi/abs/10.1021/cm00027a007) when the painted on mixture is fired (ie. microwaved). I'd imagine the fumes would be unpleasant,
but there you go there's one microwave modification that allows for a high tempurature, plus a MW free working environment (the SiC absorbs basically
ALL of the MW, the area in the middle is heated by the heat given off by the SiC, not the MW. Put a crucible in there, even a metal crucible and it
will be rapidly heated (hllp://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADP007756), melting whatever is inside it,
or causing it to react. That being so, if the system were taken beyond the top of the MW it could be used for vacuum distillation of whatever.
[Edited on 3-5-2013 by aliced25]
From a Knight of the Realm: "Animated movies are not just for kids, they're also for adults who do a lot of drugs." Sir Paul McCartney
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Organikum
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| Quote: Originally posted by aliced25 | Now one thing that has me a little bit interested is the microwave kiln's (http://www.microwavekiln.com/KILNINSTRUCTIONS.HTM), they are a simple section of alumina tube with two end caps, with a coating of a microwave
susceptor painted onto it. Now, fine powdered silicon carbide is cheap and easily acquired, so are polysilicones which allow the preparation of
ceramics (http://pubs.acs.org/doi/abs/10.1021/cm00027a007) when the painted on mixture is fired (ie. microwaved). I'd imagine the fumes would be unpleasant,
but there you go there's one microwave modification that allows for a high tempurature, plus a MW free working environment (the SiC absorbs basically
ALL of the MW, the area in the middle is heated by the heat given off by the SiC, not the MW. Put a crucible in there, even a metal crucible and it
will be rapidly heated (hllp://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADP007756), melting whatever is inside it,
or causing it to react. That being so, if the system were taken beyond the top of the MW it could be used for vacuum distillation of whatever.
[Edited on 3-5-2013 by aliced25] |
Graphite spray from the automotive shop sprayed on porcelan works fine to make crucibles or tubes heating up in microwaves as mad. Or you stick a
ceramic tube in another and fill the void with activated charcoal. This gives even higher temperatures.
But of course thats just heating there is no microwave effect on the reaction whatsoever as the radiation doesnt reach the reagents anymore.
Thats not microwave chemistry IMHO.
/ORG
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aliced25
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No, it is microwave metallurgy - silico- and aluminothermic reactions in which hard to get at metals can be got at without the need for a box furnace.
Reduction of Phosphorus absorbed on carbon, or with silicon, etc. would be possible, maybe even lithium
http://www.programmaster.org/PM/PM.nsf/ApprovedAbstracts/C77...
http://www.onemine.org/search/summary.cfm/Laboratory-Prepara...
http://onlinelibrary.wiley.com/doi/10.1002/9781118663448.ch2...
http://web.mit.edu/dsadoway/www/81.pdf
http://en.cnki.com.cn/Article_en/CJFDTOTAL-METE200302010.htm
http://www.arcus.msisa.ru/users/files/file72723-1197279908.p...
http://tinyurl.com/cvg4kzq
It may not be MW chemistry, but it could provide something useful. Calcium can also be produced in a similar fashion. The vacuum under discussion is
within the range of a sliding vane pump, so things might be achievable.
[Edited on 4-5-2013 by aliced25]
From a Knight of the Realm: "Animated movies are not just for kids, they're also for adults who do a lot of drugs." Sir Paul McCartney
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