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pneumatician
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[*] posted on 7-5-2019 at 15:03
best alkali reistant material


hi, some new product alkali resistant now out there?

what is the best alkali resistant material, I'm talking about hot-boiling super strength alkali resistant material.
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Foeskes
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[*] posted on 9-5-2019 at 17:42


Stainless steel should work
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SWIM
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[*] posted on 9-5-2019 at 19:43


Nickel, silver and copper work fairly well too.
Somewhere on this site there's a great write-up of an alkalai fusion done in a silver plated bowl (silver is generally plated over copper ).
That reaction was at something like 300 degrees, and the bowl stood up well.
There is a similar experiment in Feiser and Feiser's Organic Experiments lab manual.
I believe they recommended a silver plated copper beaker, but it might have just been copper.
Certainly the stirrer they used was just copper.


I wonder how Monel would work...





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Tsjerk
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[*] posted on 9-5-2019 at 22:52


How mechanically stable is silver plated on glass? I've never made something like that, but I can imaging the chemical stability is the same as silver coated copper and glass might be easier to get.
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pneumatician
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[*] posted on 13-5-2019 at 18:42


Quote: Originally posted by Foeskes  
Stainless steel should work


I need to check this but flask of SS are more expensive than pure flask of silver :)

this guy try to sell this bad used little flask for 1000$

https://www.sciencemadness.org/whisper/viewthread.php?tid=12...
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Sulaiman
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[*] posted on 13-5-2019 at 18:48


Is a flask shape necessary ?
- if so then you may want to simultaneously consider whatever is after the flask ?
- if not then maybe a cheaper shape would be suitable ?




CAUTION : Hobby Chemist, not Professional or even Amateur
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pneumatician
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[*] posted on 13-5-2019 at 18:49


Quote: Originally posted by SWIM  
Nickel, silver and copper work fairly well too.
Somewhere on this site there's a great write-up of an alkalai fusion done in a silver plated bowl (silver is generally plated over copper ).
That reaction was at something like 300 degrees, and the bowl stood up well.
There is a similar experiment in Feiser and Feiser's Organic Experiments lab manual.
I believe they recommended a silver plated copper beaker, but it might have just been copper.
Certainly the stirrer they used was just copper.


I wonder how Monel would work...



is medical use so... copper do not work, if you boil alkali in copper vessel you can see how the transparent liquid turn brown.
ok thanks for the data, I check it.

I think the best is or silver or potters clay.
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pneumatician
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[*] posted on 13-5-2019 at 18:53


Quote: Originally posted by Tsjerk  
How mechanically stable is silver plated on glass? I've never made something like that, but I can imaging the chemical stability is the same as silver coated copper and glass might be easier to get.


I try with a silver plated glass flask like first step, but I need to do my own plated flask. Sometime ago I see some on sale but I not purchased it :(
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[*] posted on 13-5-2019 at 19:00


Quote: Originally posted by Sulaiman  
Is a flask shape necessary ?
- if so then you may want to simultaneously consider whatever is after the flask ?
- if not then maybe a cheaper shape would be suitable ?


if you find a flask, why not? I'm a fucking perfectionist :D

this is like end a flask after some alkali boiling and some storage. The alkali is a soft K2CO3... I have a much, much more potent alkali to play with... Maybe the best is platinium or gold but with the actual prices :)



matras_alkali.jpg - 79kBmatras_alkali2.jpg - 82kB
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[*] posted on 14-5-2019 at 09:50


Quote: Originally posted by pneumatician  
Quote: Originally posted by Foeskes  
Stainless steel should work


I need to check this but flask of SS are more expensive than pure flask of silver :)

this guy try to sell this bad used little flask for 1000$

https://www.sciencemadness.org/whisper/viewthread.php?tid=12...


No, I didn't try to sell any flask for $1000.
I haven't tried to sell any metal flask ever.
Of the thousand or so lab items I've sold in the last 3 years, none of them were sold or advertised here.
Also, the link you posted is hypothesizing on the value of a Monel flask, not a steel one.


Your description of the flask as 'bad' is no more accurate than the rest of your comment.

And as I say in that thread that those flasks cost me $10 each :) :) :)










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[*] posted on 14-5-2019 at 14:14


Quote: Originally posted by SWIM  


No, I didn't try to sell any flask for $1000.
I haven't tried to sell any metal flask ever.
Of the thousand or so lab items I've sold in the last 3 years, none of them were sold or advertised here.
Also, the link you posted is hypothesizing on the value of a Monel flask, not a steel one.


Your description of the flask as 'bad' is no more accurate than the rest of your comment.

And as I say in that thread that those flasks cost me $10 each :) :) :)



well, and many people say sponge bob is a wise guy, personal perceptions. For me, the use I want, I think your flask are unusable, SS have the SS color, "silver". put your finger inside and pass around, you can feel if the surface is smooth or rough, if exist dirt, smell, use a weak acid or alkali, rinse it and see if grab color etc... But only with the color...

You can sell the flask for the amount you want, this is called capitalism, buy cheap and sell expensive.

But this thread, it does not treat about your financial life, treat about a super alkali resistant flask.
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[*] posted on 14-5-2019 at 14:59


Quote: Originally posted by pneumatician  
Quote: Originally posted by SWIM  


No, I didn't try to sell any flask for $1000.
I haven't tried to sell any metal flask ever.
Of the thousand or so lab items I've sold in the last 3 years, none of them were sold or advertised here.
Also, the link you posted is hypothesizing on the value of a Monel flask, not a steel one.


Your description of the flask as 'bad' is no more accurate than the rest of your comment.

And as I say in that thread that those flasks cost me $10 each :) :) :)



well, and many people say sponge bob is a wise guy, personal perceptions. For me, the use I want, I think your flask are unusable, SS have the SS color, "silver". put your finger inside and pass around, you can feel if the surface is smooth or rough, if exist dirt, smell, use a weak acid or alkali, rinse it and see if grab color etc... But only with the color...

You can sell the flask for the amount you want, this is called capitalism, buy cheap and sell expensive.

But this thread, it does not treat about your financial life, treat about a super alkali resistant flask.


1: I am not offering to sell you a flask because they're not for sale.
2: Your sentence(?) about it being SS because it's silver isn't even a coherent sentence. You wander around in t and at one point seem to be trying to give me advice about something you have just admitted you are unfamiliar with.
3: It was you who posted on this thread that I was selling a 'bad' SS flask for $1000 when I am not selling anything. If you don't want to discuss my business, then try shutting your trap about it.
4: Spongebob? Are you off your meds?




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[*] posted on 24-5-2019 at 18:17


Quote: Originally posted by SWIM  
Quote: Originally posted by pneumatician  
Quote: Originally posted by SWIM  


No, I didn't try to sell any flask for $1000.
I haven't tried to sell any metal flask ever.
Of the thousand or so lab items I've sold in the last 3 years, none of them were sold or advertised here.
Also, the link you posted is hypothesizing on the value of a Monel flask, not a steel one.


Your description of the flask as 'bad' is no more accurate than the rest of your comment.

And as I say in that thread that those flasks cost me $10 each :) :) :)



well, and many people say sponge bob is a wise guy, personal perceptions. For me, the use I want, I think your flask are unusable, SS have the SS color, "silver". put your finger inside and pass around, you can feel if the surface is smooth or rough, if exist dirt, smell, use a weak acid or alkali, rinse it and see if grab color etc... But only with the color...

You can sell the flask for the amount you want, this is called capitalism, buy cheap and sell expensive.

But this thread, it does not treat about your financial life, treat about a super alkali resistant flask.


1: I am not offering to sell you a flask because they're not for sale.
2: Your sentence(?) about it being SS because it's silver isn't even a coherent sentence. You wander around in t and at one point seem to be trying to give me advice about something you have just admitted you are unfamiliar with.
3: It was you who posted on this thread that I was selling a 'bad' SS flask for $1000 when I am not selling anything. If you don't want to discuss my business, then try shutting your trap about it.
4: Spongebob? Are you off your meds?

I think he is trying to say that it is your own opinion that you were not trying to sell the flasks, which just makes it crazier. Some people think spongebob is wise has to be the worst analogy to anything I have ever heard.




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[*] posted on 24-5-2019 at 21:23


Quote: Originally posted by pneumatician  
hi, some new product alkali resistant now out there?

what is the best alkali resistant material, I'm talking about hot-boiling super strength alkali resistant material.


Have you considered HDPE plastic? ... For common commercial grades of medium- and high-density polyethylene the melting point is typically in the range 120 to 180 °C . It is very resistant to alkali environments.




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[*] posted on 25-5-2019 at 01:50


Yes, but super strength alkali doesn't boil below those temperatures.
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[*] posted on 25-5-2019 at 03:23


Nickel
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[*] posted on 25-5-2019 at 05:45


just get a pressure cooker, you can replace the lid seal with something more resistant if you want
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