Author Topic: 24/40 or 19/22  (Read 1844 times)

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Throb

  • Guest
24/40 or 19/22
« on: May 16, 2000, 06:25:00 PM »
SWIM is about to get a distillation apparatus but he don't know if 19/22 or 24/40 is better for him.  He told me it was for small scale experiences. 

What's the difference between 19/22 and 24/40?  I'm not talking about the difference between the two size but the difference between applications and what you can do.

Danke,

Throb


deltaT

  • Guest
Re: 24/40 or 19/22
« Reply #1 on: May 16, 2000, 06:58:00 PM »
Ah, not application but what you can do. In that case SWIMS should get 24/40. And for other reasons. 24/40 is truly the standard in the industry. Most other glass pieces seem to be so much more readily available in the 24/40 size.


Osmium

  • Guest
Re: 24/40 or 19/22
« Reply #2 on: May 17, 2000, 04:18:00 AM »
Attention non-US bees: don't buy 24/40 or 19/22. Such glassware is occasionally available, but those joint sizes aren't used often in Europe. Think 29/32. Or 14/23 for small scale.


Rhodium

  • Guest
Re: 24/40 or 19/22
« Reply #3 on: May 17, 2000, 03:31:00 PM »
I can agree that 24/40 is pretty uncommon, but not so with 19/22. I believe 29/32 and 14/23 setups should be completed with a 19/22 one to make sure one has a setup for every reaction size.

If I would have to use only one size setup, I would choose 19/22.

The cutest setups are about 10/20 in size, but they are so rare I've only seen two in my life.

http://rhodium.lycaeum.org


budwizard

  • Guest
Re: 24/40 or 19/22
« Reply #4 on: May 18, 2000, 10:17:00 AM »
This cat that used to be a dog left me a note that said that 24/40 glassware was too big for the reactions he tried, especially distillation, unless you're distilling like more than 1L. In smaller volumes the cat/dog said the vapor tended to have problems. Remember as you distill to switch to smaller sized flasks as the volume in the distilling flask gets too low.

THE BUDWIZARD

randolph_carter

  • Guest
Re: 24/40 or 19/22
« Reply #5 on: May 18, 2000, 12:36:00 PM »
the lizards on callisto seem to concur with the 19/22(occasionally labeled 19/38...go figure...)size....
the usage of that size is great tasting and less filling....
not as much waste and distillation column "holdup"....
but as has been mentioned not "everything" is available in 19/22.....
but then not "everything" is available in 24/40 either...
or 14/20 for that matter...

in 19/22 sets....
max size normally is 500ml flask without adapter...
swim found a 1l flask in "clearseal joints"....
swim has seen 5l 24/40 reaction flasks attached to an otherwise 19/22 sized "set" in dreamscapes that for all intents and purposes were fine in a dream within a dream....

just light on a beam.....



"remember little ones, love is real,not fade away, so pass some on today......"

CherrieBaby

  • Guest
Re: 24/40 or 19/22
« Reply #6 on: May 24, 2000, 02:30:00 PM »
yes - there does seem to be a difference between the USA and the rest of the world! - size matters. In the UK 24/29 is a handy common size. 29/32 is rare - it usually has to be specially ordered.



mnm

  • Guest
Re: 24/40 or 19/22
« Reply #7 on: May 28, 2000, 06:59:00 AM »
Kids around here say 24/40 all the way!


-mnm




harry_lime

  • Guest
Re: 24/40 or 19/22
« Reply #8 on: June 01, 2000, 11:05:00 AM »
Same with Aus 24/29


Fuchem

  • Guest
Re: 24/40 or 19/22
« Reply #9 on: June 03, 2000, 07:22:00 AM »
One benefit of going 19/22 is price. On Ebay, 19/22 goes for lots less almost every time. It is a great size for short naps and small dreams. For the true microscale dreamer, the Kimble microscale kits are the cutest thing ever!


blondie

  • Guest
question about 14/23
« Reply #10 on: November 18, 2002, 04:14:00 PM »
what is the largest flask size that would be practical to use with 14/23 sized quickfit joints - for both distillation and reflux? some manufacturers carry only small pear shaped flasks 20-50ml in 14/23 while others have them up to 500ml. is there any reason why a 14/23 setup could not be used with a 250 or 500ml rb?

pickler

  • Guest
Blondie, you gotta think about getting that ...
« Reply #11 on: November 18, 2002, 06:45:00 PM »
Blondie, you gotta think about getting that stirbar into the flask. Try having a 3l rbf with a 19/22 joint. Youwon't be able to get the proper size stirbar in there to stir it. Swim had this happen to him in the very begining. Bought all 19/22stuff and realized it's only good upto a certian size. 24/40 is a good size for your average bee.

I went into the business for the money, and the art grew out of it.-Charlie Chaplin


terbium

  • Guest
Quickfit?
« Reply #12 on: November 18, 2002, 09:43:00 PM »
14/23 sized quickfit joints
What is a "quickfit" joint? Is it the same as "Standard Taper"?

Baseline Does Not Exist.

BlingBling

  • Guest
45/50 rb's n' condensors.
« Reply #13 on: November 19, 2002, 03:16:00 AM »

pHarmacist

  • Guest
Isn't The Couch aimed for other B.S.?
« Reply #14 on: November 19, 2002, 03:20:00 AM »

BlingBling

  • Guest
Sorry.
« Reply #15 on: November 19, 2002, 03:24:00 AM »
24/40 is great if you live in North America.

blondie

  • Guest
14/23
« Reply #16 on: November 19, 2002, 09:15:00 PM »
Madmax and Pickler thanks for the good advice - seems like i am going to have to stretch the budget.

Terbium, I meant generic glassware with standard taper when i wrote 'quickfit' - however checking google i see that this is a actually a manufacturer. thanks for the clarification.

PolytheneSam

  • Guest
You can use adapters for connecting together the ...
« Reply #17 on: November 20, 2002, 03:27:00 AM »
You can use adapters for connecting together the different sizes.

http://www.geocities.com/dritte123/PSPF.html


The hardest thing to explain is the obvious

methium

  • Guest
yes
« Reply #18 on: December 16, 2002, 12:51:00 AM »
Hell just go ball and socket and eliminate the "size" issha altogether. ;)

By the time you finish reading this, another person will want to learn to make meth.

terbium

  • Guest
Ball and socket ...
« Reply #19 on: December 16, 2002, 06:41:00 AM »
have sizes also which still need to be matched up.

Baseline Does Not Exist.