The Vespiary

The Hive => Chemicals & Equipment => Topic started by: Flip on February 09, 2002, 02:38:00 AM

Title: Solvent pump
Post by: Flip on February 09, 2002, 02:38:00 AM
Where could one go about getting a good solvent pump, like for Acetone, for cheap?  Could any standard water pumps dupe for a solvent pump? I was thinking of a cooling system with acetone and dry ice.
Title: Re: Solvent pump
Post by: pickler on February 09, 2002, 07:30:00 AM
Most solvents have a low boiling point. Why do you even need a solvent pump? Just remove your solvent without a pump. If you really want one though, get a cheap one. Swim got one off of that famous online auction place, E**Y. Twenty bucks. Pulls 20"hg. Diaphram pump no oil great for solvents. Pm me if you need some more details.
We'll soon FIND OUT if I'm a chemist or not!
Title: Re: Solvent pump
Post by: goiterjoe on February 09, 2002, 11:04:00 AM
he's talking about a recirculating pump.
If Pacman had influenced us, we'd run around dark rooms eating pills and listen to repetitive music
Title: Re: Solvent pump
Post by: Flip on February 09, 2002, 12:25:00 PM
Yeah, for running through the condenser....  I could try a water pump but i'm not sure if it'll handle it. Anyone tried this B4? Anyone know where I could get a cheap solvent pump anyhow? I'd appreciate it.
Title: Re: Solvent pump
Post by: Vibrating_Lights on February 09, 2002, 12:33:00 PM
You shouldn't have been sleeping or you would have seen it jackass.
VL_
Title: Re: Solvent pump
Post by: pickler on February 10, 2002, 06:50:00 AM
Oops, swim fells kinda stupid now. ::)  ::)
We'll soon FIND OUT if I'm a chemist or not!
Title: Re: Solvent pump
Post by: Osmium on February 11, 2002, 04:59:00 PM
What do you need such a strong coolant for? Ice water will do for most of the 'standard' reactions discussed here.
I'm not fat just horizontally disproportionate.
Title: Re: Solvent pump
Post by: PoohBear4Ever on February 11, 2002, 09:17:00 PM
I think it was mentioned for condensation of MeAM, perhaps using dry ice?

PB
Title: Dry Ice Bath Details
Post by: foxy2 on February 12, 2002, 05:52:00 AM
Use a less harsh solvent and more pumps will most likely work.

Dry-Ice Bath Based on Ethylene Glycol Mixtures
J. Chem. Educ. 2000 77 629.

Bath mixtures of ethanol and ethylene glycol in dry ice produce sustainable constant temperatures over the range from -12 to -78 °C, which show a linear relationship between the bath temperature and the volume fraction of ethylene glycol. Our bath is less toxic than previously reported mixtures of ortho- and meta-xylene, and our mixture does not intractably solidify as will dry ice slurries of xylenes. Moreover, the cost of this mixture is less than that of the xylene mixtures.

http://jchemed.chem.wisc.edu/Journal/Issues/2000/May/abs629.html (http://jchemed.chem.wisc.edu/Journal/Issues/2000/May/abs629.html)



For this dry ice bath its a linear relationship,the bath temperaure rises linearly based on volume fraction of ethylene glycol.
100% Ethanol(A) = -78C
100% Ethylene glycol(B) = -12C

Temp of Bath(C)=((B/(A + B))*(-66C)) - 12C
A and B are the respective volumes

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