02-09-02 02:38
No 267222
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.
(Hive Bee)
02-09-02 07:30
No 267319
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!
(Hive Addict)
02-09-02 11:04
No 267369
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
(Stranger)
02-09-02 12:25
No 267380
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.
(Hive Bee)
02-09-02 12:33
No 267384
You shouldn't have been sleeping or you would have seen it jackass.
VL_
(Hive Bee)
02-10-02 06:50
No 267630
Oops, swim fells kinda stupid now.
We'll soon FIND OUT if I'm a chemist or not!
(Stoni's sexual toy)
02-11-02 16:59
No 268075
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.
(Junior Service Representative)
02-11-02 21:17
No 268139
I think it was mentioned for condensation of MeAM, perhaps using dry ice?
PB
(Distinctive Doe)
02-12-02 05:52
No 268379
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/Iss
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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