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Author: Subject: Shedworld Reloaded
DFliyerz
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[*] posted on 12-5-2016 at 07:38


So, so jealous! It's like watching porn for a chemist. But now I know what I want my work space to look like, once I move out in a few years and get my own place.
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aga
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[*] posted on 20-5-2016 at 09:08


Quote: Originally posted by DFliyerz  
So, so jealous! It's like watching porn for a chemist.

The absorbent towel is behind you next to the door ;)

Finally i got the front doors/windows done.

It is basically a sash window, with each pane sliding independently.

half.JPG - 96kB full.JPG - 96kB

Just the lead counter-weights to melt & cast and it's basically done.

The photo below shows the proper way to calculate the precise required mass of the lead counter-weights.

(fold some bits of lead pipe in half and hang it on the wire).

weight.JPG - 110kB

With the front closed, it is apparent that the extractor fan i bought is crap. The cheaper old one was better.

Definitely going to replace that, which will be easy as the fan unit was designed to make it easily replaceable :)




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Magpie
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[*] posted on 20-5-2016 at 10:01


Quote: Originally posted by aga  

With the front closed, it is apparent that the extractor fan i bought is crap.


What do you mean here? With the front closed is there any way for air to enter the hood?

How wide is your hood?




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aga
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[*] posted on 20-5-2016 at 11:12


The front control-panel bit is the 'airfoil' part, although not really designed as such, just built in that general shape.

The front door/window is in no way air-tight, allowing air in throught the bottom part (at least) at all times.

The hood is 1040mm wide by 860 high by 600 deep.

The idea with the baffle & ducting was that air would be sucked strongly at the top and bottom of the back of the hood, and it is not.

A puff of cigarette smoke under the bottom of the front door just hangs about, then gradually makes it's way to the exit ...

[Edited on 20-5-2016 by aga]




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aga
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[*] posted on 20-5-2016 at 13:11


Been a long time since i melted and poured Pb - lotsa fun !

melt.JPG - 128kB

The mould for the counterweights was just some slightly damp sand in a big pan, with a silicone sealant tube as the 'form'.

All i need is a rough hole in the middle, so a bundle of welding rods wrapped in Al foil serve well. As they are individual sticks, it's much easier to pull them out one-by-one than it is to pull 1 big metal bar out of there.

mould.JPG - 116kB

Just pour in the lead ...

pour.JPG - 132kB

... and tadaaaa ! A Lead counterweight for my fume hood sash door/window thing.

cast.JPG - 138kB

They are a bit too wide, and catch on other things, so i'll melt them all down again tomorrow and make thinner, longer ones.

Woohoo !

Edit:

One-finger to the sash door/window.whatever it's called (and there's no lube !) :

Attachment: action.wmv (810kB)
This file has been downloaded 281 times

[Edited on 20-5-2016 by aga]




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[*] posted on 21-5-2016 at 12:50
Happiness


Re-melted/cast thinner counterweights and they work really well : even better now they have some grease-lube.

The extractor actually does quite well with light fume production when the doors are shut (still a gap at the bottom).

First thing was to try distilling the 250ml bottle labelled 'Failed EtOH/Cl2' from the first step in the TCA attempt a good few months ago.

1.JPG - 92kB 2.JPG - 89kB 3.JPG - 78kB

I did have a sense of being slightly drunk and some euphoriah, although that was very likely due to beer and happiness rather than chloral hydrate fumes.




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glymes
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[*] posted on 21-5-2016 at 13:02


Oh wow.

By the way, did you not notice the way you mentioned lubricant, an absorbent towel and pornography all on the same page? :D
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aga
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[*] posted on 21-5-2016 at 13:06


Quote: Originally posted by glymes  
Oh wow.

By the way, did you not notice the way you mentioned lubricant, an absorbent towel and pornography all on the same page? :D

I did not notice.

Surprised you used no LaTex in that comment ;)

[Edited on 21-5-2016 by aga]




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glymes
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[*] posted on 22-5-2016 at 10:04


Oh dear.
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aga
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[*] posted on 22-5-2016 at 11:58
Sadness


Distilled the failed EtOH chlorination stuff twice today.

Each time the B.P. of the fractions are miles away from chloral hydrate etc.

Messed for a while by adding conc sulphuric to it, then gave it up as a bad job.

Then properly disposed of it all (set fire to it).

Better to start again with Known reagents and keep the water out.

[Edited on 22-5-2016 by aga]




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