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Oil lock up of rotary vane vacuum pumps
Glad to know oil-filled machinery is not an issue :) For me it was a first.

I don't use the pump ...
20-10-2020 at 00:20
by: Heptylene
Oil lock up of rotary vane vacuum pumps
Hmm, I wish I had known about this issue a few months ago.

I recently acquired a Leybold D10E rot ...
19-10-2020 at 12:55
by: Heptylene
Cheap solvent pump that will not dissolve itself?
A syringe pump maybe? Though I must admit your exact requirements aren't clear to me. What exactly a ...
19-10-2020 at 12:29
by: Heptylene
Chemical containers?
I use a lot of 1000 ml GL45 bottles for liquids. They are great and don't leak much. I store all my ...
15-10-2020 at 00:46
by: Heptylene
PTFE / Teflon labware inclusions - normal or not?
Maybe you can sand the inside and dissolve whatever the inclusions are? Though you would need very t ...
6-10-2020 at 13:23
by: Heptylene
For those distilling at home, how do you feed water into your condenser?
At first I used water from the tap, but it's pretty wasteful. Then I moved to using a 10 liter bucke ...
5-10-2020 at 03:02
by: Heptylene
Melt-blown PP membrane from face mask
Face masks, which are suddenly available due to (thanks to?) the coronavirus pandemic contain a poly ...
30-9-2020 at 02:38
by: Heptylene
Preparation of propargyl alcohol (2-propyn-1-ol)
If you have the DOI for the article, there is a chance you can find the PDF on sci-hub. I would love ...
30-9-2020 at 01:59
by: Heptylene
Using industrial chemical processes at home
There have been attempts at the Ostwald by a few members. I know of at least chemetix's and WGTR's a ...
23-9-2020 at 05:14
by: Heptylene
Sealing the edges of a Perchlorate Cell Anode
I don't think sealing is needed. Titanium passivates when used as anode, so the parts not coated by ...
23-9-2020 at 05:05
by: Heptylene
Reaction Cooling Equipment. What's out there?
If you can find one for cheap, get a recirculating chiller. New they cost about $5k, but you can get ...
20-9-2020 at 12:17
by: Heptylene
Flat Flange lid not grounded o-ring
Maybe you can grind the glass yourself? With some abrasive compound and water on a flat surface I'm ...
17-9-2020 at 07:06
by: Heptylene
Separate EtOH and IPA
Perhaps with a packed column and distillation head you can manage some separation but it would take ...
17-9-2020 at 07:04
by: Heptylene
Amateur chemistry is putting billions at risk!
The r/chemistry subreddit is a dumpster fire in my opinion. People talking about things they don't k ...
16-9-2020 at 13:00
by: Heptylene
Vacuum aspirator using DMSO
[rquote=644666&tid=151383&author=Fyndium]When you say "sufficient for ... some vacuum distil ...
16-9-2020 at 07:28
by: Heptylene
Is it too much to ask to wear a mask?
From the article:
"Scientific American has never endorsed a presidential candidate in its 175-year ...
16-9-2020 at 01:30
by: Heptylene
Vacuum aspirator using DMSO
If you're going through the trouble of building an oil aspirator with liquid pump, tank, etc. then j ...
16-9-2020 at 01:20
by: Heptylene
latest glassware purchase
I finally have a heating mantle and it works like a charm!

[file]83225[/file]
14-9-2020 at 11:35
by: Heptylene
Suggestions for high temp oil bath?
Has anyone tried vacuum pump oil? The vapor pressure is low by design:
< 1e-8 atm at room temper ...
12-9-2020 at 02:03
by: Heptylene
Making Scientific Glassware
Glassblowing is on my todo list, it's so incredibly useful to be able to make your own custom glassw ...
30-8-2020 at 11:58
by: Heptylene
Radioactive Minerals
I can recommend [url=https://www.ebay.com/usr/impexeris]this ebay seller[/url] for geiger counters. ...
29-8-2020 at 07:28
by: Heptylene
Storing Sodium in Aluminum Bottle
Sodium reacts more slowly with ethanol than with water. You can put the sodium pieces in ethanol. An ...
25-8-2020 at 13:24
by: Heptylene
Storing Sodium in Aluminum Bottle
I store my sodium (100 g) in a glass jar with mineral oil. The type of jar with a rubber seal and le ...
25-8-2020 at 10:48
by: Heptylene
Leaking desiccator
Try spraying some coloured water on the dessicator while it's under vacuum. The water will get sucke ...
21-8-2020 at 11:32
by: Heptylene
Vacuum pump connections
Silicone tubing isn't great for vacuum, it tends to collapse in my experience. I can recommend PVC t ...
19-8-2020 at 11:13
by: Heptylene
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