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Author: Subject: latest glassware purchase
j_sum1
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[*] posted on 18-11-2020 at 19:26


Quote: Originally posted by Heptylene  
I just got an Anschütz-Thiele receiver, which is the german version of the Perkin triangle. I've been trying to find one for some time now since they cost an arm when new. Thankfully, ebay exists and an opportunity finally presented itself :)

This is actually a really useful piece of equipment: it allows the collection of many fractions during vacuum distillation without having to bring the whole apparatus back to atmospheric pressure. Normally you are limited to 3-4 fractions if you're using a cow receiver, but not with this!

That is gorgeous, Heptylene. Nice acquisition.
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[*] posted on 27-11-2020 at 03:36


Heptylene congrat. Recently I managed to buy Anschütz-Thiele receiver too :)

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here nicely explained how does it work:
https://www.bcp.fu-berlin.de/chemie/chemie/studium/ocpraktik...
https://en.wikipedia.org/wiki/Perkin_triangle




If there is a heaven, it seems not to be materially based. Does chemistry exist there and if yes, how does it look like? Are there good souls well supplied with laboratory equipment, glass, chemicals and information?
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HydrogenSulphate
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[*] posted on 29-11-2020 at 13:15


Some GL45 reagent bottles. I really like these! Although they are not exactly cheap, they are of high quality. There are red cap versions, which have a PTFE liner. The PTFE lined ones are even more expensive. Do you think that the blue cap bottles will suffice for most situations? When would you prefer the red caps over the blue caps?

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[Edited on 29-11-2020 by HydrogenSulphate]
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[*] posted on 29-11-2020 at 13:22


Quote: Originally posted by Db33  
i posted that i needed some good dry/wet chem storage bottles. So i found a lot on eBay the guy was selling the lot for $85 but he accepted my offer for $50 so im very happy with the deal. You cant see it but theres also a top shelf with a lot of tiny vial sized bottles. I actually got this little cupboard specifically for this so i think its a pretty good start.




I am a big fan of the old fashioned Apothecary bottles. Adrian ('Plasticraincoat1' or 'Adrian's Chemistry Laboratory' on youtube) has a lot of the old fashioned bottles in his lab

[Edited on 29-11-2020 by HydrogenSulphate]

[Edited on 29-11-2020 by HydrogenSulphate]
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[*] posted on 29-11-2020 at 13:22


I was browsing online for gifts for other people, and then couldn't resist buying myself a couple cheap nickel crucibles from AliX. I'm hoping to hydrolyze piperine to the acid without a twelve-hour reflux (higher temp, ethylene glycol, KOH).



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[*] posted on 19-12-2020 at 10:40


i found someone IN TUNISIA willing to sell me a flask for 6$ but the condenser is a bit expensive i guess 28$ but idk where to find adapter so i can use this just for reflux

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[*] posted on 19-12-2020 at 11:13


Quote: Originally posted by HydrogenSulphate  
When would you prefer the red caps over the blue caps?

When storing something like bromine or low boiling stuff like ethyl ether or bromoethane
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[*] posted on 12-1-2021 at 12:49


Here without looking for them I found these Anschutz-Thiele receivers with good price and various joints sizes:
https://www.ebay.com/itm/14-23-19-26-24-29-29-32-Female-x-Ma...
https://www.ebay.com/itm/182711306166
https://www.ebay.com/itm/14-23-Female-x-14-23-Male-Joint-Gla...




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[*] posted on 14-1-2021 at 04:55


I have been after some cheap SS 1/4" VCR hi vacuum/pressure gas fittings for some time. I finally won an auction on a job lot of used ones for £12.50. They arrived today. I did not win 55mm diameter vacuum valve that i also needed. That sold for more than £100.

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cool.gif posted on 30-1-2021 at 12:13


So you guys probably saw these kits flood the Chinese shill vendors who may or may not have warehouses right next to you(but it always says they do).

Looks like the 'guild' has raised the price. My order went like this:
posted as ~$60 or best offer. Hmmmm, normally for $60USD i might get two of those items at best. So i went through his history for this item, and almost all the orders said "accepted offer". So brazenly, I offered $7 below asking. I said it was a great deal but i'm very poor. Response was warm and friendly. And discount #1: he countered at $3.00 below asking price. I said hell yes.
So then of course i get a tracking number that for over a week is stuck at "waiting for package to arrive at facility/" I know what this means. I sent him a message saying I thought that was a bit sleazy, since the marketing included a map of my country with regions showing either 1, 2, or 3 days! I was in the 2 day zone.
BAM: Instant Discount #2 - $10 refunded to my PayPal right away.

I kind of have to now confess that this is the best deal ever for glassware. It is branded, however the company's name is in Chinese characters. But the Glassware is up to par with Deschem if not better.
The cut out foam is now the 'case' for safe storage.
The leibig and the vigereux column are so much longer in real life than it looks like in the picture. This really makes a huge difference for distillations.
The addition funnel has some new design for its stopcock that I cannot explain. But somehow it allows both for perfect drip...drip.. control, and yet if a bunch of salt or gunk clog up the bottom, i can turn it and it all plops out. It's the perfect separation stopcock.
Yes I have enough 3-way adapters now to last me several life times.
Lastly: I was SURE i had received the wrong keck clamps at first, they looked like 19/x. Then I thought 'hmmm', with some extra thumb muscle, it snaps on, and it SNAPS on any joint. Like these keck clamps will hold big flasks and condensors while they patiently wait for me to find my support hardware(do not do that ever, so stupid)
(the thermometer went up to 100C and broke the first day. Nothing else has broken at all)





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[*] posted on 30-1-2021 at 13:51


I don't know who and how these glassware are made, but for the price, someone's gotta do them very fast and easy, or then they get paid pennies. What I've watched glassware making videos, it's not difficult for a professional glassworker to churn out a pressure compensated funnel, but it still takes it's time.

I mean, you get dozen of hours of work worth of glass with $60 including shipping.
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[*] posted on 30-1-2021 at 15:22


just got a new 500ml triple neck, five stoppers, a gas inlet and a couple glass petri dishes from nanshin. amazingly, only took three weeks from china.



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[*] posted on 30-1-2021 at 17:15


Quote: Originally posted by Fyndium  
I don't know who and how these glassware are made, but for the price, someone's gotta do them very fast and easy, or then they get paid pennies. What I've watched glassware making videos, it's not difficult for a professional glassworker to churn out a pressure compensated funnel, but it still takes it's time.

I mean, you get dozen of hours of work worth of glass with $60 including shipping.


One of the Dutch companies that's famous for making cannabis bongs a la scientific glassware has a documentary where they reveal their process.
Robots. Robots that can hold glass tubes, robots with 8 arms, each one with an oxy-acetylene torch extending simultaneously, and so on.

I have basic training in glass work, and you're absolutely right, if these were man made. The reason I say it's quality work is because i examined the usual stress spots. Such as inside meets water jacket meets air meets ground glass joint on a condenser. Traditionally this required a human's attention, as the thickness required is not linear relative to amount of glass. The Chinese are smart.

Why pennies to us is a working wage to them, is a matter beyond the scope of this chat of course=D


edit: here's a better pic. I tried my best to show probably my favorite piece in the set, and why it impresses me so much. One would really need to hold it, and use it, to see what I mean. That 2nd neck tangential to the overall sphere is not trivial.
[Edited on 31-1-2021 by earpain]

[Edited on 31-1-2021 by earpain]

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Fyndium
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[*] posted on 1-2-2021 at 10:23


Latest purchases:

6000mL triple neck flask
5000mL quad neck flask
300mm thermowells, which I already shortened to proper length with burner
New graham and coil condensers
Glass thimble for soxhlet
30mm test tubes, lot
Different sized joint adapters for 7mm glass tube for bleeder tubes and fuororubber o rings for them and for stirrer adapters
Overhead stirrer
Heating mantle with stir and probe
Delrin stock to mill more rigid boss heads
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[*] posted on 9-2-2021 at 10:19


This was my biggest glass purchase in my life, it arrived on pallet, usual way in carton / styrofoam box (as from ebay from China) was not sufficient now. I expanded my shopping activities abroad. I can buy all these items in my country too, but here they are 2-3-4 times more expensive.
I definitely suggest chemland.pl
There is a limit that you have to place and order of 150 EUR or above. The final price shown in eshop cart is without VAT. The VAT in PL is 23%.
The shipping cost of the pallet transport for me was 60 EUR (including VAT) for 1 pallet upto 150 kg, I'm living in the neighbouring country so shipping into further country is certainly more expensive, it seems they ship to the whole EU. When ordering less or smaller items which could fit into standard carton / styrofoam box instead to pallet the cost of transport could be very likely lower.
I couldn't make a photo of everything unpacked, so only the most valuable pieces for me - dropping funnels with pressure equalizing and long powerful condensers (the shorter one has 40 cm long active cooling part and the rest 60 cm).
The Glassco brand ground glass joints are higher quality, the Chemland brand ground glass joints have slightly less accuracy but still OK for home lab (grease fills and closes every gap). I selected Glassco everywhere possible (e.g. RBF).

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[Edited on 9-2-2021 by Fery]




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[*] posted on 22-2-2021 at 14:06



Been keeping the postman busy lately. Not pallets-of-stuff busy, but still.
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[*] posted on 22-2-2021 at 21:48


Quote: Originally posted by Fery  
long powerful condensers (the shorter one has 40 cm long active cooling part and the rest 60 cm)


I noted that condensers choke quite easily when pushing too hard. I got an issue with exothermic reaction which was near boiling over as condenser quickly filled with condensed liquid. 24* are more prone than 29*. I'd choose 45* joint for any larger condenser need nowadays.
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[*] posted on 22-2-2021 at 23:10


Fyndium that's true. The condensers which I've bought are all 29/32.
Condensers with ground glass joints 45/40 are available too. For these bigger joints there are flasks of volume 250, 500, 1000, 2000, 4000 ml.
6 as well 10 L RBF have even bigger joints 60/46.
But a 29/32 condenser like this is wide enough not to choke at condensate flow certainly more than 20 ml per second




If there is a heaven, it seems not to be materially based. Does chemistry exist there and if yes, how does it look like? Are there good souls well supplied with laboratory equipment, glass, chemicals and information?
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