Best buchner funnels for labs according to redditors

We found 6 Reddit comments discussing the best buchner funnels for labs. We ranked the 4 resulting products by number of redditors who mentioned them. Here are the top 20.

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Top Reddit comments about Lab Buchner Funnels:

u/RainyForestFarms · 2 pointsr/CannabisExtracts

Thanks for the gold!

Just for that, here's a more detailed, complete list of what is needed to micron filter smaller amounts (1l solution), with links to the cheapest good option on amazon:

Vacuum flask - http://amzn.com/B005QDP1XC - This is just a flask with a tap for a line from a vacuum source.

Hand vacuum pump - http://amzn.com/B00657XV4O - This creates a vacuum, also is handy (lol!) when finishing extracts. Just take the tube from the end and stick it on the male port on the side of the vacuum flask. If you already have a brake caliper vacuum pump or electric pump those can be subbed for this.

Buchner funnel - http://amzn.com/B00BHLE6MO - a funnel, with a space for filter paper

Rubber collar - http://amzn.com/B0018S0WBK - forms a seal between the buchner funnel and the flask. Wet your finger and around both sides of the collar, place the collar on the flask, and the funnel on the collar, and firmly press them together. This will ensure a good seal.

Medium flow rate filter paper - http://amzn.com/B00YM3R7KW - and slow filter rate filter paper - http://amzn.com/B006T5AY24 - Medium is good enough for most, and takes less time to filter, but the slow will yield the highest quality. The slow filter paper link has multiple options, be sure to select "1.5 micrometer pore, 11cm diameter" to get the right size/type.

Once it's all assembled, just pour the extract/herb solution (slowly) into the funnel, while pumping away at the vacuum pump. The vacuum will keep things flowing and you'll be done sooner than if you just let it drip through a coffee filter.

Bonus tek - to make a vacuum chamber to polish your extract:

Take a small mason jar and make a hole in the lid, big enough for the tubing from the hand pump. Take a bit of that tubing, or similar from home depot etc, and hot glue it so that it goes through the lid and into the mason jar. Really lay on the hot glue until its gobbed up all around the hole, sealing it well. Let it cool. You can now place your extract on a small bit of parchment, place it in the jar, seal the lid, and hook the pump up to the tubing. When you pump and create a vacuum (as high as this model will go, just keep pumping until the gauge registers no change), microbubbles of solvent and air will foam up to the surface, smoothening and polishing your extract. Its not a necessity like it is with BHO etc, but it's still nice to do. I even do it to some of my rosin batches as it can help them budder up.

u/noisepolicy · 2 pointsr/Coffee

What do you mean clogged filters? Were the Buchner funnels included with glass frits? There are ones without frits that can take filter paper. Here's the one I ordered: https://www.amazon.com/Deschem-350ml-Glass-Buchner-Funnel/dp/B0774CPXTL (downside is the long shipping time)

There are plenty of filter papers available. Whatman brand pops up a lot. I'll start with cutting up coffee filters.

What problem did you have with sealing them? I'm assuming the ground glass takes care of the funnel to flask connection. Maybe the filter seal at the bottom was the issue? Lots of learning to do.

Good to hear it made stunning coffee!

u/flyingdodgeball · 1 pointr/CannabisExtracts

Chemistry Hippie | 25 Micron Screens 6-pack | Essential Oil Concentrate Filter | 5x5 Inch Sheets https://www.amazon.com/dp/B018V49HFA/ref=cm_sw_r_cp_api_5cAExbCJ8AC3K

Eisco Labs Polypropylene Buchner Funnel, 13cm, Designed for 11cm Filter Paper https://www.amazon.com/dp/B00BHLE6MO/ref=cm_sw_r_cp_api_agAExb2YAPW8P

^^ a funnel like that? Then I use filters? Right now it's sitting in a glass container in the freezer, hopefully I used the right ratio of everclear to wax, lol.

u/KowaBunge · 1 pointr/CannabisExtracts

Can you post a pic? Does it not look like this SEOH Buchner Funnel Porcelain Deluxe 90mm https://www.amazon.com/dp/B00KI2F1IG/ref=cm_sw_r_cp_api_3f0GybP8SWK4X

u/jamesdal1 · 1 pointr/SteroidsHomebrewing

Deschem 1000ml,Suction Filtration Kit,200ml Buchner Funnel,1L Flask,W/70mm Filter Paper https://smile.amazon.com/dp/B07746L24N/ref=cm_sw_r_sms_apa_i_LFiSDb24FQSHA

and if you are using bb or ba use these filters

Deschem 70mm,0.22um,PVDF Membrane Filter,OD=7CM,Made By Polyvinylidene Fluoride,50Pcs/Pack https://smile.amazon.com/dp/B07B9VSGM9/ref=cm_sw_r_sms_apa_i_nGiSDbYXVCA7M