[Andrey Mikhalchuk] is trying to collect a set of basic laboratory equipment. Specifically, he was looking for hardware that would allow him to quickly filter solids from liquids. He first added a cotton pan to the plastic funnel. It can do the job, but it will be slow when affected by gravity. Even if the filter is severely clogged with particles, he needs a way to speed up the flow.

There is a solution to this problem. This is a glass container called Büchner Flask. These have glass tubes extending from the neck. By connecting a vacuum pump to this tube, the reduced pressure in the flask will immediately pull the liquid through the filter. [Andre] did not purchase special items, but changed a rubber stopper to accommodate the funnel and glass tube. This is a cheaper version because it uses an ordinary Erlenmeyer flask, but it also works fine. To create a vacuum, a modified bicycle pump was used. Check out the videos of these two hackers after the break.

They had better not filter solids from the smoke before smoking, because that would be disgusting.

Don't ask how I know...

Seriously, this is using some resourcefulness to achieve the desired result.

As a chemist, one of the best ways to make a cheap vacuum cleaner is to use running water, using Bernoulli's principle: add a T to the tap and let the water flow through the "top" part of the T. The vacuum will be formed at the bottom, so connect your tube to it. This is a cheap and effective method, although it does waste water.

There are many such clever suggestions in the old "Scientific American" project book...

http://www.amazon.com/Scientific-American-projects-amateur-scientist/dp/B0006AWNUE

The glassware hacker is not even outdated. Sadly, I saw that even for used copies, only 2 copies are available and the price is over $50.

In the 1970s, I spent a lot of time reading that book in the high school library; it is outdated, but the ingenuity and creativity shine through. If Hackaday is a companion website for major scientific journals, it is the book.

(The sadder news is that today's SciAm is a pale shadow compared to the era when such books could be accumulated from its columns.)

Wow, when you post a URL that happens to be an Amazon book link, does Hackaday always extend it like this?

Oh, even if I am a known user, it is still waiting for review?

Accessories should be made for your vacuum cleaner. This will speed things up: -P

LMAO. Wow-so now your feature is a kindergarten-level "hacker". very good.

I am with DdD-why make a crappy vacuum pump when you can get your faucet to do the job?

There should indeed be an intermediate container in this setup.

It seems that the job of filtering apple juice from the pulp has become easier.

Here comes the hard cider!

Yes, I agree with localroger. When I was a kid, even old books were made with better old technology, but the material is A, even the popular mechanics is 10 times better. 1 time I found my dad A book with a strange shape I bought in the garage is as thick as a big phone book, but the page is only half the width (I think you can take it anywhere) and it has all the Macgyver known to man at the time Hack, laboratory, electronics, build anything, repair almost anything...A few years later, my buddy brother is in class and enters the FBI, instead of the burnt orange of the 70s, it is black, Same shape and size, but black! It has a strange title but I just remember other people remember this book?

TheCreator: Great idea! However, there is a problem with the vacuum cleaner...When the funnel is empty, it starts to suck in air through the system and can suck up a drop or two of product.

The question now is what are you filtering. If it's just dirty water, the vacuum cleaner may be fine, but it smells bad. If it is ferric chloride (what I built it for)-that is a completely different story, and not long (for vacuum cleaners).

The pump is safer. It also does not require batteries, so you can use it outdoors. If it picks up something bad, you can always buy another one for a few dollars.

Okay Localroger... don't know why my Amazon ID is better than yours, but http://www.amazon.com/gp/offer-listing/B0010XX7EW/ref=dp_olp_0?ie=UTF8&redirect=true&condition= all

1. If you can quickly rotate the funnel filter before/before/when the vacuum is turned on, the sediment should slide outside to keep the center fairly clean so that the liquid can pass through faster.

2. This is an interesting little file for science lovers, from 1861: ftp://ftp.sac.sk/pub/sac/educult/science.zip

As a biochemist, I have used Buchner flasks with Buchner funnels hundreds of times. I like this homemade version, although I doubt if I will use it in the lab :) However, we used a very similar version (no filter, only two tubes on top) to create between the Buchner flask and the vacuum Source of vacuum trap.

I recommend cutting off the upper part of the filter he is using, then cutting and gluing a cylinder in place. Install a circular plastic disc at the junction of the cylinder and the inclined area with a hole distance of about 2-3 mm (just like he did with a plastic milk cap). This will give you a decent Buchner funnel. Flat, it can prevent your product from becoming too crowded in an area. If you cannot find any decent qualitative filter, I also recommend that you use a filter paper tray cut from the coffee filter. Just make sure they are the same size or slightly larger than the discs you made earlier.

Finally, I recommend using an aspirator on the faucet to create a vacuum. I believe [DdD] mentioned it before, although I am not sure what he is talking about (the getter depends on the Venturi effect). I think they are cheap (at least plastic), although you can easily make one yourself out of parts at the hardware store. These will create a large vacuum, if you are worried about wasting water, you can recycle it at any time. Wash some dishes or other things while filtering :)

Very good Buchner funnel/flask

The only problem I see is that if you want to keep the retentate instead of the filtrate, and it is critical to dry for more than 5 minutes under the regular vacuum setting, you will get tired of pumping and may not work as if you have a real vacuum

In the past, most university laboratories had a permanent glassblower to make anything that could not be bought cheaply. I heard that they all disappeared.

If you need a vacuum, obviously all you need to do is tie a helium balloon to a very, very long hose and let it float to the edge of space. Therefore, you will get a vacuum at the other end of the hose...

...Well, at least I'm pretty sure Wyle E. Coyote will do that.

(Disclaimer: Yes, I know this concept has been broken in at least a dozen ways-why is it so serious...?)

It seems to be a good variant of Aeropress for making top coffee!

I think he will polish the cit of the glass tube with a burner. I seem to remember that we did this in school. Maybe I missed the check in the video I wish to see him remove the tire pump. There is no doubt that the book "Scientific American" is somewhere on the Internet, and it seems that some of the material in this book can be placed on the "Scientific American" CDROM. The book is described as in good condition and can be as low as $28. This http://www.noah.org/science/x-ray/stong/ is attributed to this book.

Working for a "pharmaceutical industry supplier" company, we still sell some of these systems. They are decades old, but are very useful when you need to filter water samples to assess microbial charge in the field. They do not require electricity, and if used with glass or stainless steel funnels, they can be "sterilized" with a flame and are very impact resistant. We might even have a small incubator that can run on car batteries somewhere in the old catalog...

In my personal museum there is still a [Gorgeous] stainless steel syringe from 1979. It has a "T" connection at its end. It sucks liquid at one end and blows air at the other end, eliminating the need for a Buchner flask.

One thing worth considering is that the Buchner flask (is it?) is made of thicker glass than a regular old Erlenmeyer flask. It's a bit like a champagne bottle is thicker than a still bottle.

Obviously [Andrey Mikhalchuk] considered that his bicycle pump would not be a problem, but will it survive the vacuum pump? I am considering recycling pump/compressor components from old refrigerators or freezers.

I realize that the filter must be severely clogged, and anyone who does this kind of thing should wear safety equipment and pay attention, but in my experience, explosive glassware is very similar to explosive glassware, and not all solvents are benign .

You can find American science books on QuickShare. Not suitable for computer reading, but 605 pages require a lot of printing. You must rotate some page images to read them on the computer. http://preview.tinyurl.com/3g67uwx

Or a long http://rs420cg.rapidshare.com/cgi-bin/rsapi.cgi?sub=download&editparentlocation=0&bin=1&fileid=73186967&filename=Amateur_scientist_1960.rar&dlauth=9195AD8D44D66A782C949C8FA65CE1C046F0563BA0EE91ABD094B1DE3C9C37342760A473D6427B615B32C280D1471E269F54526D6BA57A85E213824A0B7F27A76298CA8487D3B47E2FB5C772B13F5E8F52F9CE65D5088BC2F988BA187A48DCB3E5D3BF59DAE87C55B6E10C356548C984#!download|420l34|73186967|Amateur_scientist_1960.rar|20299

Or, if you have some spare accessories and air compressors, you can create a vacuum without water, without having to use a bicycle pump, or worry about damaging your Shop Vac.

I like the DIY aspect, but you must have a cost/benefit tag. For example, you can buy Buchner flasks, Guk crucibles, and corks for less than $20. IMO is not worth it, but it is still neat to see people using their brains.

Pete: Can you send a link to the $20 package? Before building my own, I was looking for one, but the only one I found was a $70 (including pump) shipped from eBay. However, this setting can be passed through – jam jar: free – plastic water bottle (for funnel): free – I found out that they use beautiful plastic tubes as part of the party city helium balloon rack: free – bicycle pump: $8 (get me From Target)-the filter is a cotton pan or coffee filter (the latter is actually better because they don't shed lint) or paper towels-basically free

Therefore, the total cost of this setup is as low as $8 (for the pump). I only used Erlenmeyer flasks, rubber stoppers and glass tubes because I have them, all of which are replaceable (I added a note about this in the construction blog).

@Aundrey: http://www.agile-fx.com/servlet/the-1933/Flask,-Filtering,-Light-Duty,/Detail

Add http://www.novatech-usa.com/Products/Laboratory-Porcelain/PBF070

Add http://secure.sciencecompany.com/Rubber-Gasket-or-Vacuum-Filter-Aid-P16545.aspx

It looks like this place http://www.amazon.com/Filtration-70mm-Buchner-Funnel-Flask/dp/B0018RUCDY sells all three for $18.95.

It is true that shipping is not free.

However, I am not suggesting that you go out and buy these things. I just want to make it clear that everyone has a point of view, that is, manufacturing your own equipment is either too much work or too expensive to be worthwhile. About $20 seems to be a small investment in laboratory equipment. Who here would spend the same $20 to buy a "build your own LED light" kit? I bet there is no one here.

Pete: Thanks for the link! The shipping fee without the pump is $28, which is still a good price, better than what I found myself.

I also agree with you. In fact, my idea when I made the video was to talk about different ways to speed up filtering, not to build laboratory equipment. Unbelievable, but many people don’t know about vacuum filtration :)

Just what I needed to make almond milk! ! ! !

UNESCO or UNICEF once had a book for science teachers, which explained how to make scientific equipment when teaching in underdeveloped countries. I gave mine to a friend from the Peace Corps and have been looking for alternatives ever since. Are you familiar with such resources? If so, please email me: irenebaron@irenebaron.com Thank you. http://www.irenebaron.com

For vacuum, I imagine a plastic bottle filled with water, with a pipe (initially clamped) at the bottom, suspended in the bucket, making sure that the end of the pipe is in the water to prevent bubbles from rising into the pipe. From the cap, another tube to the flask. Big bottle, big vacuum, small bottle and small vacuum...

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