As a chemist (60 years old), I would advise buying some cheap whitish paper coffee filters (two to three hundred dollars a pack). Put the coffee filter in first, wet it down and then put in the better filter on top of it. That way the main filter does not get damaged by the big holes. Alternatively there are filtering pads of metal, plastic or even ceramic that can be bought to put over the holes. Another suggestion is to use a valve to control the vacuum levels. We normally did this unless we were using a cheap rubber diaphragm pump that could only pull down to 20 inches of vaccuum. The pump would run full blast, the valve was between the pump and the filter flask and controlled how much air would be bled into the line to keep the vacuum level controlled. We would start with the valve fully open (air from outside the filtration setup going to the vacuum pump) and the slowly close it until we reached the desired vacuum/filtering rate. Also, even with our filter flasks in the hood with the sash down, we implemented putting all flasks in rubber carry totes or metal/plastc cans to to the top of the glass. That way if the flask broke, little glass flew and the solution being filtered was much easier to clean up.
I use two regular filter papers because I have them and since putting two in the funnel I’ve never experienced a filter failure. I have a vacuum switch in the circuit to limit vacuum to 7 inches, restart at 5 inches. Pulling a full vacuum would cause the filter papers to fail. I’ve pulled 29 inches of vacuum on every one of my filter flasks and never once experienced a failure of the glass.
Hey Chief! it would be so awesome. If you could do a video. Outlining the supplies needed to refine gold and set up a silver cell! I get so nervous just handling my scraps. Man what I would do to be your apprentice. You are such an inspiration!
@@sreetips you are welcome sir! please consider it. if you do. I will suck it up and make a video. Following your guide. With your permission of course. Because of your videos I want to start a business. You truly have changed my life for the better.
That is a great tip there I guess I haven't really noticed the difference in holes in the funnels but I see what you are talking about. Thanks Sreetips.
Anyone else hitting the thumbs up and getting no change in the count or the thumb not blue after you like it? Thank you sir for your much appreciated knowledge.
For the viewers who might not know -- nearly all chemists pronounce this like "bee-you-k-ner" and not "buck-ner". It's named after the German industrial chemist Ernst Büchner who patented the design over a century ago.
Thanks for the information about the funnels I could use more information home complete description of each acid you use. For instance the acid you use to test for lead in your aqua regia. And the test acid to see if there's gold in solution or not. Thanks for all your videos great job the information is very important to me thanks Mark
There's always one to give a thumbs down.. Sreetips you rock man. I love watching your videos. Love the longer vids especially. Much love from Ireland pal.
@@sreetips i look forward to seeing it already. Quick question.. Would nitric acid dissolve rock? Or if not what would? I have a lot of rock samples of all types that have trace amounts of gold and dont possess a rock crusher.. Any tips sree-tips would be greatly appreciated..
I’ve never worked with gold from rock, only gold that’s already above ground. But I do know, from study, that gold in quartz is common. And I believe that hydrofluoric acid will dissolve the quartz. But I don’t know if it will dissolve rock. Good luck
You stated your favorite size was the 70 centimeter. thats over 20 inches. I guess you meant 70 mm. sorry to be correcting you. I am just researching the size I should buy. thanks for the video, I think I will look for those with the small holes for sure.
Always enjoy you videos. The info you provide has gotten me interested in trying my hand at refining, almost ready to do my first batch of GF jewelry. I have to say if this all works out and I enjoy it like I am so far I will have you to thank...
Good info. I’m about to get started acquiring what I will need, and never would have realized that. I’d be very interested to hear about if you have any preferences in the types of beakers and flasks.
Love the vids,and i saw once,in a video that you told what filterpaper you used. But can't remember which one. Question..... What filterpaper do you use for filtering aqua regia gold solution. And what filter paper do you use for the precipitated gold
1st off Excellent Channel!! I wish i would have found you years ago when i failed at this the 1st time...you've answered so many of my questions. Now have you ever used Boro fritted glass??
with the ceramic one which is more prone to fail, I would bet it would be a pain to clean out the residue because you cant access it, unlike the plastic one
I’ve taken a test tube brush and bent to fit so I could get it up the stem then wiggle it around with some soapy water to clean. But I agree, no way to get it real clean with the solid ceramic
I get mine on eBay. Once you get them wet they pretty much lose all strength. Use Buchner with small holes (large holes fail easily) and keep vacuum low when filtering.
Also does the tip of the bottom have to be below the vacuum port?? Won't it pull liquid into the tube if not? I have a very cheap setup I found somewhere and not sure im going to use it...keep stackin!
In your waste bucket with all the copper cementing out on the ironbars will you start collecting that and smelt that when you get your big burner going to be even more self sufficient? maybe not the right video to ask it on but i just been thinking about it since i seen your waste buckets more and more with the last 2 silver videos. keep up the videos its always brightens the day in a dark cold sweden :)
@@sreetips guess its not worth giving it to some local refiner either but i understand that its not worth the time or the effort in the long run. Will you be doing a build video on the new furnace by the way?
What filter paper do you recommend for gravity feed. I know the Whitman 42 is for vacuum I think. Just wondering for gravity because i am just starting
Umm... That guy who invented those funnels was a German fellow named... Büchner (surprise, surprise). Ernst Büchner, to be precise, and he did it in 1888 - but I digress here. However, "Büchner" is not pronounced [bakner] but more like [biu:∫ner] - ü, or "u umlaut" ("silenced" or "flat" U) is pronounced like a mix between "i" (as in "bit") and "u" (as in "surprise"). And German "ch" (and "sch") sounds much rather like English "sh". I know, this is America and “it is a different country, they do things (and speak) differently there” - still, it sounds kinda weird. After all it is "a degree of [selsjas]", not [kelsjas], innit? So just say "Büchner", just say that! : )
@@sreetips Thank you for your kind permission : ) Yes, I have noticed "the way you say it", and I apologize if it bothers you that it bothers me when I hear "bakner". But then, I think, you'd instantly correct anyone mispronouncing YOUR name, and probably found the reply "I say it the way I say it" tad... umm... uncouth. Speaking of names - English pronunciation of "Jesus" also falls way off original Yehoshua... but AFAIK no scientific apparatus, tool or unit is named after Him. Also, there wasn't much "analysis" involved - just "off the hand" remark, as I do speak a little German, and in that secondary vocational chemical school I have attended in my young days that funnel was called "Büchner funnel". Call it a "knee-jerk response", and I promise I'll do my best not to do it again. Anyway, it wasn't meant to be "you [whatever] Americans don't know/ can't even ..." - no, not at all - all I meant was "well, FYI, this name comes from the surname of this guy, and it is pronounced so-and-so". (Well, I guess that"smiley face" at the end wasn't smiley enough... Sorry, next time I'll make it more smiley-ish. And that "this is America and..." part was merely a paraphrased quotation from "The Go-Between" book by L.P. Heartly.) Cheers! PS: That jacketed funnels are also (primarily?) used to keep filtered liquid from solidifying (in case of substances with melting point above room temperature), or lowering their viscosity - in which case hot water or steam is used.
@Eric Konschuh Thank you for your feedback. Somehow, after reading your post, that popular adage about kettle and pot came to my mind, but I digress here. Yes, I'd agree that public education in America sucks, and produces lot of people who have difficulty reading (not to mention "understanding") anything longer than a "tweet", and sentences that utilise words other than "like, literally" and emoji(s). So, yes, I sympathise with you on that. And I'm kinda lost on those "little fuckers" - could you please elaborate a bit? Means who? Your fellow Americans? 'Cause I can hardly imagine any French, German or Spaniard making fun of American trying to pronounce their native words properly... Am I missing something here? BTW, you can take a peek at certain "German Girl in America", who "berates" Americans for mispronouncing some German brand names ("15 German brands YOU pronounce WRONG!"): ua-cam.com/video/PGx5lEDLC4Q/v-deo.html And that _"instead so all at once it makes perfect sense to change the pronunciation in order to effect the first and most primitive rule of language"_ gobbledygook is a real poser for me - can't make heads or tails out of it, sorry. Now, back to the issue. The core of this problem, methinks, is the utterly weird way English (and, to significant extent, French as well) differs in its spelling and pronunciation. AFAIR it was Mark Twain who quipped "how do you spell 'fish'? - oh, that simple: G-H-O-T-I". ("GH" as in "tough", "O" as in "women", "TI" as in "motion". Plain, simple and logical, eh? Or "certainly Celts celebrated their cerium ceramic cups" - any logic to "k/c" pronunciation? I do not see it, but maybe I'm not smart enough? Hmm... Could be, could be...) On the other hand, one could learn how to read (= properly pronounce) German, Spanish or Polish words under one hour - I learned German pronunciation under twenty minutes when I was 16 yrs old, long BEFORE I learned any German. Brother of my friend, who studied in France, once tried to teach his French mate how to pronounce Polish words correctly - and within an hour that French fellow could read properly (even if tad imperfectly) Polish text - and without understanding a iota of it. On the other hand, some linguist once observed (sorry, can't remember who and when, it was his observation that stuck with me) that English spelling and pronunciation are so "out of sync" that one could actually consider English written words "ideograms". Something to ponder, innit? Anyway, to wrap up that way too long rant of mine - I believe proper pronunciation of foreign words - AND NAMES - is just "the right thing to do". Failing that you'll be prone to draw some "flak" and risk being ridiculed and/ or misunderstood. But I'm not a Decalogue, and thus I do not require everyone to happily and eagerly agree with me, 100%. Cheers! PS: And, oh, BTW: there isn't any universal "European language", so there are not "European WORDS" - I guess you meant "words of/ from various 'European' languages".
I am chemist for 30+ years and i do not agree that smaller holes are better in all cases. It depends how coarse is solid phase, viscosity of liquid ect ect. When you filter Ni(OH)2 for example you wold better like that with bigger holes...
As a chemist (60 years old), I would advise buying some cheap whitish paper coffee filters (two to three hundred dollars a pack). Put the coffee filter in first, wet it down and then put in the better filter on top of it. That way the main filter does not get damaged by the big holes. Alternatively there are filtering pads of metal, plastic or even ceramic that can be bought to put over the holes. Another suggestion is to use a valve to control the vacuum levels. We normally did this unless we were using a cheap rubber diaphragm pump that could only pull down to 20 inches of vaccuum. The pump would run full blast, the valve was between the pump and the filter flask and controlled how much air would be bled into the line to keep the vacuum level controlled. We would start with the valve fully open (air from outside the filtration setup going to the vacuum pump) and the slowly close it until we reached the desired vacuum/filtering rate. Also, even with our filter flasks in the hood with the sash down, we implemented putting all flasks in rubber carry totes or metal/plastc cans to to the top of the glass. That way if the flask broke, little glass flew and the solution being filtered was much easier to clean up.
I use two regular filter papers because I have them and since putting two in the funnel I’ve never experienced a filter failure. I have a vacuum switch in the circuit to limit vacuum to 7 inches, restart at 5 inches. Pulling a full vacuum would cause the filter papers to fail. I’ve pulled 29 inches of vacuum on every one of my filter flasks and never once experienced a failure of the glass.
finally somebody going through different types of funnel hopefully all the rest of the glassware and beakers. :-)
Hey Chief! it would be so awesome. If you could do a video. Outlining the supplies needed to refine gold and set up a silver cell! I get so nervous just handling my scraps. Man what I would do to be your apprentice. You are such an inspiration!
Thank you
@@sreetips you are welcome sir! please consider it. if you do. I will suck it up and make a video. Following your guide. With your permission of course. Because of your videos I want to start a business. You truly have changed my life for the better.
No way i would have known to look for that, really valuable piece of info there, thanks!
That is a great tip there I guess I haven't really noticed the difference in holes in the funnels but I see what you are talking about. Thanks Sreetips.
Anyone else hitting the thumbs up and getting no change in the count or the thumb not blue after you like it?
Thank you sir for your much appreciated knowledge.
For the viewers who might not know -- nearly all chemists pronounce this like "bee-you-k-ner" and not "buck-ner". It's named after the German industrial chemist Ernst Büchner who patented the design over a century ago.
Thank you kadriver! amazing all the experience you share. A video about filter pappers would be nice :)
Nice funnels! 😉
Some info to absorb! Thank you!
Have a Great Day My Friend!!!
Thank you for this video I have the same Buckner funnels I didn't even realize about the hose makes a lot of sense once more again thank you so much
Wow ! I never knew a jacketed Buchner funnel even existed.
Nice one !
Very interesting! I never realized the different types.
Thanks for the information about the funnels
I could use more information home complete description of each acid you use. For instance the acid you use to test for lead in your aqua regia. And the test acid to see if there's gold in solution or not.
Thanks for all your videos great job the information is very important to me thanks Mark
There's always one to give a thumbs down.. Sreetips you rock man. I love watching your videos. Love the longer vids especially. Much love from Ireland pal.
I’m planning a longer video soon. Going to refine some scrap platinum jewelry items
@@sreetips i look forward to seeing it already. Quick question.. Would nitric acid dissolve rock? Or if not what would? I have a lot of rock samples of all types that have trace amounts of gold and dont possess a rock crusher.. Any tips sree-tips would be greatly appreciated..
I’ve never worked with gold from rock, only gold that’s already above ground. But I do know, from study, that gold in quartz is common. And I believe that hydrofluoric acid will dissolve the quartz. But I don’t know if it will dissolve rock. Good luck
@@sreetips thank you so much for your help. Stay safe and well 👍
You stated your favorite size was the 70 centimeter. thats over 20 inches. I guess you meant 70 mm. sorry to be correcting you. I am just researching the size I should buy. thanks for the video, I think I will look for those with the small holes for sure.
Always enjoy you videos. The info you provide has gotten me interested in trying my hand at refining, almost ready to do my first batch of GF jewelry. I have to say if this all works out and I enjoy it like I am so far I will have you to thank...
Bravo
Don’t forget to incinerated the foils before dissolving them in aqua regia!
Who do you buy you Nitric Acod through
Great tip thank you who would’ve thought
Nice thumbs up
Good info. I’m about to get started acquiring what I will need, and never would have realized that. I’d be very interested to hear about if you have any preferences in the types of beakers and flasks.
Thank you so much for the video, it was truely helpful,
Love the vids,and i saw once,in a video that you told what filterpaper you used.
But can't remember which one.
Question.....
What filterpaper do you use for filtering aqua regia gold solution.
And what filter paper do you use for the precipitated gold
1st off Excellent Channel!! I wish i would have found you years ago when i failed at this the 1st time...you've answered so many of my questions. Now have you ever used Boro fritted glass??
I have not
Good lesson, thanks.
sreetips meant to say 70 mm ...
I wish that you would do a Refining set up from start to finish! I am in the Philippines and WOULD LOVE to start refining.
Check his other videos!
with the ceramic one which is more prone to fail, I would bet it would be a pain to clean out the residue because you cant access it, unlike the plastic one
I’ve taken a test tube brush and bent to fit so I could get it up the stem then wiggle it around with some soapy water to clean. But I agree, no way to get it real clean with the solid ceramic
Dang , now I have to go check mine ;)
Only use a couple time , just getting setup .
Thanks agian
Good info, how about filter paper numbers and the micron size that goes with it. What is the best micron for filtering silver cement?
My filters are #1 fast flow, #2 medium flow, #3 slow flow. No micron size is given.
Where do you get your filter paper? I’ve been getting it off Amazon and eBay and I’ve gotten some batches that we’re just really weak.
I get mine on eBay. Once you get them wet they pretty much lose all strength. Use Buchner with small holes (large holes fail easily) and keep vacuum low when filtering.
That’s the size of the biggest one? The one you grabbed the first time and opens up for the filter?
12.5cm
Also does the tip of the bottom have to be below the vacuum port?? Won't it pull liquid into the tube if not? I have a very cheap setup I found somewhere and not sure im going to use it...keep stackin!
Yes, you want the Otto tip of the fuennel below the vacuum port.
@@sreetips thanks bro.....some funnels have really short spouts that don't reach below the Vac port...cheap china
Do you have a video on a list of equipment you used
I could watch it and write the list as the video progresses.
In your waste bucket with all the copper cementing out on the ironbars will you start collecting that and smelt that when you get your big burner going to be even more self sufficient? maybe not the right video to ask it on but i just been thinking about it since i seen your waste buckets more and more with the last 2 silver videos. keep up the videos its always brightens the day in a dark cold sweden :)
I simply don’t have the time to work with the cemented copper.
@@sreetips guess its not worth giving it to some local refiner either but i understand that its not worth the time or the effort in the long run. Will you be doing a build video on the new furnace by the way?
I plan on building one
What filter paper do you recommend for gravity feed. I know the Whitman 42 is for vacuum I think. Just wondering for gravity because i am just starting
Whatman number one, two or three will work for gravity flow
@@sreetips thank you sir great channel!
What brand has the smaller holes?
They didn’t have brand names. Just make sure the pictures in the listing are the actual funnels that you’ll receive.
Umm... That guy who invented those funnels was a German fellow named... Büchner (surprise, surprise). Ernst Büchner, to be precise, and he did it in 1888 - but I digress here.
However, "Büchner" is not pronounced [bakner] but more like [biu:∫ner] - ü, or "u umlaut" ("silenced" or "flat" U) is pronounced like a mix between "i" (as in "bit") and "u" (as in "surprise"). And German "ch" (and "sch") sounds much rather like English "sh".
I know, this is America and “it is a different country, they do things (and speak) differently there” - still, it sounds kinda weird. After all it is "a degree of [selsjas]", not [kelsjas], innit?
So just say "Büchner", just say that!
: )
Thank for that fine forensic analysis. Buck-ner is the way I say it. But you can say it any way that you like.
@@sreetips Thank you for your kind permission : )
Yes, I have noticed "the way you say it", and I apologize if it bothers you that it bothers me when I hear "bakner".
But then, I think, you'd instantly correct anyone mispronouncing YOUR name, and probably found the reply "I say it the way I say it" tad... umm... uncouth.
Speaking of names - English pronunciation of "Jesus" also falls way off original Yehoshua... but AFAIK no scientific apparatus, tool or unit is named after Him.
Also, there wasn't much "analysis" involved - just "off the hand" remark, as I do speak a little German, and in that secondary vocational chemical school I have attended in my young days that funnel was called "Büchner funnel".
Call it a "knee-jerk response", and I promise I'll do my best not to do it again. Anyway, it wasn't meant to be "you [whatever] Americans don't know/ can't even ..." - no, not at all - all I meant was "well, FYI, this name comes from the surname of this guy, and it is pronounced so-and-so".
(Well, I guess that"smiley face" at the end wasn't smiley enough... Sorry, next time I'll make it more smiley-ish. And that "this is America and..." part was merely a paraphrased quotation from "The Go-Between" book by L.P. Heartly.)
Cheers!
PS: That jacketed funnels are also (primarily?) used to keep filtered liquid from solidifying (in case of substances with melting point above room temperature), or lowering their viscosity - in which case hot water or steam is used.
@Eric Konschuh Thank you for your feedback. Somehow, after reading your post, that popular adage about kettle and pot came to my mind, but I digress here.
Yes, I'd agree that public education in America sucks, and produces lot of people who have difficulty reading (not to mention "understanding") anything longer than a "tweet", and sentences that utilise words other than "like, literally" and emoji(s). So, yes, I sympathise with you on that.
And I'm kinda lost on those "little fuckers" - could you please elaborate a bit? Means who? Your fellow Americans? 'Cause I can hardly imagine any French, German or Spaniard making fun of American trying to pronounce their native words properly... Am I missing something here?
BTW, you can take a peek at certain "German Girl in America", who "berates" Americans for mispronouncing some German brand names ("15 German brands YOU pronounce WRONG!"): ua-cam.com/video/PGx5lEDLC4Q/v-deo.html
And that _"instead so all at once it makes perfect sense to change the pronunciation in order to effect the first and most primitive rule of language"_ gobbledygook is a real poser for me - can't make heads or tails out of it, sorry.
Now, back to the issue. The core of this problem, methinks, is the utterly weird way English (and, to significant extent, French as well) differs in its spelling and pronunciation. AFAIR it was Mark Twain who quipped "how do you spell 'fish'? - oh, that simple: G-H-O-T-I".
("GH" as in "tough", "O" as in "women", "TI" as in "motion". Plain, simple and logical, eh? Or "certainly Celts celebrated their cerium ceramic cups" - any logic to "k/c" pronunciation? I do not see it, but maybe I'm not smart enough? Hmm... Could be, could be...)
On the other hand, one could learn how to read (= properly pronounce) German, Spanish or Polish words under one hour - I learned German pronunciation under twenty minutes when I was 16 yrs old, long BEFORE I learned any German. Brother of my friend, who studied in France, once tried to teach his French mate how to pronounce Polish words correctly - and within an hour that French fellow could read properly (even if tad imperfectly) Polish text - and without understanding a iota of it.
On the other hand, some linguist once observed (sorry, can't remember who and when, it was his observation that stuck with me) that English spelling and pronunciation are so "out of sync" that one could actually consider English written words "ideograms". Something to ponder, innit?
Anyway, to wrap up that way too long rant of mine - I believe proper pronunciation of foreign words - AND NAMES - is just "the right thing to do". Failing that you'll be prone to draw some "flak" and risk being ridiculed and/ or misunderstood. But I'm not a Decalogue, and thus I do not require everyone to happily and eagerly agree with me, 100%.
Cheers!
PS: And, oh, BTW: there isn't any universal "European language", so there are not "European WORDS" - I guess you meant "words of/ from various 'European' languages".
why you don't talk about the vacuum device ???
I have a video “how to build a reliable vacuum system”
oh and yes I'm getting audio
thank you
I am chemist for 30+ years and i do not agree that smaller holes are better in all cases. It depends how coarse is solid phase, viscosity of liquid ect ect. When you filter Ni(OH)2 for example you wold better like that with bigger holes...
Got it. Thank you. For refining precious metals, the smaller holes are better. This has been my experience
Hi. What wacum pump do you use?
How To Build A Reliable Vacuum Filtration System
@@sreetips thanks. I use the waccum pump off car enginie.
HVAC vacuum pump from harbor freight. Been in service about 9 years
your videos are very professional. I know because I am a chemical analyst.
woah! im first :D love ur videos mann
I am not getting any video with the audio
Fine on mine. Problems with your internet? 🤔
this happens to me sometimes with my smart tv youtube app