Lab has some büchners that have seen better days. We've worked with some silver salts that result in lots of nice grey/black stains on them and have already base bathed them to no avail.
Would a dilute acid bath be advised? I'd assume they cannot handle concentrated acids/aqua regia, but maybe a 5-7% solution of HNO3 and HCl would do the job?
Anyone have any experience in this?
Have a Büchner funnel to filter my winterized ethanol solution, I use grade 3 filters for my first pass, was going to buy some borosilicate glass filter papers as it’s a much smaller micron size then my grade 3 filters.
Here are the filters I’m looking at https://www.amazon.com/Whatman-1810-090-Borosilicate-Treated-Diameter/dp/B00394FBO4/ref=mp_s_a_1_3?ie=UTF8&qid=1531093838&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=borosilicate+filter+90&dpPl=1&dpID=41YKqTWRdiL&ref=plSrch
I noticed they are marketed as acid treated, so do I need to be concerned about these contaminating my ethanol solution? Should I be looking for “binder free” borosilicate glass filter papers?
Being a coffee-loving chemical engineer (are there any other kind?) I've always wanted to build my own brewer. I've recently settled on a Japanese style cold drip design. But I've come across a stumbling block - I'm interested in using a Fritted Buchner Funnel to do the separation rather than filter paper because I'm vain (mostly) and I'd rather not buy filters.
Does anyone have an idea if the oils will adsorb to the pores of the frit and if so, will there be some sort of a "break in/seasoning" period? Also, I'm trying to decide on what pore size to use:
- 16-40 µm
- 40-100 µm
- 160-250 µm I assume all will filter out any noticeable coffee fines, but if anyone has any experience in the matter, advice would be appreciated.
Basically i just want to know if anyone that has used one and if it is more complicated than it seems.
I'm going to be blasting into a measuring cup sitting on some dry ice, then wait about 6 hours for the fats and waxes to coagulate, put into the Büchner funnel to seperate with vac assist (i know to not pull that much butane into my pump) and then pour the contents onto my Ptfe and then purge as normal. ALL OUTSIDE BY THE WAY!
Hi!
Probably I am the one to blame but there is one small detail I do not get! Please help resolve it!
So, after fermentation, the 2 liters of brown liquid with the beads needs to be decanted and the beads filtered through celite.
- a hand pump most certainly NOT going to be enough. Vacuum too weak. 6-12 hours till it is done. It was for me.
If I filter the beads and residue through celite that I Ed up with around 200 ml liquid. Do I have to extract ONLY THAT with DCM? The decanted liquid contains no L-PAC?
So only the beads (I had not much”residue” to talk about, virtually nothing perceptible) goes to the Büchner funnel ? and what makes it through the celite is the only liquid I need to do an extraction on?
All replies are appreciated! Thanks?
Hey boy, are you indicator like phenolphthalein because every time there’s acidic conditions you disappear ?
Being ghosted sucks more than a Büchner funnel.
#mondayscaries
The funeral director was asking us what we think Mum should wear in her casket.
Mum always loved to wear sarongs (fabric wraps that go around the torso and drape downward a bit like a long skirt would), so my uncle suggested that she wear a sarong in there.
The funeral director looked a bit confused, as did some of our family members, to which my uncle added:
"What's sarong with that?"
I started laughing like an idiot. He was proud of it too. The funeral director was rather shocked. We assured her, and our more proper relatives, that Mum would've absolutely loved the joke (which is very true).
His delivery was perfect. I'll never forget the risk he took. We sometimes recall the moment as a way help cushion the blows of the grieving process.
--Edit-- I appreciate the condolences. I'm doing well and the worst is behind me and my family. But thanks :)
--Edit-- Massive thanks for all the awards and kind words. And the puns! Love 'em.
I would have a daughter
But Bill kept the Windows
True story; it even happened last night. My 5-year-old son walks up behind me and out of the blue says, "hey."
I turn to him and say, "yeah, kiddo? What's up?"
He responds, "it's dead grass."
I'm really confused and trying to figure out what's wrong and what he wants from me. "What? There's dead grass? What's wrong with that?"
.
.
.
He says, totally straight-faced, "hay is dead grass," and runs off.
You officially hit rock bottom
And then you will all be sorry.
Now it’s syncing.
He replied, "Well, stop going to those places then!"
I will find you. You have my Word.
She said how do you know he was headed to work?
“thank you for your cervix.”
...sails are going through the roof.
Made me smile
Mods said I'm a cereal reposter...
A taxi
But now I stand corrected.
Wait. Sorry, wrong sub.
Wookie mistake.
Theoretical Fizz-ics
