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Good filter aid?

Ananda

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What would be a good filter aid to use for filtering the acidic solution of extraction? (to pull particulates out of the solution, while providing a quick-flowing filtration)
Thanks all
 
Try letting the solution sit in the refrigerator overnight. This causes all the particles to settle to the bottom into a sludge, making the water filtration through filter paper soooooo much easier if you do it carefully without disturbing the sludge.
 
Trickster said:
I've noticed that the final product quality depends on how well the acidic solution is filtered prior to basification.

justine said:
I agree, I always decant and pour rather than filter and it works great :)

It does, indeed, although it takes ~12 hours for the solution to clear and settle completely.

gibran2 said:
Powdered MHRB settles very quickly. This is a nice mess-free way to do it!

I experimented a few times by decanting the solution after an hour first and leaving it to settle for another 8 hours. Always there was more sediment, almost as much as after the first decanting, only finer.

If I am in a hurry I use vacuum filtering. What works for me, is progressive filtering. First I use a cotton ball, then a coffee filter and then a couple of lab filter discs of varying density. With some experience it takes ~30 min to filter 0.5l of acidic solution to complete clarity.

mataylor said:
Laboratory vacuum pumps are crazy expensive

A basic water aspirator is sufficient and it costs a few dozen dollars only.

From this thread.
 
T-shirt- no. Decanting-no. Cotton balls- no. Filter discs of any grade-no.
Would Celite be a good choice for the acidic solution?
 
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