Precipitated Carbon: Filtering Carbon with Retention Discs

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In summary, a new member introduced themselves to a board and expressed their enjoyment of reading the content. They then asked for advice on how to clump up a fine precipitate while using vacuum filtration. Another member suggested using a finer fritted disk or a fritted filter funnel with an outer jacket to help with the filtering process.
  • #1
jmnew51
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Hey all, :smile:

I'm new to this board. I really think it's great, and I love to visit whenever I have the time. Mainly to read.

But now I have a question.

I recently did an experiment forming carbon from sugar and conc. H2SO4,
but the precipitate is so fine it emmediately clogs the filter paper. Even when I use a Buchner, with 20-25 uM particle retention disc. I was wondering if there is any way to get the precip to clump up a little, so as to not be so fine and clog the paper, and make the filtering process possible?
Thanx
Jim
 
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  • #2
Are you using vacuum filtration?
 
  • #3
Yes, I use vacuum(up to 20" Hg.), and still the filter paper slugs up so quick because the particles are so fine.
I guess maybe I could just let the precip. settle and decant.
 
  • #4
I thought you don't need to use filter paper when you already have a fritted disk. Well then again your disk is coarse and the pores are big. You may want to try a finer fritted disk for your filtration. A fritted filter funnel with an outer jacket may help crystallize the product as well.
 
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FAQ: Precipitated Carbon: Filtering Carbon with Retention Discs

What is precipitated carbon?

Precipitated carbon is a form of activated carbon that has been treated with chemicals to increase its surface area and enhance its adsorption capabilities. This makes it an effective filtration material for removing impurities from liquids and gases.

How is precipitated carbon made?

Precipitated carbon is made by treating activated carbon with acid, base, or salt solutions, followed by a heating process. This creates pores and channels within the carbon, increasing its surface area and making it more effective at adsorbing impurities.

What are the benefits of using precipitated carbon in filtration?

Precipitated carbon has a larger surface area and higher adsorption capacity compared to regular activated carbon. This makes it more efficient at removing impurities, such as organic compounds, from liquids and gases. It can also be reused multiple times, making it a cost-effective option for filtration.

How does filtering carbon with retention discs work?

Filtering carbon with retention discs involves using a combination of precipitated carbon and a retention disc, which is a porous membrane that helps to hold the carbon in place. The liquid or gas is passed through the carbon and the retention disc, allowing the carbon to adsorb impurities while the disc prevents the carbon from escaping.

What types of impurities can precipitated carbon remove?

Precipitated carbon is effective at removing a wide range of impurities, including organic compounds, chlorine, pesticides, and heavy metals. It is commonly used in water treatment, food and beverage processing, and air purification to remove contaminants and improve overall quality.

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