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Questions tagged [extraction]

For questions regarding the separation process consisting in the separation of a substance from a matrix. This tag can be used for generic extraction of elements from ore or more specific types of extraction such as: liquid-liquid extraction, and solid phase extraction.

197 questions
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Condenser shooting out hexane in a soxhlet extraction

Im running a soxhlet extraction using hexane as the solvent. Once the hexane has filled up the soxhlet, a considerable amount of hexane will come out on top of the condenser. Is this an issue with pressure or defects in the glasses?
prpper12
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4
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1 answer

Rule of Thumb for separatory funnel volumes

Is there a general rule of thumb in terms of how one chooses the volume of separatory funnel used for an extraction? It's my understanding that it is the amount of product that determines this as opposed to the volume of the solvent it is present…
David Reed
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Will piperine endure heating for several days of soxhlet extractions?

I'm extracting piperine for use with curcuminoid supplements using a soxhlet apparatus and 91% isopropyl alcohol. My first extraction is right about done but I still need to do two more because of the limited size of my soxhlet. My question is,…
user62840
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Why would methanol and water be used for an aqueous layer in a separating funnel compared to just water?

I have a protocol for separating an inorganic component from an organic mixture, which asks for the mixture to be suspended in methanol and water and then doing an extraction with hexane. I understand that this allows separation of polar components…
k--
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Why does emulsions hinder the full extraction of a substance?

I've learend that in processing liquid-liquid extractions, emulsions can appear between two immiscible solvents. For exmaple, to extract caffeine from green tea leaves; The caffeine in water can be moved to ethyl acetate with liquid-liquid…
JERry
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2
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2 answers

How does one separate ethanol from acetic acid using aqueous extraction?

Would you add in $\ce{NaOH}$, deprotonating the acid, and then wash the mixture in water, thereby removing the $\ce{Na^+}$ and $\ce{CH3O^-}$ ions in an aqueous layer? But then wouldn't the ethanol be dissolved in the water as well, as it is polar?…
user32134
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Separating plant extract from ethanol solution

I have to do an experiment which involves getting the extract of certain leaves. I had decided to macerate it in ethanol (70%) solution and then to evaporate the solvent using water bath/rotary evaporator. Due to the pandemic, I couldn't get access…
ninetysix
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2 answers

Can caffeine be separated from coffee?

Is there a way to extract caffeine from coffee completely?
Biju
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1
vote
2 answers

lindane extraction from aqueous solution using hexane

I am studying the degradation of lindane using iron nanoparticles. I have prepared lindane solution with an acetone and water mixture (1:9 v/v). I tried to extract lindane after reaction with nanoparticles using hexane as a solvent. a viscous third…
ritu
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Extraction of calcium carbonate from liquid

I'm using calcium carbonate ($\ce{CaCO3}$) in apple juice to reduce the acidity of the juice. Once the $\ce{CaCO3}$ reacts with the apple juice and raises the pH, the juice is left cloudy in color BUT has the desired pH of 3.4. I need a way to…
DK4
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Can you extract specific compounds from infused oils?

I heard a discussion when sitting on the train this morning by a couple of cannabis folk on the way into Denver. This is in regards to coconut oil (for baking). For example: if someone extracted THC into coconut oil, is there anyway to then separate…
Frequent Commuter
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What is an effective extraction solvent for removing hydrocarbons from soil (using a soxhlet extractor)?

I am interested in improving the extraction efficiency of hydrocarbons from soil using a soxhlet extractor, and I would like to know what solvents might improve this extraction efficiency, and why. Currently, I am using 1:1 hexane:acetone.
Galen
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Are glycosides more soluble in dichloromethane than in water?

I'm designing an experiment to extract the amygdalin from apricot leaves and kernels. I want to steam the kernels and leaves, grind them, add water and then filter it using a filter paper. Then transfer the solution to a separatory funnel, add…
neveragain
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3,4-Methylenedioxyamphetamine (MDA) basic extraction

At my lab we perform a basic extraction of seized MDA with $\ce{NaOH}$ $\pu{2M}$ prior to GC/MS analysis. $\ce{MDA + NaOH -> MDA- + Na+ + H2O}$. This reaction should favor the products since $\mathrm{p}K_\mathrm{a}$ of MDA is about 10 and…
Luigi
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Effect of coffee brew water concentration on further extraction in immersion brewing

In immersion brewing coffee is extracted with an increasingly saturated solution, as opposed to percolation brewing, where the extraction is performed with a continous supply of fresh water. Because water can only extract a certain amount of…
KaffeeOs
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