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.
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How does pH affect an extraction problem
I am not sure how to understand when pH will affect a given problem regarding extraction. For example, in a problem given that K$_D$ of the reaction is $1.86$ I am asked to calculate:
(a) How much ...
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Selective Removal of Sodium Acetate
I am currently working on an extraction and synthesis of sodium salicyate from acetylsalicylic acid and sodium hydroxide. After doing a liquid-liquid extraction from DCM, using a sodium hydroxide ...
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How to remove graphite substrate of boron carbide coating?
I have a boron carbide coating (the thickness is either 90 microns or 220 microns) on a graphite substrate (the thickness is 0.5 inch - about 13 mm, the other dimensions are 2x2 inch$^2$ - about 5x5 ...
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Cannabigerolic acid (CBGA) and cannabidiolic acid (CBDA): Solubility in ethanol
How much CBGA and CBDA can be dissolved in a given amount of ethanol at room temperature? I did a bit of research but could not find any source on solubility of these substances in ethanol.
For ...
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What are the hydrodynamics behind a Soxhlet extractor?
So I'm trying to wrap my head around the physics of how a Soxhlet extractor works, not the chemical, solvent and chemical components part, but rather the physical, hydrodynamic, siphoning part : why ...
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BTX nitration work-up
I'm trying to understand washing step in a btx nitration process. In all these processes the work-up streams are very similar. The reaction mixture passes from the nitrator to a separator or ...
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Natural Sources for S-(-)-Limonene?
I'm interested in developing an undergrad organic lab that delves deeper into distillation/extraction, optical rotation and enantiomers. Our lab currently does a steam distillation extracting R-(+)-...
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Extraction of copper from chalcopyrite
During the extraction of copper from chalcopyrite ore, the ore ($\ce{Cu2S.Fe2S3}$) is heated to form $\ce{Cu2S}$ and $\ce{FeS}$. Then during smelting it reacts with $\ce{O2}$ to form $\ce{Cu2O}$.
Then ...
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Can I dissolve IBA from talc powder?
My container of in total 25 grams of rooting powder contains 2.5 mg IBA (Indole-3-butyric acid), which is mixed with talc powder and a tiny bit of chromium(III)oxide. I know talc is not soluble in ...
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Why is oil solubility improved in solvents at higher temperatures?
This is in the case of extracting plant oil using a solvent extraction method for the purposes of biodiesel production.
In a paper, it is stated that increased oil yield may be due to the 'increase in ...
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How do you achieve phase separation of a methanol / chloroform solution?
If I'm washing a methanol solution with chloroform, can I just add water in a 1:1 mixture with the methanol and expect it to break? Do I need to do anything else to cause the aqueous phase to separate ...
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In solvent extraction from plant cells, what is the static organic solvent film formed?
I am researching the mechanisms behind solvent extraction of oil from microalgal cells, and it is stated in one paper that in the process of transferring the lipid out of the cell, the solvent-lipid ...
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Looking for caffeine partition coefficients
As part of a project, I'm looking to carry out a liquid-liquid extraction of caffeine from an aqueous phase to an organic phase, using dichloromethane or ethyl acetate.
So I'm looking for the ...
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How to selectively adsorb caffeine on activated carbon filter?
As part of a project on decaffeination methods, I'm looking to see how activated carbon filters can selectively adsorb caffeine in tea and coffee solutions, and avoid adsorbing other taste-giving ...
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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 ...
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