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.
199
questions
0
votes
0
answers
30
views
How does a conc. electrolyte solution extract water from a organic phase like diethyl ether or ethyl acetate?
In organic chemistry, often, during the last steps of a workup we use concentrated brine solution (NaCl) to "extract" the water from the organic layer, especially when we have an organic ...
- 51
3
votes
0
answers
47
views
TsOH and 5% NaHCO3 Interaction: Unexpected Dark Green Color
Here's the brief:
I synthesized alkyl gallates (ethyl gallate, butyl gallate, and amyl gallate) using Fischer esterification.
I used TsOH instead of concentrated H2SO4 as the catalyst.
After ...
- 155
1
vote
0
answers
68
views
Can I make an alcohol-based stain from a pigment with an alkaline extraction process?
I'm in a situation where I don't really even know enough to know if what I want makes sense or has the kinds of problems that I think it might have, but here's the situation:
I would like to make a ...
- 21
0
votes
1
answer
86
views
How feasible is it to separate acetone, butanol, and ethanol (and water) via simple distillation?
I have no experience distilling, though I understand the basics about it. When two liquids with different boiling points are mixed, you can sometimes separate them by boiling away one of the liquids, ...
- 109
-2
votes
2
answers
67
views
Liquid-liquid extraction of sorbicillinol in water with ethyl acetate
My solution consisted of sorbicillinol and water, sorbicillinol being a polar substance. I wanted to isolate sorbicillinol from water using liquid-liquid extraction.
For my solvent I used ethyl ...
6
votes
0
answers
163
views
Which xylenes, if any, are immiscible with DMSO?
"Xylene" is reported to be immiscible with dimethyl sulfoxide (DMSO), according to a few solvent miscibility tables found online (chart 1, chart 2, chart 3). I have tried to locate some ...
- 782
2
votes
0
answers
107
views
Reduction of gingerol content in ginger using kitchen equipment
The single topic that this question focuses on is - how to remove gingerol and only gingerol from a piece of ginger in a manner that it remains safe to eat using equipment found in a well stocked ...
- 129
0
votes
1
answer
532
views
Decarboxylation of THCA in cannabis after plant material is mixed with ethanol [closed]
When making a tincture of cannabis, an early step is decarboxylation by roasting cannabis flowers at low temperatures (such as 230F for 30 minutes). My question is, how can one decarboxylate cannabis ...
- 111
1
vote
0
answers
68
views
Chemistry of a proposed Capsaicin extract [closed]
Background:
I’d like to make an extract of capsaicin using the following ingredients: Capsicum powder, Fractionated coconut MCT oil, apple cider vinegar, and saline. The idea is for the capsaicin to ...
- 11
3
votes
0
answers
454
views
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 ...
- 81
1
vote
0
answers
69
views
How to theoretically determine if a hydrate of a salt precipitates out of solution
In a solid-liquid extraction simulation process, there are multiple salts that precipitate in the solution. But how do I determine if these salts are hydrates or not? To give an example:
$$\ce{Ca3(PO4)...
-2
votes
2
answers
282
views
What is the reason for extracting copper from copper pyrites and not iron?
Why can copper be extracted from copper pyrites ($\ce{CuFeS2}$) but not iron? Is there some intuitive logic behind it?
2
votes
0
answers
65
views
What chemical mechanisms or parameters altered during the usage of buffered extractant for leachability of a soil or sediment?
Toxicity characteristic leaching procedure (TCLP) is an extraction method to simulate a soil or sediment leaching. The method employed two extraction fluids - one is a buffered
solution of acetic acid ...
- 639
-2
votes
1
answer
108
views
Performing the mean and standard deviation for a extraction based on averaged content determination
Is it okay to perform the mean and standard deviation for a triplicate extraction based on averaged values of content determination?
I performed an extraction in triplicate. Each one of the ...
- 43
3
votes
2
answers
121
views
Can I expect the same (or very close) peak areas from herbal extracts prepared with the same plant/solvent ratio?
I prepared an extract by using 100 mg of plant and 2 mL of ethanol, filtered and injected 20 μl into the HPLC system equipped with Waters® XSelect (150 mm × 4.6 mm, 5 μm) column. If I prepare an ...
- 43