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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what are the ores A1 and A2?

Question $\ce{A1}$ and $\ce{A2}$ are two ores of metal $\ce{M}$. $\ce{A1}$ on calcination gives a black precipitate, $\ce{CO2}$, and water. On reaction with dilute $\ce{HCl}$ and $\ce{KI}$, $\ce{A1}$ ...
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1answer
29 views

How is food-grade calcium sulfate made?

I'm doing a chemistry project on ionic compounds found on food labels, and I can't find a clear article on how calcium sulfate is made for edible foods. I know it comes from calcium sulfate dihydrate. ...
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12 views

Differences between anionic and cationic surfactant in DNA extraction?

What's the main difference in DNA extraction between using an anionic surfactant (like SDS) or a cationic surfactant (like CTAB)?
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1answer
51 views

Trying to displace iron from ferrous sulphate heptahydrate using aluminium foil but nothing has happened

I started by dissolving the sulphate into water and filtering it as I noticed there was a dirty residue lying at the bottom. (I am using ferrous sulphate that is commonly used in gardening.) I then ...
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2answers
100 views

Liquid-liquid caffeine extraction

I am performing a lab experiment in which I am extracting crude caffeine from different samples of tea. I have read a couple of similar experiments in which methylene chloride has been used to extract ...
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0answers
36 views

Remove aceton from denatured alcohol

I have bought a bottle of denatured alcohol. On the web I've found these solutions typically contain the following: $85\%$ ethanol $10\%$ water $3\%$ methanol $1\%$ aceton $1\%$ pyridine I would ...
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0answers
34 views

Lead oxide(ii) Crt monitor extraction

I have a large crt monitor that, by the weight of the monitor, I estimate to contain over two pounds of lead. I want to know if the lead oxide is a mixture with the glass, or if it is chemically ...
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15 views

How can I isolate glycolic acid from sugarcane juice?

This beginning of a bachelor thesis uses ethylene glycol as a catalyst in the isolation of glycolic acid. I can't find the rest of the article (it ends in the middle of the description) to find out ...
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2answers
76 views

calcium carbonate - CaCO3 - extraction from liquid

I'm using calcium carbonate (CaCO3) in apple juice to reduce the acidity of the juice. Once the CaCO3 reacts with the apple juice and raises the pH, the juice is left cloudy in color BUT has the ...
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0answers
49 views

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 ...
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54 views

What would you recommend to isolate these compounds from cooking oil?

Recycled cooking oil, aka "gutter oil", is a major problem in countries such as China. I am doing some research to see if there's a reliable and quick way to determine if something is gutter oil. I ...
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1answer
60 views

Troubles with cinnemaldehyde extraction - A few general questions

I'm trying to do a cinnemaldehyde extraction. I've tried both a simple and a steam distillation. I'm using the video: [https://www.youtube.com/watch?v=bDoaPIKT_Xg] - as a guide. One of the main ...
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1answer
73 views

Oil-water emulsion doesn't separate

I've steam distilled a couple of different powdered seeds/herbs to obtain the essential oils from them. Somehow some of the extracts won't separate and stay in an emulsion. I've seen that some fixed ...
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1answer
529 views

I am trying to find the solubility of benzoic acid in different solvents to prepare a liquid-liquid extraction

I need to prepare a liquid-liquid extraction using the partition coefficient (K) of benzoic acid in different solvents and water: ...
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1answer
210 views

Nicotine from tobacco?

I'm reading a couple of methods of extracting nicotine from tobacco. I have read that many people trying to commit suicide with nicotine. The method is simple: Boil some tobacco with water Leave it ...
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1answer
70 views

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 ...
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1answer
117 views

Water extraction of ethanol from petrol

We have now 10% ethanol mixed petrol. Seller says that if this petrol comes in contact even 10 ml of water, all ethanol which is mixed in the petrol will be extracted by water, is it true?
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1answer
39 views

Is there a way to concentrate the vitamin content of a particular food?

I'm looking for a way to extract vitamins out of common food sources of, well, vitamins. Let's take, as an example, Vitamin A which is commonly found in carrots. A carrot (weighing around 60g) should ...
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2answers
480 views

Why using smaller portions are better for extractions

Why is using one smaller portion more efficient than using one large portion for extraction. No math answer please thank you
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37 views

Extraction of TGL with ethanol

We have $\rm 0.1\,g$ of triacylglycerol (TGL) in $\rm3\,mL$ of ethanol ($87\%$)and we extract with $\rm9\,mL$ petrochemical ether. After the extraction,in the solution of ethanol theres are left ...
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2answers
224 views

What is purpose of sulfuric acid in iodine extraction?

I am trying to extract iodine from kelp following this guide here. It calls for sulfuric acid, but I don't see what this does do help the reaction. I thought the reaction was simply oxidizing iodide ...
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1answer
78 views

Skipping the defatting stage in extraction of alkaloids

I am attempting to extract certain alkaloids from green plant matter, which is very high in waxes and fats. I understand that in this scenario it is common to first acidify and then use a non-polar ...
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1answer
54 views

What is the known cheapest chemical solution to extract CO2 from air on industrial scale?

As far as I know, the cheapest non-chemical solution is: grow grass, and burn it. The resulting $\ce{CO2}$ is from the air. But I am interested on chemical industrial solutions now. As far as I know, ...
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1answer
302 views

Replacement for cyclohexane

I am attempting to isolate pure iodine from kelp using the method described here but I do not have any way of possibly obtaining cyclohexane. I was wondering if any easier to obtain solvents would ...
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0answers
12 views

Limits on contaminant size in filtration for extraction, and standard alternatives?

Following up on How to perform solvent extraction of a solid I realized that I haven't quantified the size of the contaminants. I know they aren't soluble in acetone and the target is, but I don't ...
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1answer
118 views

How to perform solvent extraction of a solid

Suppose I have a solid compound from which I want to extract a target chemical I know is soluble in acetone. So I crush and mix the compound in acetone, dissolving the target and suspending the ...
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1answer
796 views

How can an inexperienced chemist determine the chemical structure of a molecule?

I'm a fairly inexperienced, but nonetheless interested chemist, currently planning a small project for the coming summer: I want to isolate an unknown chemical from a plant and determine it's chemical ...
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1answer
679 views

Using Distribution Coefficient to Determine Mass and Percent of Acid Extracted

The $K_\mathrm{D}$ (distribution coefficient) of coffee water at $25\,°\mathrm{C}$ is $7.8$ in a methylene chloride/water system. If there is $2.0\,\mathrm{g}$ of caffeine in $200\,\mathrm{mL}$ of ...
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494 views

When is Serpeck's process preferred over Bayer's process?

Both these processes are used in concentration of bauxite. They use different reagents. Which is more commonly used (wikipedia says Bayer's) and why? When is one preferred over the other? Which is ...
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56 views

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. ...
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2answers
35k views

How do I extract cyanide from apple seeds?

I'm working on a crime story about cyanide poisoning from apple seeds. I just would like to have an idea of what processes and extraction techniques might be involved in getting cyanide from the ...
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1answer
620 views

How to cheaply extract iodine from an alcoholic solution?

I have an alcoholic solution of iodine. My goal is to extract the pure iodine without using rare or expensive compounds. How could I do this?
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4answers
240 views

What possibilities are there for refining aluminium on the moon?

Engines burning aluminium and liquid oxygen have been investigated for use on the moon because there is plenty of both elements in the soil - about 13% and 40% of highland soil, respectively. ...
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1answer
140 views

Is the condenser for a Soxhlet extraction left open on top

My question is about the condenser used in a Soxhlet extractions. It's unusual looking compared to the rest of condensers, used in distillation for example, I've noticed it has a thin and short tube ...
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1answer
515 views

CO2 removal from mushroom growing tent

I'm trying to grow oyster mushrooms that like high temperatures. They look great in an indoor terrarium, and can eventually yield several tasty meals :) However oyster mushrooms are hard to grow ...
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2answers
36 views

Chemical reactions in SFE?

What are the chemical reactions and/or chemical processes that take place during SFE(supercritical fluid extraction)? Namely supercritical $\ce{CO2}$.
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1answer
1k views

Separation of Binary mixture?

I will be given a binary mixture containing two unknown compounds(the mixture could be either liquid or solid- I don't know yet). The plan of the experiment is to identify the two compounds. So my ...
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1answer
1k views

Why should one perform an extraction with multiple small portions of solvent as opposed to one large portion?

I'm performing a liquid liquid extraction on a 1 Liter water sample for GC analysis. The procedure calls for 3 extractions with $50~mL$ of $\ce{CH2CL2}$. Would one extraction with $150~mL$ produce ...
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1answer
204 views

Standard solution and extracted solution : same concentration?

Summary : I am currently testing how a certain type of foam adsorbs HAP, PCB and OCP, and to this end I am depositing some on the foam, then extracting it. To know how much was extracted, I need to ...
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1answer
73 views

Extract acid from a solution

I have a solution containing glucose and some sulfuric acid. I want to distill out the sulfuric acid to then reuse it for other purposes. The problem is the presence of glucose in the solution. I'm ...
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2answers
148 views

Extraction of starch from soup

I have a solution containing many different organic compounds (originally from leek and potato soup) and I would like to extract the starch from it. However, starch is insoluble in water. How could I ...
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1answer
199 views

Can lye be extracted from bamboo ash?

I know that the best source of lye is hardwood. A brief search tells me that Bamboo is considered a hardwood of the monocotyledon variety. I've done a lot of searching to find this answer, but I can't ...
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1answer
1k views

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 ...
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1answer
230 views

Can we extract KI from Lugol solution?

I want to extract the $\ce{KI}$ component of the Lugol solution, is there a method to do it? If not, how can I make a $\ce{KI}$ solution?
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1answer
3k views

Chemical methods to extract Oxygen from Rust

Let's say I have a large quantity of rust and want to extract the oxygen from it in a way that allows me to collect the oxygen in a container. What chemical process can I use to do this and what ...
12
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2answers
339 views

Can we process waste just by decomposing it to homogenous mass and extracting the elements from it?

I. e., what if we just burn trash completely or dissolve it in acid, get the resulting paste and extract pure chemical elements out of it by applying some physics and/or chemistry to it until no more ...
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1answer
70 views

Metal extraction by pyrolysis

There is a process named solar furnace pyrolysis which is used to reduce the oxides of various elements by concentrating solar energy. Oxygen is liberated but an oxide slag is left. $\ce{SiO2 -> ...
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1answer
584 views

How to extract elemental Bismuth from pepto bismol?

I was trying to isolate elemental bismuth from pepto bismol (bismuth subsalicylate) using the process seen here but after I added the HCl, instead of getting a pink foamy substance I got a white ...
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338 views

Can caffeine be separated from coffee?

Is there a way to extract caffeine from coffee completely?
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1answer
1k views

How to extract pure caffeine from tablets?

I have some caffeine tablets and I want to extract the pure caffeine from the rest of the ingredients (caffeine 200 mg. Inactive ingredients in order are corn starch, dextrose, dicalcium phosphate, ...