2

votes

Dissolving eggshells using X solution?

Answered on August 19, 2014
Created March 08, 2011 at 4:11 PM

I intend to use eggshells to make my own calcium supplement. I read somewhere that eggshells submerged in acetic acid yield calcium acetate. Is this true? And if so, would submerging them in lemon juice eventually yield calcium citrate?

8f08fb03fc5c2f44b7d5357e8a3ab1c5

on March 09, 2011
at 03:33 AM

I'll wash the eggshells and submerge them in lemon juice. Wait until reaction is complete and then it's up to you whether you wish to dehydrate the mix to get powder. It's supposed to be about 1800 mg elemental calcium per medium eggshell.

B3c62d89cd47b7d7209b6a99243d0ded

(10778)

on March 09, 2011
at 02:33 AM

Here is a clever description::: I learned to make coffee from Steinbeck, who himself learned "on Bourbon Street from giants in the earth": "I went into my house and set coffee to cooking, and remembering how Roark Bradford liked it, I doubled the dosage, two heaping tablespoons of coffee to each cup and two heaping for the pot. I cracked an egg and cupped out the yolk and dropped white and shells into the pot, for I know nothing that polishes coffee and makes it shine like that." That, and "a little chicory for bite". All in all, a truly outstanding cup of coffee, for those dedicated few.

B3c62d89cd47b7d7209b6a99243d0ded

(10778)

on March 09, 2011
at 02:30 AM

I've tried it and the shells sort of get soggy and wilty. I would not keep them together in the fridge, but frozen = inert to me. I'm also reminded of the old eggshells in coffee bit.

4b97e3bb2ee4a9588783f5d56d687da1

(22923)

on March 08, 2011
at 08:41 PM

Hopefully he's eating the yolk of the eggs he's melting down.

531db50c958cf4d5605ee0c5ae8a57be

(8868)

on March 08, 2011
at 08:30 PM

Good idea. Have you tried this? I keep a bag of bones in my freezer until I have enough for broth. Any issues with keeping eggshells and bones together in the freezer? My "kosher" sense is offended but I'm not sure why...

145d4b0f988af15acc6b26eccc1f4895

(1932)

on March 08, 2011
at 08:26 PM

Hmm....I see PH doesn't like carriage returns. There should be some line breaks in there.

145d4b0f988af15acc6b26eccc1f4895

(1932)

on March 08, 2011
at 08:25 PM

Well, my hero and "other half" (who DID study chemistry in college) sent me this explanation: Calcium Carbonate + Acetic Acid ==> Calcium Acetate + CO2 + water Calcium Carbonate + Citric Acid ==> Calcium Citrate + CO2 + water Lemon juice contains citric acid.

Ce762ef3660ab44dbc72fdd7ff8fb168

(290)

on March 08, 2011
at 07:25 PM

Can you explain this process? I am intrigued ...

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4 Answers

2
B3c62d89cd47b7d7209b6a99243d0ded

on March 08, 2011
at 08:03 PM

You can add them to a working Bone Broth with a bit of Vinegar, and the calcium you seek will go into the soup that you drink.

B3c62d89cd47b7d7209b6a99243d0ded

(10778)

on March 09, 2011
at 02:30 AM

I've tried it and the shells sort of get soggy and wilty. I would not keep them together in the fridge, but frozen = inert to me. I'm also reminded of the old eggshells in coffee bit.

B3c62d89cd47b7d7209b6a99243d0ded

(10778)

on March 09, 2011
at 02:33 AM

Here is a clever description::: I learned to make coffee from Steinbeck, who himself learned "on Bourbon Street from giants in the earth": "I went into my house and set coffee to cooking, and remembering how Roark Bradford liked it, I doubled the dosage, two heaping tablespoons of coffee to each cup and two heaping for the pot. I cracked an egg and cupped out the yolk and dropped white and shells into the pot, for I know nothing that polishes coffee and makes it shine like that." That, and "a little chicory for bite". All in all, a truly outstanding cup of coffee, for those dedicated few.

531db50c958cf4d5605ee0c5ae8a57be

(8868)

on March 08, 2011
at 08:30 PM

Good idea. Have you tried this? I keep a bag of bones in my freezer until I have enough for broth. Any issues with keeping eggshells and bones together in the freezer? My "kosher" sense is offended but I'm not sure why...

1
Medium avatar

on March 08, 2011
at 07:12 PM

You'd probably want to ensure that you are consuming sufficient amounts of vitamin K2 in order to mineralize all of that calcium.

4b97e3bb2ee4a9588783f5d56d687da1

(22923)

on March 08, 2011
at 08:41 PM

Hopefully he's eating the yolk of the eggs he's melting down.

0
145d4b0f988af15acc6b26eccc1f4895

on March 08, 2011
at 07:57 PM

Well, now this brings up a question (I am not a chemist - never even took it in school, so please understand the ignorance). Various references I see on the internet, such as http://van.physics.illinois.edu/qa/listing.php?id=461 indicate that the calcium in eggs is not citrate, but carbonate.

Is there something in the acid that then changes the carbonate to citrate, or is there a different problem/issue?

I notice also that the OP mentions acetic acid, which I have always understood to be a major component of vinegar, but then mentions soaking the eggshells in lemon juice.

I'm lost.....

145d4b0f988af15acc6b26eccc1f4895

(1932)

on March 08, 2011
at 08:26 PM

Hmm....I see PH doesn't like carriage returns. There should be some line breaks in there.

145d4b0f988af15acc6b26eccc1f4895

(1932)

on March 08, 2011
at 08:25 PM

Well, my hero and "other half" (who DID study chemistry in college) sent me this explanation: Calcium Carbonate + Acetic Acid ==> Calcium Acetate + CO2 + water Calcium Carbonate + Citric Acid ==> Calcium Citrate + CO2 + water Lemon juice contains citric acid.

0
8f08fb03fc5c2f44b7d5357e8a3ab1c5

on March 08, 2011
at 06:50 PM

Update: no need to answer because I found out that, indeed, citric acid and eggshells will yield, among other ingredients, calcium citrate. It will be simple enough to make and won't have nearly as much lead as bone meal, if certain studies are to be trusted.

Ce762ef3660ab44dbc72fdd7ff8fb168

(290)

on March 08, 2011
at 07:25 PM

Can you explain this process? I am intrigued ...

8f08fb03fc5c2f44b7d5357e8a3ab1c5

on March 09, 2011
at 03:33 AM

I'll wash the eggshells and submerge them in lemon juice. Wait until reaction is complete and then it's up to you whether you wish to dehydrate the mix to get powder. It's supposed to be about 1800 mg elemental calcium per medium eggshell.

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