Making Calcium Acetate (from eggshells)
Added 2016-03-31 20:29:41 +0000 UTCThe last post of the month!
I am going to go and distill pyridine from niacin now :)
Comments
1. make the dirty calcium acetate solution 2. convert it back to CaCO3 with sodium bicarbonate 3. wash out the water soluble proteins with water. (but still lots of stuff seems to remain in the solid phase with CaCO3) 4. mix the CaCO3 with NaOH and H2O2 and boil it 5. after it cooled down decant it and wash it with water 6. convert it to calcium acetate again
Adam Rak
2016-11-06 06:27:23 +0000 UTCI have played around with egg shells, and it seems that acetic acid also hydrolyzes the protein parts of the egg shells. I have tried NaOH, but it cannot remove the protein content from egg shells. I ended up with this procedure to purify the CaCO3:
Adam Rak
2016-11-06 06:21:57 +0000 UTCI am honestly not 100% sure what you are trying to say. I am having trouble picturing what you are talking about
Nile Red
2016-04-07 14:51:49 +0000 UTCI've often isolated CO2 from CaO(Ac) production, fairly easy since it can all be done in a sealed container to which you can re-rout the gas (which is for all intended purposes, 99-100% CO2). Since this is a fairly cheap&easy, and long-lived reaction, I picture this as simple enough if you're able to connect your CO2-generator vis-a-vis heat&gas that may dissolve plastic, though I think heat is the only real problem. ... and if the acetic acid doesn't provide enough pressure, maybe HCl will, though I am unsure if it's needed, or if Cl-impurities may chlorinate too much of the product.
The Ashdale Regiment
2016-04-07 14:34:53 +0000 UTCHmm that is interesting to hear about the yellow color. Also, I will do the distillation of the calcium acetate, but i think the yield is going to be pretty bad in general. I have also seen that some people use CO2 positive pressure to prevent combustion or degradation. I am not sure ill be able to do that
Nile Red
2016-04-04 23:53:39 +0000 UTCBoy I've toyed a lot with CaO(Ac), usually as I by-product I end up playing with. I've really wanted to test out acetone-via-pyrolysis, but the one time I tried ended up as,,, well, messy, and inconclusive (though the equipment used was atrociously make-shift, so no wonder). I don't think the yellow (in aq.solution) is a result of impurity, but rather how the chemical refracts light in water. I've made this using a variety of ingredients, from eggshells, to high-grade CaOH/CO3 ingredients. The acetic acid has always been a commercial grade (34-35%). I've also tried various saturation (including salts, organic/inorganic solvents etc) and/or crystallization processes, in which at least one of them should have affected the color, but since it didn't, and other research typically describe CaO(Ac) as yellowish in solution, I am inclined to believe that this appearance is actually, quite simply, a natural characteristic of CaO(Ac). I can't wait to see to make a run for the acetone. I wish I could give some tips, but since you're better equipped, and I've barely tried out the process, I don't think I have any experiential advice,,,, except that you'll really want to emulate a 'venturii scrubber' to prevent half-burnt carbonaceous particles dirty you product, if your process is via pyrolysis.
The Ashdale Regiment
2016-04-04 14:03:44 +0000 UTCIn theory yes. I tried washing the tums though. Nearly impossible to do it cleanly. It stays a thick murky goo. Maybe it's just all the starch floating around though and the CaCO3 is at the bottom? I am not sure. I was thinking that a good way would just be to fire it and burn all of the organic stuff away. It would also convert the CaCO3 into CaO.
Nile Red
2016-04-01 05:19:46 +0000 UTCGetting rid of the sucrose in the Tums should be as simple as grinding it and flushing it with water to dissolve it out, then filtering off the solids, right?
Paul Grodt
2016-04-01 00:50:39 +0000 UTC
