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Author: Subject: Routes to Calcium benzoate
angelhair
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[*] posted on 1-12-2008 at 01:15
Routes to Calcium benzoate


I can only think of 2.
Benzoic acid with CaCO3 and benzotrichloride with CaO. How many other easy ways are there?
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a_bab
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[*] posted on 1-12-2008 at 04:16


I find benzoic acid + lime water as the easiest way.
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Picric-A
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[*] posted on 1-12-2008 at 05:35


Benzoic acid with a emultion of CaOH in water.
What other ways were you thinking of?
Its a acid base reaction... cant get any easier...
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DJF90
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[*] posted on 1-12-2008 at 06:39


"Double substitution" between potassium/sodium benzoate and calcium chloride. Calcium benzoate has solubility of ~2.7g/100ml at 20C and so should precipitate out. Alkali metal chloride will remain in solution.
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chemkid
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[*] posted on 1-12-2008 at 12:29


Sorry to be so picky, but i believe terminology is important.
Ca(OH)2 in water is actually a suspension not an emulsion. An emulsion is a liquid in liquid colloid.
http://en.wikipedia.org/wiki/Colloid

Sorry, just thought that was important.

Anyway, what are OTC sources of benzoic acid (i see it in all the cereals)

Chemkid




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chemrox
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[*] posted on 1-12-2008 at 20:45


Benzoic acid, Ca propionate and Ca benzoate are available in bulk from food suppliers. Maany other salts as well.



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Picric-A
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[*] posted on 2-12-2008 at 00:10


Sorry chemkid , your right i meant a suspention.
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angelhair
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[*] posted on 5-12-2008 at 19:03


Benzoic acid and Na benzoate yes. but I haven't seen Ca benzoate anywhere. Food ingredient suppliers or chemical companies don't seen to stock it, at least in the southern hemisphere.
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