Nevermore Posted June 3, 2005 Share Posted June 3, 2005 Okay, so I've got a mixture of calcium carbonate, microcrystalline cellulose, stearic acid, croscarmellose sodium, and sodium laurl sulfate. I want to get it as close to pure calcium as possible, what should I do? Link to comment Share on other sites More sharing options...
H2SO4 Posted June 3, 2005 Share Posted June 3, 2005 you mean you want close to pure calcoium carbonate?Are any of these soluble in things others arent?do any of these doecompose with heat? Are they different particle size? Link to comment Share on other sites More sharing options...
akcapr Posted June 3, 2005 Share Posted June 3, 2005 well the cellulose isnt soluable in water, sodum lauryl sufate is soluable in water, caCo3 is, croscamellose is insoluble but will swell up, stearic acid is insoluabe (being a fatty acid). So thus, if u pour water on ur mixture enough to dissolve the carbonate and sulfate, u can then filter it, and dry the solution- whic will leave u with laurel sulfate and caco3. The next step is to get rid of the luarel sulfate Link to comment Share on other sites More sharing options...
budullewraagh Posted June 3, 2005 Share Posted June 3, 2005 CaCO3 is almost completely insoluble in water. if you want the calcium, stoichiometrically add an acid, remove the other insoluble materials and fractionally crystallize Link to comment Share on other sites More sharing options...
Nevermore Posted June 4, 2005 Author Share Posted June 4, 2005 I feel slightly dumb, but, what do stoichiometrically and fractionally crystalize mean, and how do I do them? Link to comment Share on other sites More sharing options...
Silencer Posted June 4, 2005 Share Posted June 4, 2005 That's funny, I've never considered purifying pure calcium. lol. Link to comment Share on other sites More sharing options...
Nevermore Posted June 4, 2005 Author Share Posted June 4, 2005 IMpure Link to comment Share on other sites More sharing options...
akcapr Posted June 4, 2005 Share Posted June 4, 2005 nevermore, do u want caCO3, or elemental Ca? Link to comment Share on other sites More sharing options...
Nevermore Posted June 4, 2005 Author Share Posted June 4, 2005 elemental ca Link to comment Share on other sites More sharing options...
budullewraagh Posted June 4, 2005 Share Posted June 4, 2005 "I feel slightly dumb, but, what do stoichiometrically and fractionally crystalize mean, and how do I do them?" stoichiometrically add an acid. if you know how much CaCO3 you have, convert it to moles and add enough acid so that all the CaCO3 forms the aqueous salt of the acid. make sure the anion of the acid is compatible with Ca. that means no sulfate, for example. a good bet would be HCl. boil the solution until CaCl2 crystals form, then remove them. if you want pure elemental Ca, it can be difficult to make. one idea is to thermite, or better yet, you can fuse the CaCl2 and electrolyze it. just be sure to have a good stream of argon on your mixture, as the Ca will oxidize immediately. if you want pure Ca metal, http://www.kno3.com is a good source Link to comment Share on other sites More sharing options...
H2SO4 Posted June 5, 2005 Share Posted June 5, 2005 Why dont you just go to the store and buy calcium carbonate from where the tincture of idoine is. Im pretty sure its an over-the-counter item. Link to comment Share on other sites More sharing options...
jdurg Posted June 5, 2005 Share Posted June 5, 2005 You can buy calcium carbonate at Staples. It's known as 'Chalk'. Link to comment Share on other sites More sharing options...
Nevermore Posted June 5, 2005 Author Share Posted June 5, 2005 ARG! Read posts 1 and 9, I want pure, elemental, not carbanate, CA! Link to comment Share on other sites More sharing options...
akcapr Posted June 5, 2005 Share Posted June 5, 2005 ya, but u can buy the carbonate and bypass the filtering/seperating steps to get the caco3 out of the mixture u have. And its not gonna be easy getting ca out of thew stuff either way. Link to comment Share on other sites More sharing options...
budullewraagh Posted June 5, 2005 Share Posted June 5, 2005 i told you. get pure carbonate, add hydrohalic acid, electrolyze fused salt Link to comment Share on other sites More sharing options...
Silencer Posted June 5, 2005 Share Posted June 5, 2005 IMpure Read your topic title, smart guy. Link to comment Share on other sites More sharing options...
Nevermore Posted June 5, 2005 Author Share Posted June 5, 2005 Read your topic title, smart guy. I want to purifye impure ca, so I have pure ca. I don't know how to make it any clearer. Link to comment Share on other sites More sharing options...
akcapr Posted June 6, 2005 Share Posted June 6, 2005 impure calcium as in a calcium compound right? Link to comment Share on other sites More sharing options...
Nevermore Posted June 6, 2005 Author Share Posted June 6, 2005 yes Link to comment Share on other sites More sharing options...
H2SO4 Posted June 6, 2005 Share Posted June 6, 2005 You ant do electryoysis of CaCO becuase its Mp is to high. Get or make CaCl2 then electroylize that. Or just do what budelgrwag said. But nontheless, your gonna need high temp equipment But ya, if i were you id just forget about "making" pure Ca. Link to comment Share on other sites More sharing options...
akcapr Posted June 6, 2005 Share Posted June 6, 2005 wat a crazy idea gettting elemental calcium out of that crap... Link to comment Share on other sites More sharing options...
H2SO4 Posted June 6, 2005 Share Posted June 6, 2005 i know Link to comment Share on other sites More sharing options...
akcapr Posted June 6, 2005 Share Posted June 6, 2005 might as well wonder how to get calcium from milk Link to comment Share on other sites More sharing options...
YT2095 Posted June 6, 2005 Share Posted June 6, 2005 why not go to a garden center and buy a bag of garden lime, it`s calcium hydroxide, then dissolve it in HCl, to make your calcium chloride, then electrolyse it. OR you can buy Calcium Chloride direct in the form of crystals used in de-humidifiers, I think they even sell them at Woolworths! Link to comment Share on other sites More sharing options...
H2SO4 Posted June 6, 2005 Share Posted June 6, 2005 Woolworths? Link to comment Share on other sites More sharing options...
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