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Using Lye in Q21Q21's Vinegar/Lime A/B Extraction Tek Options
 
qetoh
#1 Posted : 10/12/2021 2:13:23 AM
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Hi guys, I just wanted clarification on Q21Q21's Vinegar/Lime A/B Extraction Tek. I'm looking at replacing lime with lye in this tek. I see the warning message "MAKE SURE YOUR LIME IS Calcium Hydroxide OR ELSE THE TEK WILL NOT WORK!" Is this just a warning to use 'lime' products that actually have Ca(OH)2, or is Ca(OH)2 the only base that can be used?

Sorry if this is a repetitive post, I saw this post discussing d-limonene and lye but OP used two different techniques rather than just replacing the Ca(OH)2 with lye.

Thanks!
 

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downwardsfromzero
#2 Posted : 10/13/2021 2:00:42 AM

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Sometimes, products sold as 'lime' are in fact calcium carbonate; these would be utterly useless - you need to make sure any lime you're using is calcium hydroxide.

Lye is very soluble in water, lime only slightly so. This makes a big difference in how the process will be handled. Using lye, you won't be able to make a doughy paste as required in the q21q21 tek. You could in principle do an STB or ATB but using limonene insted of naphtha and then revert to the q21q21 method for recovering the alkaloids from the limonene (unlike naphtha, freeze precipitation doesn't work with limonene).

In the thread you link to, the OP used limonene that was far from pure. [Read through that thread again to see how you might easily tell if your own limonene is no good.]

If you'd rather use the 'drytek' kind of approach, then do the following: Lime can easily be made by mixing lye solution with a solution made with calcium chloride dehumidifier crystals. Both should be quite concentrated. This will produce a thick precipitate of lime, and a concentrated salt solution - maybe with some salt (sodium chloride) crystals too. Let this settle and decant the liquid layer from the top, maybe wash the precipitate with a little distilled water in a similar way.

The lime precipitate may then be used as per the q21q21 tek instructions.

Be sure to exercise all the necessary safety precautions when using lye - it can cause severe burns and blindness if handled incorrectly. When preparing lye solutions, always add the lye to the water and not the other way around. It will get very hot!




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qetoh
#3 Posted : 10/15/2021 8:24:32 AM
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Thanks for the information and advice!!
 
 
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