Is there a general ratio between amount of ephedrine used and amount of finished product? (rp push/pull method)

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Originally posted by Edorion:
Is there a general ratio between amount of ephedrine used and amount of finished product? (rp push/pull method)

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I think around 50%.

50%???? if you're obtaining yields like this, then i strongly suggest you double check you reaction and method! theoretically, the reduction of pseudo/ephedrine via P4~HI is 95% yield meth! SWI-Richy yields usually about 90% after the reaction, and 85% after recrystalization!

from

Richy

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Originally posted by Richy:
50%???? if you're obtaining yields like this, then i strongly suggest you double check you reaction and method! theoretically, the reduction of pseudo/ephedrine via P4~HI is 95% yield meth! SWI-Richy yields usually about 90% after the reaction, and 85% after recrystalization!

from

Richy

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Aah, thank you for informing me, and for not being a dick about it. I had read in another topic that 50% should be expected, 85 would make it worthwhile.

no no no

you get 50 percent yields or less first starting out
youre talking about purity not yields

ex. i have 2 grams e i turn into 1 gram of 95 percent pure meth
i have 95 percent pure meth with a 50 percent yield get it?

[This message has been edited by D.N.S (edited 01-02-2003).]

95% is unlikely as during each lab procedure you lose roughly 5% every time.

p/p is for quick speedy blast.
long wet reflux is for patient people who receive in turn for their patience get ~85% return rate.

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Originally posted by rudebwoy:
95% is unlikely as during each lab procedure you lose roughly 5% every time.

p/p is for quick speedy blast.
long wet reflux is for patient people who receive in turn for their patience get ~85% return rate.

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I've never seen anything on a synth like that, maybe I'm just not looking hard enough, could you point me in the right direction?