Solution

[Johnski]

Hello everyone

I have a problem and I have racemic methamphetamine HCL dissolved in water and ethanol, made basic with NaOH and added tartaric acid!
How can I save the whole mixture?
Or just filter it and the Solution is with d meth?

 

[Frit Buchner]

Selective Crystallization of Methamphetamine with d-Tartaric Acid:

Rusznak et al., Resolution of 1-Phenylisopropyl methyl amine, Hung. Teljes, 12,210 (Cl. C07B), 28 Sep. 1976, Appl. 1,520, 04 Dec. 1974; C.A. 85: 192335n, p. 518 (1976).

Phenylisopropylmethylamine was resolved by treatment with 0.4-6 moles of dextro tartaric acid in water or aqueous ethanol containing 0.4-6 moles hydrogen chloride.

A mixture of phenylisopropylmethylamine 150, d-tartaric acid 82.5, and H2O 330 g was treated with HCl to pH 4 to deposit 120 g L-phenylisopropylmethylamine-d-tartrate salt, which gave 88 g L-phenylisopropylmethylamine. The D-enantiomer (58 g as the HCl salt) was isolated from the filtr