D-tartaric acid, and importantly Cas (147-71-7), will preferentially precipitate D-Meth crystals.
13 g of D-tartaric acid was dissolved in 52 ml of methanol, then poured into 20 g of DL-methanol oil and stirred for 6 hours to generate diastereomers (D acid-D base salt)Crystals, (D acid-L base salt) in water . take crystals were filtered and dissolved in an alkaline solution to pH 12 to separate D-methyl oil and D-tartaric acid. Use a separatory funnel to extract D-Meth acidify to pH 6 with HCl to evaporate water to obtain D-ICE 6g
13 g of D-tartaric acid was dissolved in 52 ml of methanol, then poured into 20 g of DL-methanol oil and stirred for 6 hours to generate diastereomers (D acid-D base salt)Crystals, (D acid-L base salt) in water . take crystals were filtered and dissolved in an alkaline solution to pH 12 to separate D-methyl oil and D-tartaric acid. Use a separatory funnel to extract D-Meth acidify to pH 6 with HCl to evaporate water to obtain D-ICE 6g