Introduction
In this work, a water or ethanol-water solutions of methamphetamine hydrochloride are obtained in the first stage. On the next stage, these solutions are crystalized by using of different methods to get methamphetamine hydrochloride (Ice) crystals.Starting materials:
- 150 g Racemic methamphetamine hydrochloride
- 75 ml EtOH 88%
- 80 ml Acetone
- 500 ml Water (H2O)
Procedures
Starting methamphetamine hydrochloride. Fig 1Methamphetamine hydrochloride dissolved in EtOH. Fig 2
The obtained solution is filtered through a paper filter. Fig 3
The filtered solution. Fig 4
The solution is subjected to freezing at a temperature of -10-(-15)°C for 24-36 hours. Fig 5
The solution is decanted. Fig 6
The crystals are filtered using a vacuum filter. Crystals in a warm environment will dissolve in their own mother liquor solution. Fig 7
Next stage, the crystals are combined again with the mother liquor solution, and 150 ml of water is added. Fig 8
The resulting solution is filtered through a paper filter. Fig 9
The filtered solution is evaporated to crystallization at a temperature of 50-70°C over the course of 3 days. This process also prevents the formation of ice crystals. Fig 10
The fully crystallized solution. Fig 11
All methamphetamine hydrochloride dissolved in water. Fig 12
The solution is left in the open air for evaporation and crystallization at room temperature. Crystals began to appear after 1.5 months. Fig 13
The appearance of the crystallized solution is shown in the Fig 14 and Fig 15.
Fig 15
The obtained crystals are carefully transferred onto a vacuum filter and washed with 40 ml of ice-cold anhydrous acetone. Fig 16
After the first washing, the crystals are additionally washed with another portion of acetone, 40 ml. Fig 17
The crystals are dried on a vacuum filter. Fig 18
The crystals resemble transparent plates, reminiscent of ice. Fig 19
The crystal of the methamphetamine hydrochloride. Fig 20
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