List of reagents
- Use 12.65 kg of benzyl cyanide.
- Require 20 liters of concentrated sulfuric acid (H₂SO₄, 96%).
- Prepare 30 liters of deionized water.
- Use 18 liters of formamide.
- Require 12 liters of formic acid (HCOOH, 99%).
- Prepare 5 kg of sodium carbonate (Na₂CO₃).
- Use 5 liters of hydrochloric acid (HCl, 37%).
- Require 2 kg of sodium hydroxide (NaOH).
- Use 50 liters of dichloromethane (CH₂Cl₂).
- Optionally use 2 kg of lead acetate trihydrate (Pb(C₂H₃O₂)₂·3H₂O).
List of utensils and tools
- Use a 50-100 liter stainless steel or glass-lined reactor with a mechanical stirrer and equipped with temperature control (±2°C).
- Equip an industrial-grade condenser with a cooling circulation system.
- Equip an industrial-grade liquid separation device with a capacity of ≥10 liters.
- Install a large distillation tower with a condensing device and a collecting device with a capacity of ≥20 liters.
- Use an industrial Buchner funnel or filter press for solid-liquid separation.
- Prepare a corrosion-resistant storage tank with a capacity of ≥50 liters.
- Prepare a measuring cylinder (2 liters, 10 liters) and a beaker (500 ml to 5 liters).
- Use an industrial stirring device to ensure uniform mixing.
- Prepare a vacuum pump for vacuum distillation.
- Ensure that there are explosion-proof equipment, ventilation systems and fire extinguishers.
- Provide protective equipment such as protective gloves, goggles, gas masks and acid-proof aprons.
Step 1: Hydrolysis of benzyl cyanide to produce acetophenone
- Add 12.65 kg of benzyl cyanide and 30 liters of deionized water to the reactor, and start the agitator to make the solution uniform.
- Slowly add 20 liters of concentrated sulfuric acid in batches, and control the reaction temperature at 30-50°C to prevent violent exotherm.
- Heat the reaction mixture to 150°C for 1-2 hours and observe the color change from transparent to light brown.
- After cooling to room temperature, separate the acetophenone organic layer with a separatory funnel.
- Collect the 202°C fraction by distillation to obtain purified acetophenone.
Step 2: Acetophenone generates N-methylphenylethylamine through Leuckart reaction
- Add 13.05 kg of acetophenone and 18 liters of formamide to the reactor and start the agitator to mix evenly.
- Slowly add 12 liters of formic acid to ensure that the reactants are fully mixed.
- Heat to 120-140°C and maintain for 3-5 hours. The released gas is discharged through the condenser.
- After the reaction is completed, cool to room temperature and neutralize the mixture in a saturated solution of about 5 kg of sodium carbonate.
- Extract the reaction solution with 50 liters of dichloromethane in 5 times, dry and distill, collect the 194°C fraction, and obtain purified N-methylphenylethylamine.
Step 3: Post-treatment and purification
- Dissolve the purified N-methylphenylethylamine in a small amount of water and acidify to pH about 1 with 5 liters of hydrochloric acid to form the hydrochloride.
- If there are impurities, add 2 kg of lead acetate trihydrate, stir and filter the precipitate.
- Release the free N-methylphenylethylamine with 2 kg of sodium hydroxide solution, then extract it again with dichloromethane, dry and distill.
I reiterate that I am only a hobbyist and do not sell any precursors or substances. Anyone violating escrow transactions is a scammer.
Respect to BB administrators. Salute 🫡