Ingredients:
Methylamine hydrochloride (solid)
Sodium hydroxide (NaOH) or Potassium hydroxide (KOH) (solid)
Water
Instructions:
Prepare Basic Solution:
Dissolve sodium hydroxide (NaOH) or potassium hydroxide (KOH) in water to create a basic solution with a concentration of 20-30%.
Dissolve Methylamine Hydrochloride:
Dissolve the methylamine hydrochloride in water to create a concentrated solution.
Calculate Volumes:
Calculate the volume of the concentrated methylamine hydrochloride solution needed to achieve a 40% methylamine concentration. For example, for 100 mL of 40% methylamine solution, you'll need 40 mL of methylamine.
Mix Solutions:
Slowly add the calculated volume of the concentrated methylamine hydrochloride solution to the basic solution while stirring continuously.
Monitor pH:
Monitor the pH of the solution as you add the base. Continue adding the base until the pH reaches around 10-11.
Separate:
Allow the solution to settle, then decant or siphon off the liquid portion containing the methylamine solution.
Safety Precautions:
Handle chemicals safely in a well-ventilated area.
Wear appropriate protective gear, such as gloves and goggles.
Following these steps should yield a 40% methylamine solution.
Methylamine hydrochloride (solid)
Sodium hydroxide (NaOH) or Potassium hydroxide (KOH) (solid)
Water
Instructions:
Prepare Basic Solution:
Dissolve sodium hydroxide (NaOH) or potassium hydroxide (KOH) in water to create a basic solution with a concentration of 20-30%.
Dissolve Methylamine Hydrochloride:
Dissolve the methylamine hydrochloride in water to create a concentrated solution.
Calculate Volumes:
Calculate the volume of the concentrated methylamine hydrochloride solution needed to achieve a 40% methylamine concentration. For example, for 100 mL of 40% methylamine solution, you'll need 40 mL of methylamine.
Mix Solutions:
Slowly add the calculated volume of the concentrated methylamine hydrochloride solution to the basic solution while stirring continuously.
Monitor pH:
Monitor the pH of the solution as you add the base. Continue adding the base until the pH reaches around 10-11.
Separate:
Allow the solution to settle, then decant or siphon off the liquid portion containing the methylamine solution.
Safety Precautions:
Handle chemicals safely in a well-ventilated area.
Wear appropriate protective gear, such as gloves and goggles.
Following these steps should yield a 40% methylamine solution.
I'm skeptical and I'll tell you why. I previously calculated that the maximum percentage of methylamine that could dissolve in water was 50% w/w. By making a solution of methylammonium chloride and a solution of base, you aren't going to be able to achieve a 40% solution. Keeping in mind you can't concentrate it through distillation or evaporation because the methylamine is a gas at room temperature and volume.
Another insurmountable hurdle is the fact that methylammonium chloride ( methylamine HCL) has A solubility of 1.8g/ LITER! IN 20°C water and CH³NH² has a yeild of 43% ( 100g of CH³NH²HCL produces 43g of
CH³NH ²)
Another insurmountable hurdle is the fact that methylammonium chloride ( methylamine HCL) has A solubility of 1.8g/ LITER! IN 20°C water and CH³NH² has a yeild of 43% ( 100g of CH³NH²HCL produces 43g of
CH³NH ²)
Oh and 1 more thing. Neutralizing an HCL with a R' Oh produces H²O and R'CL. R' representing anything that will hang on to a CL-. 1 mole of acid + 1 mole of base = 1 mole of salt and 1 mole of water