The Synthesis Of N,N-Dimethyl-P-Toluidine cas 99-97-8

N,N-Dimethyl-P-Toluidine cas 99-97-8 is a colorless or quantified p-methylamine dissolved in quantitative distilled water first light yellow oily liquid, with rotten egg smell, structure formula for solution, transferred into a three-mouth round bottom flask containing stirring BC < Na, points in the thousand and, at the same time and fixed quantity of catalyst, open mix and slowly drops of dimethyl sulfate, toluidine: dimethyl sulfate = 3:5 (mole ratio), and control reaction temperature in the atmospheric pressure boiling point 200 ℃, temperature heavy 0.92870936 emL, refractive index m = 1.5360 154760 ℃ or so, add finished, at 60 ℃ insulation does not dissolve in water, soluble in some organic solvents, with light 30 mn, cooled to below 35 ℃, slowly add the NaOH solution, the neutralization of reactants. 

The yield of the neutralized mixture was 94%. This product is usually used as a promoter and can be dehydrated with anhydrous sodium sulfite and left for more than 2 hours in the dark. Used as curing accelerator for unsaturated polyester resin and for improving the permeability of 24 refined capsule shell. The dehydrated crude product was transferred to the flask of gram 2 synthesis 21, the main raw material of which was installed with the condensing device, and then negative pressure rectification was carried out. The total yield was about 90%, and the refraction rate of the product was 1.5360-1.5470 norm-p-toluidine (chemically pure) in m. Dimethyl sulfate. Learn pure); Sodium hydroxide reagent; Anhydrous sodium sulfite reagent; 

Three points of N,N-Dimethyl-P-Toluidine cas 99-97-8 for attention catalyst. 

(1)due to the decomposition of the product in light, both the raw product and the finished product should be stored in the main reaction H+(a)9

(2) due to the high toxicity of the raw material, the operation site should be well ventilated. As this product is relatively expensive, attention should be paid to the recovery of a small amount of finished products absorbed during dehydration.