Formaldehyde → HCID 21285052, compound

Participants

Reaction Conditions

Reaction Steps

The process for Example 5 was initiated by charging 593.5 g phenol (6.31 moles), 4.3 g of acetic acid (0.72% of phenol) and 75.2 g melamine (0.60 moles) into a reaction vessel to form a reaction mixture. The reaction mixture was heated to 80° C., and 64.1 g of 50.3% aqueous formaldehyde (60% of total charge) was added in over 20 minutes. The reaction mixture went under atmospherically distilling to 123° C., then maintained at 123° C. for 2 hours followed by reducing the reaction mixture temperature to 80° C. 42.5 g of 50.3% aqueous formaldehyde (40% of total charge) was added over about 20 minutes to the reaction mixture, followed by atmospherically distilling the reaction mixture to 123° C., then maintaining the temperature at 123° C. for 1.6 hours, and finally increasing the temperature over 60 minutes to 165° C. and continuing to distill atmospherically. Next, the reaction mixture was under a gradually increasing vacuum over 2 hours to full vacuum of at least 27 inches while maintaining a temperature of 163°-165° C., and then heating the reaction mixture to 175° C. under full vacuum. Further, the process is concluded by removing the vacuum distillate (417.8 g) and discharging the product (263.0 g) from the reaction vessel.

Provenance & Evidence