Hydrochloric Acid → Formaldehyde;phenol

Temperature

85 °C

Phenol (300 g), 220 g of 37% aqueous formaldehyde solution (molar ratio of phenol:formaldehyde=1:0.85) and 0.3 ml of 35% concentrated hydrochloric acid were mixed, and the mixture was heated at 85° C. under reflux with stirring for 5 hours. The mixture was subsequently cooled and then added dropwise to water under stirring. The sediment formed was filtered off, and dissolved in a small amount of methanol. The resulting methanol solution was added to a plenty of water. The sediment formed in the water was filtered off and dried to give a phenolformaldehyde condensate.

1. temperatureunder reflux
2. temperatureThe mixture was subsequently cooled
3. stirringunder stirring
4. customThe sediment formed
5. filtrationwas filtered off
6. dissolutiondissolved in a small amount of methanol
7. additionThe resulting methanol solution was added to a plenty of water
8. customThe sediment formed in the water
9. filtrationwas filtered off
10. customdried
11. customto give a phenolformaldehyde condensate

ORD record

ord-d4b95e1d47e146868219b2734ed26229

Source dataset

uspto-grants-1995_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05399613