Hydrochloric Acid → Formaldehyde;phenol

Temperature

85 °C

A mixture of 300 g of phenol, 220 g of a 37% aqueous formaldehyde solution (the molar ratio of phenol to formaldehyde being 1:0.85) and 0.3 ml of 35% concentrated hydrochloric acid was heated under reflux at 85° C. for 5 hours with stirring. Thereafter, the reaction mixture obtained was cooled and added dropwise to water with stirring. The resulting precipitate was filtered off and dissolved in a small amount of methanol. The methanol solution thus obtained was poured into a large amount of water, and the resulting precipitate was filtered off and dried to give a phenol-formaldehyde condensate.

1. temperaturewas heated
2. customThereafter, the reaction mixture obtained
3. temperaturewas cooled
4. stirringwith stirring
5. filtrationThe resulting precipitate was filtered off
6. dissolutiondissolved in a small amount of methanol
7. customThe methanol solution thus obtained
8. filtrationthe resulting precipitate was filtered off
9. customdried

ORD record

ord-9cd07801764c4d29946ee76ad6fc9a8f

Source dataset

uspto-grants-1999_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05889103