The tri(4-hydroxyphenyl)methane was synthesized by using phenol and p-hydroxy benzaldehyde as feed stock

p-toluenesulfonic acid and aluminium chloride as catalyst. The chemical structure of tri(4-hydroxyphenyl)methane was characterized by Fourier-transform infrared (FTIR) spectrometer and

1

H NMR spectrometer. Four factors such as usage of catalyst

reaction temperature

material ratio and reaction time was studied in experiment

with the increasing of the reaction temperature

the yield increased; with the increasing of catalyst usage

the yield showed an earlier raised and later decreased; with the increasing of material ratio

the yield increased

and then trends toward constance. The result shows that the optional process is that n(phenol)/n(p-hydroxy benzaldehyde)is 10:1

n(p-toluenesulfonic acid)/n(p-hydroxy benzaldehyde) is 1:2

n(aluminium chloride)/n(p-hydroxy benzaldehyde) is 1:6

reaction time is 4h and reaction temperature is 45℃. Under the processing parameter

the yield of product is up to 90%

the purity of the product is up to 99%.