Phenol → 4-Vinylphenol

Participants

Reaction Steps

Crude ethylphenol consisting of 2.0% phenol and m- and p-cresols, 0.2% o-ethylphenol, 55.8% m-ethylphenol and 42.0% p-ethylphenol was dissolved in benzene, and dehydrogenated at a temperature of 600° C. and LHSV of 1.0 hr-1 under atmospheric pressure using the same catalyst as in Example 1, with the ethylphenol/benzene/water molar ratio being 1/1/12. The resulting product was allowed to stand at room temperature followed by separating the water. The crude vinylphenol so separated consisted of 39.0% benzene, 4.3% phenol and m- and p-cresols, 0.1% o-ethylphenol, 22.1% m-ethylphenol, 10.4% p-ethylphenol, traces of o-vinylphenol, 10.1% m-vinylphenol, 9.5% p-vinylphenol, 0.5% oligomers of vinylphenols and 4.0% water with the p-vinylphenol/(ethylphenols+ m-vinylphenol) molar ratio being 0.61. The crude vinylphenol was directly placed in a three necked glass reactor equipped with a stirrer, and heat polymerized at 140° C. for 4 hours to afford a crude p-vinylphenol polymer consisting of 1.2% oligomers of vinylphenols, 7.5% phenol and m- and p-cresols, 0.2% o-ethylphenol, 39.0% m-ethylphenol, 18.3% p-ethylphenol, 17.4% m-vinylphenol, and 16.4% p-vinylphenol polymer.

Provenance & Evidence