Phenol → 2,4-Divinylphenol

Participants

Reaction Steps

1 mol of phenol was reacted with 2.2 moles of styrene in the presence of 0.5% of paratoluene sulphonic acid based on the phenol, until the temperature rose to 135° C. The reactants were held at this temperature for 15 minutes, then neutralized with sodium carbonate solution, washed with twice the phenol weight of water; half the phenol weight of toluene was added, the mix agitated, and then allowed to settle The top water layer was drawn off, the toluene was distilled off, and the product filtered to ensure clarity. A yield of 338% by weight basis of the original phenol content was obtained. The product had a refractive index of 1.603 and a viscosity of 5000 cP at 25° C. (as measured by a Brookfield viscometer, model RVF, spindle 4, speed 20 rpm, at 25° C.).

Provenance & Evidence