The methyl phenol distillate derived from coal coking oil was 6 per cent of the adjacent cresol, 49.4 per cent of cresol, 32.1 per cent of cresol, and a dimethyl phenol and a small amount of phenol.
O-cresol low boiling point, BHT between than 10 ℃, may use general distillation column will be separated.
Cut crude phenol distillation of o-cresol fraction in no less than 40 pieces of theoretical plate distillation column in the distillation, reflux ratio to 14-15:1, cut distillation range of 188-192 ℃, the melting point of pure o-cresol about 29 ℃, the purity is more than 97%.
Synthesis basically has the following kinds: 1. The phenol alkylation method with phenol and methanol as raw materials, and under 4.14 MPa pressure table 3 oxidation 2 aluminium for methylation in the presence of catalyst.
The adjacent methylaniline method is used for reagent production, which is diazide and hydrolyzed by adjacent methylaniline.
Toluene hydroxylation.