Production of p-Cresol

  • Author:Hubei Ocean Biotech Co,.LTd
  • Release on :2016-05-20

Production of p-Cresol

Together with many other compounds, p-cresol is traditionally extracted from coal tar, the volatilized materials obtained in the roasting of coal to produce coke. This residue contains a few percent by weight of phenol and cresols. p-Cresol is currently prepared industrially mainly by a two step route beginning with the sulfonation of toluene:

CH3C6H5 + H2SO4 → CH3C6H4SO3H + H2O

Base hydrolysis of the sulfonate salt gives the sodium salt of the cresol:

CH3C6H4SO3Na + 2 NaOH → CH3C6H4OH + Na2SO3 + H2O

Other methods for the production of p-cresol include chlorination of toluene followed by hydrolysis. In the cymene-cresol process, phenol is alkylated with propylene to give p-cymene, which can be oxidatively dealkylated.

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