Process for producing dihydroxy benzenes

Details Process for producing dihydroxy benzenes Process for producing dihydroxy benzenes

C - Chemistry, Metallurgy

07

C

260/618

C07C 39/08 (2006.01) C07C 37/60 (2006.01)

Patent

CA 1201451

ABSTRACT OF THE DISCLOSURE The nuclear hydroxylation of phenols and phenol derivatives is carried out with solutions of hydrogen peroxide, which are extremely low in water, in solvents forming at the most azeotropes with water whose boiling points are close to or above the boiling point of hydrogen peroxide. The catalyst used is one having the formula XO2, wherein X repre- sents sulphur, selenium or tellurium. Apart from the increase in yield and the fact that technically the nuclear hydxoxyla- tion can be carried out in a much simpler way, the ortho-para ratio and the ortho-ortho ratio of the products are controlled when using selenium dioxide.

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