Process for the preparation of phenylhydroquinone

Details Process for the preparation of phenylhydroquinone Process for the preparation of phenylhydroquinone

C - Chemistry, Metallurgy

07

C

C07C 39/15 (2006.01) C07C 37/06 (2006.01) C07C 37/14 (2006.01)

Patent

CA 2115764

2115764 9304027 PCTABScor01 Disclosed is an improved process for the preparation of phenylhydroquinone wherein hydroquinone is first alkylated with cyclohexene to produce cyclohexylhydroquinone which is then dehydrogenated to obtain phenylhydroquinone. The improvement comprises carrying out both the alkylation and dehydrogenation reactions in the presence of a solvent comprising diphenyl ether, biphenyl or a mixture thereof. The solvent possesses selective solubility for hydroquinone and cyclohexylhydroquinone which permits the separation of unreacted hydroquinone from the alkylation reaction product. The boiling point of the solvent also permits the dehydrogenation reaction to be performed at substantially atmospheric pressure.

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