Dihydroxybenzenes

PEP Report No. 79, issued in 1972, presented designs and cost estimates using the information then available in print on processes for production of the three dihydroxybenzene isomers: pyrocatechol (the ortho-isomer), resorcinol (meta), and hydroquinone (para).

Since that time, further technical data have been published on a number of processes for hydroquinone manufacture. The present report gives process design and economic information on five of these newer processes. The processes are:

• Hydroquinone via p-Diisopropylbenzene--Dihydroperoxide Separation by Extraction.
• Hydroquinone via p-Diisopropylbenzene--Dihydroperoxide Separation by Crystallization.
• Hydroquinone from Phenol by Hydroxylation.
• Hydroquinone from Phenol via Bisphenol A.
• Hydroquinone from Phenol and Oxygen.

Other PEP Related Reports:

• Dihydroxybenzenes 79