Shape-selective catalytic oxidation of phenol
AssigneeMobil Oil Corporation
InventorsClarence D. Chang, Stuart D. Hellring
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Abstract
This invention provides a process in which phenol is reacted with hydrogen peroxide to form hydroquinone in the presence of a shape-selective zeolite catalyst such as HZSM-5. Essentially no catechol byproduct is produced.
Claims14
A process for shape-selective oxidation of phenol which comprises reacting phenol with hydrogen peroxide at a temperature between about 0.degree.-150.degree. C. in the presence of a zeolite catalyst having a Constraint Index between about 2-10 and an Alpha value greater than about 20, and producing hydroquinone product.
A process for shape-selective hydroxylation of phenol which comprises adding hydrogen peroxide by gradual addition to a reaction medium which is at a temperature between about 0.degree.-150.degree. C. and which comprises phenol and a zeolite catalyst having a Constraint Index between about 8-10, a silica/alumina ratio between about 12-500 and an Alpha value between about 50-500, and producing a dihydroxybenzene product comprising 1,4-dihydroxybenzene.
Dependencies are inferred from the claim text.