Purification of hydroquinone
AssigneeThe Goodyear Tire & Rubber Company
InventorsBudd H. Sturm, Thomas J. Slam
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Abstract
There is disclosed the method of preparing photographic grade hydroquinone from technical grade hydroquinone which consists of treating a solution of the technical grade hydroquinone in the presence of a palladium catalyst with hydrogen while the hydroquinone solution is at a pH between about 3 and about 6.
Claims7
In the method of subjecting technical grade hydroquinone to a process which consists of preparing a water solution of technical grade hydroquinone and subsequently treating such water solution with hydrogen at pressures from about 5 to about 150 psig while in the presence of from about 0.1 to about 1 percent by weight of palladium on a support, at temperatures ranging from about 25 to about 125.degree. C. and recovering photographic hydroquinone from said solution which improvement comprising adjusting the pH of the water solution of hydroquinone to a pH between about b 3 and about 6.
Dependencies are inferred from the claim text.