Benzylic oxidation and catalyst therefor
First Claim
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1. A catalyst comprising a palladium salt, a metal persulfate, a third metal salt and a tin salt, in a carboxylic acid;
- wherein said third metal salt has a general formula of MX wherein M is a metal selected from the group consisting of alkali metals and alkaline earth metals and X is an anion selected from the group consisting of carboxylate, sulfate, nitrate, phosphate, halide, and mixtures thereof; and
said metal persulfate is selected from the group consisting of an alkali metal persulfate, an alkaline earth metal persulfate, and mixtures thereof.
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Abstract
Oxidation of alkylaromatics having a benzylic hydrogen atom is catalyzed by a catalyst comprising a palladium salt, a metal persulfate, a third metal salt, and a tin salt in a carboxylic acid for a period of time sufficient to convert the alkylaromatics to their corresponding oxidized derivatives. The catalyst is prepared by preheating the palladium salt and the metal persulfate at a temperature sufficient to provide the desired catalytic activity followed by addition of the third metal salt and the tin salt.
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Citations
19 Claims
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1. A catalyst comprising a palladium salt, a metal persulfate, a third metal salt and a tin salt, in a carboxylic acid;
- wherein said third metal salt has a general formula of MX wherein M is a metal selected from the group consisting of alkali metals and alkaline earth metals and X is an anion selected from the group consisting of carboxylate, sulfate, nitrate, phosphate, halide, and mixtures thereof; and
said metal persulfate is selected from the group consisting of an alkali metal persulfate, an alkaline earth metal persulfate, and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- wherein said third metal salt has a general formula of MX wherein M is a metal selected from the group consisting of alkali metals and alkaline earth metals and X is an anion selected from the group consisting of carboxylate, sulfate, nitrate, phosphate, halide, and mixtures thereof; and
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19. A catalyst comprising palladium acetate, potassium persulfate, potassium acetate and stannous acetate, in acetic acid wherein said catalyst is prepared by the process comprising:
- (1) mixing said palladium acetate, said potassium persulfate, and said potassium acetate to form a suspension;
(2) heating said suspension at 90°
C. to 120°
C. for 20 minutes to 1 hour to form a heated suspension; and
(3) adding said potassium acetate and said stannous acetate to said heated suspension.
- (1) mixing said palladium acetate, said potassium persulfate, and said potassium acetate to form a suspension;
Specification