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Oxidation of styrene to benzaldehyde catalyzed by Dawson-type tungstophosphate

Meng Chen

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Abstract

Oxidation of styrene to benzaldehyde catalyzed by Dawson-type dilacunary heteropoly compound K10Na2H2P2W16O60 using H2O2 as oxidant and acetone as solvent was investigated.The results showed that the main product was benzaldehyde and a little by-products were styrene oxide and phenylacetaldehyde.The conversion of styrene was 95.4% and the selectivity of benzaldehyde was 95.6% when reacting at molar ratio of catalyst∶styrene ∶ H2O2 being 1∶100∶300,reaction temperature 65 ℃ and reaction time 10 h.The merits of this process were easy separation of benzaldehyde,no use of chloride compounds and poisonous heavy metal.The purity of obtained benzaldehyde met food-grade standard.

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Oxidation of styrene to benzaldehyde catalyzed by Dawson-type dilacunary heteropoly compound K10Na2H2P2W16O60 using H2O2 as oxidant and acetone as solvent was investigated.The results showed that the main product was benzaldehyde and a little by-products were styrene oxide and phenylacetaldehyde.The conversion of styrene was 95.4% and the selectivity of benzaldehyde was 95.6% when reacting at molar ratio of catalyst∶styrene ∶ H2O2 being 1∶100∶300,reaction temperature 65 ℃ and reaction time 10 h.The merits of this process were easy separation of benzaldehyde,no use of chloride compounds and poisonous heavy metal.The purity of obtained benzaldehyde met food-grade standard.

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Available abstract

Oxidation of styrene to benzaldehyde catalyzed by Dawson-type dilacunary heteropoly compound K10Na2H2P2W16O60 using H2O2 as oxidant and acetone as solvent was investigated.The results showed that the main product was benzaldehyde and a little by-products were styrene oxide and phenylacetaldehyde.The conversion of styrene was 95.4% and the selectivity of benzaldehyde was 95.6% when reacting at molar ratio of catalyst∶styrene ∶ H2O2 being 1∶100∶300,reaction temperature 65 ℃ and reaction time 10 h.The merits of this process were easy separation of benzaldehyde,no use of chloride compounds and poisonous heavy metal.The purity of obtained benzaldehyde met food-grade standard.

Key concepts: Benzaldehyde, Styrene, Phenylacetaldehyde, Catalysis, Styrene oxide, Chemistry, Selectivity, Solvent

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