Catalysts for the oxidation of unsaturated aldehydes to...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide

Reexamination Certificate

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C502S211000, C502S248000, C502S255000, C502S306000, C502S308000, C502S312000, C502S317000, C502S321000, C502S322000, C502S323000, C502S415000, C502S439000, C502S104000, C502S110000, C502S113000, C502S117000

Reexamination Certificate

active

06989347

ABSTRACT:
A catalyst composition for the production of carboxylic acids by the oxidation of the corresponding unsaturated aldehydes, and methods for making and using the catalyst compositions. The catalysts include compositions of the formula:in-line-formulae description="In-line Formulae" end="lead"?MoaVbAlcXdYeOzin-line-formulae description="In-line Formulae" end="tail"?wherein X is at least one element selected from W and Mn; Y is at least one element selected from Pd, Sb, Ca, P, Ga, Ge, Si, Mg, Nb, and K; a is 1; b is 0.01–0.9; c is 0<0.2; d is 0<0.5; e is 0<0.5; and z is an integer representing the number of oxygen atoms required to satisfy the valency of the remaining elements in the composition. Using the catalyst composition of the present invention, one may effectively oxidize the desired starting materials at relatively high levels of conversion, selectivity, and productivity, and with minimal side products.

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International Search Report in PCT Appl. No. PCT/EP 01/04433 dated Jan. 25, 2002.

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