C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/396, 252/70
C07C 50/12 (2006.01) B01J 23/847 (2006.01) C07C 46/04 (2006.01)
Patent
CA 1234796
METHOD FOR THE PREPARATION OF NAPHTHOQUINONE Abstract of the Disclosure: A catalyst for for use in vapor phase oxidation of naphthalene into 1,4-naphthoquinone is dislosed. The catalyst which is supported on an inert carrier material is represented by the formula: (V)a(K)b(S)c(Fe)d(Sn)e(X)f(O)g where V, K, S, Fe, Sn and O stand for vanadium, potassium, sulfur, iron, tin and oxygen, respectively; X stands for at least one element such as silicon, titanium or aluminum which serves as a carrier in the form of oxide; and a, b, c, d, e, f and g are the atomic fractions of the respective elements wherein the ratio of a : b : c : d : e : f = 10 : 10 - 100 : 5 - 100 : 0.1 - 10 : 0.05 - 10 : 10 - 300. Using the above catalyst the vapor phase oxidation can be effected at a relatively low temperature of not higher than 500°C, usually not higher than 420°C, resulting in the formation of 1,4-naphthoquinone in a high yield and with a high selectivity.
486072
Osler Hoskin & Harcourt Llp
Sumitomo Metal Industries Ltd.
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