Process for producing methacrolein and methacrylic acid.

摘要

Methacrolein is produced in a high yield together with a small amount of methacrylic acid by catalytically oxidizing tert-butyl alcohol at a temperature of from 250 to 500 DEG C by using a catalyst comprising an oxide composition of the empirical formula: MoaCobFecBidCseXfYgOh wherein X is either both vanadium and palladium, Y is at least one member selected from titanium, tin and zirconium, a=12, b=2-12, c=0.5-7, d=0.1-5, e=0.0005-0.5, f=0.01-2, g=0-5 and h is a positive number proportional to the number of oxygen atoms satisfying the average valency of the metal atoms stated in the formula, which catalyst has a high resistance to compression and attrition and exhibits a high catalytic efficiency, mechanical strength and durability.