... MoO3 as active components, using fixed-bed for benzene oxidation to maleic anhydride. This catalyst has high active, excellent strength, ... 98% -99% conversion rate, good selectivity and yield up to 90% -95%. Longevity of the catalyst after treatment, service life ... reduced significantly, the life of the product is up to two years or more.Physical and chemical properties:Index NameIndexAppearanceBlack ...