Continuous gas phase oxidn. of propene to acrolein and acrylic acid - with oxygen@ using only inert diluent gas based on lower satd. hydrocarbons increases safe vol. fractions of reactants and hence productivity

摘要

In continuous gas phase oxidn. of C3H6 to acrolein (I) and/or acrylic acid (II) with heterogeneous catalyst in an oxidn. reactor, the charge gas mixt. (III) contains only inert diluent gas(es) (IIIA) in addn. to C3H6 and O2 and (pt. of) (IIIA) is sepd. from the prodn. gas mixt. and recycled to the oxidn. reactor. The novelty is that (IIIA) consists of over 85 vol. % 1-5C satd. hydrocarbon(s).